/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/send-receive-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:33:37,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:33:37,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:33:37,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:33:37,275 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 [2021-08-12 19:33:37,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:33:37,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:33:37,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:33:37,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:33:37,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:33:37,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:33:37,304 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:33:37,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:33:37,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:33:37,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:33:37,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:33:37,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:33:37,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:33:37,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:33:37,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:33:37,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:33:37,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:33:37,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:33:37,307 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:33:37,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:33:37,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:33:37,307 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:33:37,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:33:37,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:33:37,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:33:37,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:33:37,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:33:37,558 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:33:37,559 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:33:37,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl [2021-08-12 19:33:37,560 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/send-receive-alt.wvr.bpl' [2021-08-12 19:33:37,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:33:37,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:33:37,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:33:37,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:33:37,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:33:37,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,616 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:33:37,617 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:33:37,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:33:37,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:33:37,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,628 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/1) ... [2021-08-12 19:33:37,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:33:37,631 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:33:37,631 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:33:37,631 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:33:37,632 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (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 [2021-08-12 19:33:37,679 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:33:37,680 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:33:37,680 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:33:37,681 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:33:37,681 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:33:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:33:37,681 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:33:37,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:33:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:33:37,682 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:33:37,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:33:37,801 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-12 19:33:37,801 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-12 19:33:37,802 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:33:37 BoogieIcfgContainer [2021-08-12 19:33:37,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:33:37,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:33:37,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:33:37,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:33:37,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:33:37" (1/2) ... [2021-08-12 19:33:37,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1857af81 and model type send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:33:37, skipping insertion in model container [2021-08-12 19:33:37,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:33:37" (2/2) ... [2021-08-12 19:33:37,807 INFO L111 eAbstractionObserver]: Analyzing ICFG send-receive-alt.wvr.bpl [2021-08-12 19:33:37,811 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:33:37,811 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:33:37,812 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:33:37,837 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-12 19:33:37,851 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 19:33:37,864 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:33:37,864 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:33:37,864 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:33:37,865 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:33:37,865 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:33:37,865 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:33:37,865 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:33:37,865 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:33:37,884 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 58 flow [2021-08-12 19:33:37,892 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) [2021-08-12 19:33:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) [2021-08-12 19:33:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-12 19:33:37,897 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:37,897 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:37,898 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:37,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:37,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1070659179, now seen corresponding path program 1 times [2021-08-12 19:33:37,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:37,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413248360] [2021-08-12 19:33:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:38,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:38,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413248360] [2021-08-12 19:33:38,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413248360] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:33:38,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:33:38,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:33:38,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582866804] [2021-08-12 19:33:38,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:33:38,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:38,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:33:38,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:33:38,061 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 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) 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) [2021-08-12 19:33:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:38,108 INFO L93 Difference]: Finished difference Result 46 states and 87 transitions. [2021-08-12 19:33:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:33:38,109 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 [2021-08-12 19:33:38,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:38,115 INFO L225 Difference]: With dead ends: 46 [2021-08-12 19:33:38,115 INFO L226 Difference]: Without dead ends: 30 [2021-08-12 19:33:38,117 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:33:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-12 19:33:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-12 19:33:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2021-08-12 19:33:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 57 transitions. [2021-08-12 19:33:38,160 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 57 transitions. Word has length 11 [2021-08-12 19:33:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:38,161 INFO L482 AbstractCegarLoop]: Abstraction has 30 states and 57 transitions. [2021-08-12 19:33:38,161 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) [2021-08-12 19:33:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 57 transitions. [2021-08-12 19:33:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-12 19:33:38,163 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:38,163 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:38,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:33:38,163 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:38,167 INFO L82 PathProgramCache]: Analyzing trace with hash -616411682, now seen corresponding path program 1 times [2021-08-12 19:33:38,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:38,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227347856] [2021-08-12 19:33:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:38,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:38,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:38,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227347856] [2021-08-12 19:33:38,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227347856] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:33:38,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:33:38,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-12 19:33:38,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51886709] [2021-08-12 19:33:38,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:33:38,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:33:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:33:38,208 INFO L87 Difference]: Start difference. First operand 30 states and 57 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:38,229 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2021-08-12 19:33:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:33:38,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-12 19:33:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:38,231 INFO L225 Difference]: With dead ends: 52 [2021-08-12 19:33:38,231 INFO L226 Difference]: Without dead ends: 31 [2021-08-12 19:33:38,233 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:33:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-12 19:33:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-12 19:33:38,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 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) [2021-08-12 19:33:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 56 transitions. [2021-08-12 19:33:38,241 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 56 transitions. Word has length 12 [2021-08-12 19:33:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:38,241 INFO L482 AbstractCegarLoop]: Abstraction has 31 states and 56 transitions. [2021-08-12 19:33:38,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 56 transitions. [2021-08-12 19:33:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:33:38,242 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:38,242 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:38,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:33:38,242 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1444335643, now seen corresponding path program 1 times [2021-08-12 19:33:38,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:38,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593250233] [2021-08-12 19:33:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:38,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:38,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593250233] [2021-08-12 19:33:38,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593250233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:38,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740628952] [2021-08-12 19:33:38,295 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) [2021-08-12 19:33:38,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:38,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 19:33:38,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:38,487 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 16 treesize of output 10 [2021-08-12 19:33:38,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:38,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:38,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:38,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:7 [2021-08-12 19:33:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:38,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740628952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:38,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:38,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-12 19:33:38,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563866063] [2021-08-12 19:33:38,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:33:38,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:33:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:33:38,530 INFO L87 Difference]: Start difference. First operand 31 states and 56 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:38,574 INFO L93 Difference]: Finished difference Result 54 states and 103 transitions. [2021-08-12 19:33:38,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:33:38,578 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:33:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:38,579 INFO L225 Difference]: With dead ends: 54 [2021-08-12 19:33:38,579 INFO L226 Difference]: Without dead ends: 41 [2021-08-12 19:33:38,579 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:33:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-12 19:33:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-08-12 19:33:38,590 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) [2021-08-12 19:33:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-08-12 19:33:38,591 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 15 [2021-08-12 19:33:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:38,591 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-08-12 19:33:38,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-08-12 19:33:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-12 19:33:38,592 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:38,592 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:38,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 19:33:38,813 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:38,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:38,814 INFO L82 PathProgramCache]: Analyzing trace with hash -559632325, now seen corresponding path program 1 times [2021-08-12 19:33:38,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:38,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239659666] [2021-08-12 19:33:38,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:38,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:38,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239659666] [2021-08-12 19:33:38,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239659666] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:33:38,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:33:38,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:33:38,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352570695] [2021-08-12 19:33:38,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-12 19:33:38,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:38,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-12 19:33:38,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-12 19:33:38,836 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:38,843 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2021-08-12 19:33:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-12 19:33:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-12 19:33:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:38,844 INFO L225 Difference]: With dead ends: 64 [2021-08-12 19:33:38,844 INFO L226 Difference]: Without dead ends: 40 [2021-08-12 19:33:38,848 INFO L806 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 [2021-08-12 19:33:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-12 19:33:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-08-12 19:33:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 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) [2021-08-12 19:33:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2021-08-12 19:33:38,851 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 15 [2021-08-12 19:33:38,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:38,852 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2021-08-12 19:33:38,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2021-08-12 19:33:38,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-12 19:33:38,852 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:38,852 INFO L550 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:38,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 19:33:38,852 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:38,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:38,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1654899146, now seen corresponding path program 2 times [2021-08-12 19:33:38,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:38,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452892180] [2021-08-12 19:33:38,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:38,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:38,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452892180] [2021-08-12 19:33:38,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452892180] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:33:38,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:33:38,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:33:38,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628656759] [2021-08-12 19:33:38,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:33:38,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:33:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:33:38,877 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-08-12 19:33:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:38,894 INFO L93 Difference]: Finished difference Result 104 states and 206 transitions. [2021-08-12 19:33:38,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:33:38,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 [2021-08-12 19:33:38,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:38,895 INFO L225 Difference]: With dead ends: 104 [2021-08-12 19:33:38,896 INFO L226 Difference]: Without dead ends: 84 [2021-08-12 19:33:38,896 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:33:38,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-12 19:33:38,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-08-12 19:33:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:38,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-08-12 19:33:38,901 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 16 [2021-08-12 19:33:38,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:38,901 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-08-12 19:33:38,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-08-12 19:33:38,901 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-08-12 19:33:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:33:38,901 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:38,902 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:38,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 19:33:38,902 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:38,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1100878499, now seen corresponding path program 3 times [2021-08-12 19:33:38,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:38,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556236051] [2021-08-12 19:33:38,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:38,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:38,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556236051] [2021-08-12 19:33:38,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556236051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:38,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528878642] [2021-08-12 19:33:38,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-12 19:33:38,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:33:38,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:38,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:38,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:39,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:39,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528878642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:39,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:39,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-12 19:33:39,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321964531] [2021-08-12 19:33:39,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:33:39,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:39,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:33:39,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:33:39,016 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:39,029 INFO L93 Difference]: Finished difference Result 124 states and 266 transitions. [2021-08-12 19:33:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:33:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-12 19:33:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:39,030 INFO L225 Difference]: With dead ends: 124 [2021-08-12 19:33:39,030 INFO L226 Difference]: Without dead ends: 79 [2021-08-12 19:33:39,030 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:33:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-12 19:33:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-08-12 19:33:39,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-08-12 19:33:39,035 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 19 [2021-08-12 19:33:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:39,035 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-08-12 19:33:39,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-08-12 19:33:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:33:39,036 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:39,036 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:39,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:39,249 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash -903089469, now seen corresponding path program 1 times [2021-08-12 19:33:39,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:39,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030489135] [2021-08-12 19:33:39,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:39,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:39,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:39,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:39,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030489135] [2021-08-12 19:33:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030489135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:39,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562829655] [2021-08-12 19:33:39,362 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 [2021-08-12 19:33:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:33:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:39,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:39,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:39,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:39,516 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 37 treesize of output 19 [2021-08-12 19:33:39,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:39,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:39,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:39,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:7 [2021-08-12 19:33:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:39,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562829655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:39,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:39,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-12 19:33:39,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81133662] [2021-08-12 19:33:39,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:33:39,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:33:39,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:33:39,540 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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) [2021-08-12 19:33:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:39,598 INFO L93 Difference]: Finished difference Result 108 states and 222 transitions. [2021-08-12 19:33:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:33:39,599 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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 19 [2021-08-12 19:33:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:39,600 INFO L225 Difference]: With dead ends: 108 [2021-08-12 19:33:39,600 INFO L226 Difference]: Without dead ends: 89 [2021-08-12 19:33:39,600 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:33:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-12 19:33:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2021-08-12 19:33:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-08-12 19:33:39,605 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 19 [2021-08-12 19:33:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:39,605 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-08-12 19:33:39,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 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) [2021-08-12 19:33:39,605 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-08-12 19:33:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-12 19:33:39,605 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:39,605 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:39,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:39,821 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:39,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1021604339, now seen corresponding path program 2 times [2021-08-12 19:33:39,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:39,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138945804] [2021-08-12 19:33:39,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:39,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:39,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138945804] [2021-08-12 19:33:39,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138945804] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:39,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595753622] [2021-08-12 19:33:39,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:33:39,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:39,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 19:33:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:40,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-12 19:33:40,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2021-08-12 19:33:40,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:40,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:40,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:40,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:7 [2021-08-12 19:33:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:40,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595753622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:40,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:40,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-12 19:33:40,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333045969] [2021-08-12 19:33:40,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:33:40,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:33:40,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:33:40,053 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-08-12 19:33:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:40,092 INFO L93 Difference]: Finished difference Result 113 states and 226 transitions. [2021-08-12 19:33:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:33:40,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 19 [2021-08-12 19:33:40,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:40,093 INFO L225 Difference]: With dead ends: 113 [2021-08-12 19:33:40,093 INFO L226 Difference]: Without dead ends: 96 [2021-08-12 19:33:40,093 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:33:40,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-12 19:33:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2021-08-12 19:33:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 163 transitions. [2021-08-12 19:33:40,105 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 163 transitions. Word has length 19 [2021-08-12 19:33:40,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:40,105 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 163 transitions. [2021-08-12 19:33:40,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2021-08-12 19:33:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 163 transitions. [2021-08-12 19:33:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-12 19:33:40,108 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:40,108 INFO L550 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:40,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:40,329 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1435130610, now seen corresponding path program 3 times [2021-08-12 19:33:40,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:40,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615324860] [2021-08-12 19:33:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:40,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615324860] [2021-08-12 19:33:40,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615324860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805979915] [2021-08-12 19:33:40,368 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 [2021-08-12 19:33:40,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:33:40,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:40,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:33:40,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:40,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805979915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:40,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:40,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-08-12 19:33:40,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137905378] [2021-08-12 19:33:40,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 19:33:40,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:40,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 19:33:40,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:33:40,443 INFO L87 Difference]: Start difference. First operand 82 states and 163 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:40,470 INFO L93 Difference]: Finished difference Result 202 states and 403 transitions. [2021-08-12 19:33:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:33:40,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-12 19:33:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:40,471 INFO L225 Difference]: With dead ends: 202 [2021-08-12 19:33:40,471 INFO L226 Difference]: Without dead ends: 175 [2021-08-12 19:33:40,472 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-12 19:33:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-12 19:33:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 100. [2021-08-12 19:33:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.090909090909091) internal successors, (207), 99 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 207 transitions. [2021-08-12 19:33:40,480 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 207 transitions. Word has length 20 [2021-08-12 19:33:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:40,480 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 207 transitions. [2021-08-12 19:33:40,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 207 transitions. [2021-08-12 19:33:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:33:40,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:40,482 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:40,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:40,700 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1953390261, now seen corresponding path program 4 times [2021-08-12 19:33:40,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:40,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568306733] [2021-08-12 19:33:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:40,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:40,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568306733] [2021-08-12 19:33:40,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568306733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:40,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589921053] [2021-08-12 19:33:40,858 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 [2021-08-12 19:33:40,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:40,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:33:40,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:41,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:41,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:41,049 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 54 treesize of output 24 [2021-08-12 19:33:41,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:41,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:41,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:41,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-08-12 19:33:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:41,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589921053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:41,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:41,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 19:33:41,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505800568] [2021-08-12 19:33:41,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:33:41,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:33:41,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:33:41,071 INFO L87 Difference]: Start difference. First operand 100 states and 207 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:41,183 INFO L93 Difference]: Finished difference Result 231 states and 474 transitions. [2021-08-12 19:33:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:33:41,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:33:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:41,185 INFO L225 Difference]: With dead ends: 231 [2021-08-12 19:33:41,185 INFO L226 Difference]: Without dead ends: 158 [2021-08-12 19:33:41,187 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:33:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-08-12 19:33:41,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 124. [2021-08-12 19:33:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.048780487804878) internal successors, (252), 123 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 252 transitions. [2021-08-12 19:33:41,193 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 252 transitions. Word has length 23 [2021-08-12 19:33:41,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:41,193 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 252 transitions. [2021-08-12 19:33:41,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 252 transitions. [2021-08-12 19:33:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:33:41,194 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:41,194 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:41,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:41,402 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:41,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash -39199557, now seen corresponding path program 5 times [2021-08-12 19:33:41,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:41,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010783665] [2021-08-12 19:33:41,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:41,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:41,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010783665] [2021-08-12 19:33:41,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010783665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:41,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406283557] [2021-08-12 19:33:41,537 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 [2021-08-12 19:33:41,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:33:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:33:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:41,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:41,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:41,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:41,719 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 54 treesize of output 24 [2021-08-12 19:33:41,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:41,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:41,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:41,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-08-12 19:33:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:41,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406283557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:41,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:41,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 19:33:41,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725316385] [2021-08-12 19:33:41,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:33:41,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:41,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:33:41,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:33:41,741 INFO L87 Difference]: Start difference. First operand 124 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:41,848 INFO L93 Difference]: Finished difference Result 244 states and 513 transitions. [2021-08-12 19:33:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:33:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-12 19:33:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:41,851 INFO L225 Difference]: With dead ends: 244 [2021-08-12 19:33:41,851 INFO L226 Difference]: Without dead ends: 207 [2021-08-12 19:33:41,851 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 160.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:33:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-12 19:33:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 127. [2021-08-12 19:33:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0476190476190474) internal successors, (258), 126 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 258 transitions. [2021-08-12 19:33:41,857 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 258 transitions. Word has length 23 [2021-08-12 19:33:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:41,857 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 258 transitions. [2021-08-12 19:33:41,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 258 transitions. [2021-08-12 19:33:41,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:33:41,859 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:41,859 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:42,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:42,075 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:42,076 INFO L82 PathProgramCache]: Analyzing trace with hash -493418373, now seen corresponding path program 6 times [2021-08-12 19:33:42,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:42,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436357780] [2021-08-12 19:33:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:42,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:42,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436357780] [2021-08-12 19:33:42,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436357780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:42,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364637665] [2021-08-12 19:33:42,195 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 [2021-08-12 19:33:42,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:33:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:42,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:33:42,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:42,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:42,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:42,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:42,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:42,347 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 54 treesize of output 24 [2021-08-12 19:33:42,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:42,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:42,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:42,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-08-12 19:33:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:42,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364637665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:42,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:42,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-12 19:33:42,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843257418] [2021-08-12 19:33:42,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:33:42,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:33:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:33:42,368 INFO L87 Difference]: Start difference. First operand 127 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:42,544 INFO L93 Difference]: Finished difference Result 372 states and 750 transitions. [2021-08-12 19:33:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:33:42,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:33:42,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:42,548 INFO L225 Difference]: With dead ends: 372 [2021-08-12 19:33:42,548 INFO L226 Difference]: Without dead ends: 231 [2021-08-12 19:33:42,549 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:33:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-08-12 19:33:42,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-08-12 19:33:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0217391304347827) internal successors, (279), 138 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:42,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 279 transitions. [2021-08-12 19:33:42,556 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 279 transitions. Word has length 23 [2021-08-12 19:33:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:42,556 INFO L482 AbstractCegarLoop]: Abstraction has 139 states and 279 transitions. [2021-08-12 19:33:42,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 279 transitions. [2021-08-12 19:33:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:33:42,557 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:42,557 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:42,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-12 19:33:42,757 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:42,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1420772331, now seen corresponding path program 7 times [2021-08-12 19:33:42,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:42,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710576521] [2021-08-12 19:33:42,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:42,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:42,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:42,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710576521] [2021-08-12 19:33:42,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710576521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:42,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591019676] [2021-08-12 19:33:42,873 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 [2021-08-12 19:33:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:33:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:43,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:43,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:43,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:43,021 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 54 treesize of output 24 [2021-08-12 19:33:43,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:43,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:43,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:43,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-08-12 19:33:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:43,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591019676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:43,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:43,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-12 19:33:43,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136265469] [2021-08-12 19:33:43,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:33:43,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:43,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:33:43,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:33:43,037 INFO L87 Difference]: Start difference. First operand 139 states and 279 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:43,157 INFO L93 Difference]: Finished difference Result 298 states and 631 transitions. [2021-08-12 19:33:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:33:43,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:33:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:43,159 INFO L225 Difference]: With dead ends: 298 [2021-08-12 19:33:43,159 INFO L226 Difference]: Without dead ends: 244 [2021-08-12 19:33:43,159 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:33:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-12 19:33:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 115. [2021-08-12 19:33:43,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0526315789473686) internal successors, (234), 114 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:43,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 234 transitions. [2021-08-12 19:33:43,165 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 234 transitions. Word has length 23 [2021-08-12 19:33:43,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:43,165 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 234 transitions. [2021-08-12 19:33:43,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 234 transitions. [2021-08-12 19:33:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-12 19:33:43,166 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:43,166 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:43,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:43,377 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash 631142011, now seen corresponding path program 8 times [2021-08-12 19:33:43,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:43,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67779626] [2021-08-12 19:33:43,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:43,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:43,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:43,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67779626] [2021-08-12 19:33:43,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67779626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:43,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134216886] [2021-08-12 19:33:43,487 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 [2021-08-12 19:33:43,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:43,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-12 19:33:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:43,608 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-12 19:33:43,608 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 54 treesize of output 24 [2021-08-12 19:33:43,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:43,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:43,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:43,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:7 [2021-08-12 19:33:43,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:43,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134216886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:43,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:43,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-12 19:33:43,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948134803] [2021-08-12 19:33:43,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:33:43,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:43,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:33:43,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:33:43,624 INFO L87 Difference]: Start difference. First operand 115 states and 234 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:43,716 INFO L93 Difference]: Finished difference Result 176 states and 357 transitions. [2021-08-12 19:33:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:33:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:33:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:43,718 INFO L225 Difference]: With dead ends: 176 [2021-08-12 19:33:43,718 INFO L226 Difference]: Without dead ends: 159 [2021-08-12 19:33:43,718 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:33:43,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-12 19:33:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2021-08-12 19:33:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.0578512396694215) internal successors, (249), 121 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) [2021-08-12 19:33:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 249 transitions. [2021-08-12 19:33:43,724 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 249 transitions. Word has length 23 [2021-08-12 19:33:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:43,724 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 249 transitions. [2021-08-12 19:33:43,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:43,724 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 249 transitions. [2021-08-12 19:33:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-12 19:33:43,724 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:43,724 INFO L550 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:43,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:43,937 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2079266966, now seen corresponding path program 9 times [2021-08-12 19:33:43,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:43,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537743235] [2021-08-12 19:33:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:43,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537743235] [2021-08-12 19:33:43,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537743235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:43,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859035766] [2021-08-12 19:33:43,968 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 [2021-08-12 19:33:43,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:33:43,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:43,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-12 19:33:43,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:44,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859035766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:44,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:44,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-12 19:33:44,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167084262] [2021-08-12 19:33:44,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:33:44,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:44,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:33:44,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:33:44,037 INFO L87 Difference]: Start difference. First operand 122 states and 249 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:44,086 INFO L93 Difference]: Finished difference Result 282 states and 569 transitions. [2021-08-12 19:33:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:33:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-12 19:33:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:44,088 INFO L225 Difference]: With dead ends: 282 [2021-08-12 19:33:44,088 INFO L226 Difference]: Without dead ends: 254 [2021-08-12 19:33:44,088 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:33:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-12 19:33:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 144. [2021-08-12 19:33:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.104895104895105) internal successors, (301), 143 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 301 transitions. [2021-08-12 19:33:44,096 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 301 transitions. Word has length 24 [2021-08-12 19:33:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:44,096 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 301 transitions. [2021-08-12 19:33:44,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 301 transitions. [2021-08-12 19:33:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:44,097 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:44,097 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:44,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:33:44,313 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash 573026147, now seen corresponding path program 10 times [2021-08-12 19:33:44,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:44,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622125013] [2021-08-12 19:33:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-12 19:33:44,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622125013] [2021-08-12 19:33:44,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622125013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:44,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824583985] [2021-08-12 19:33:44,460 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 [2021-08-12 19:33:44,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:44,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:44,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:44,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:44,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:44,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:44,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:44,694 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 73 treesize of output 31 [2021-08-12 19:33:44,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:44,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:44,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:44,702 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-08-12 19:33:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:44,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824583985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:44,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:44,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-12 19:33:44,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459346505] [2021-08-12 19:33:44,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:33:44,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:44,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:33:44,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:33:44,714 INFO L87 Difference]: Start difference. First operand 144 states and 301 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-12 19:33:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:44,904 INFO L93 Difference]: Finished difference Result 414 states and 845 transitions. [2021-08-12 19:33:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:33:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-08-12 19:33:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:44,907 INFO L225 Difference]: With dead ends: 414 [2021-08-12 19:33:44,907 INFO L226 Difference]: Without dead ends: 275 [2021-08-12 19:33:44,907 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:33:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-08-12 19:33:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 186. [2021-08-12 19:33:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.0324324324324325) internal successors, (376), 185 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:44,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 376 transitions. [2021-08-12 19:33:44,918 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 376 transitions. Word has length 27 [2021-08-12 19:33:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:44,918 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 376 transitions. [2021-08-12 19:33:44,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-12 19:33:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 376 transitions. [2021-08-12 19:33:44,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:44,918 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:44,918 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:45,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 19:33:45,135 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:45,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:45,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1797247341, now seen corresponding path program 11 times [2021-08-12 19:33:45,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:45,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593027336] [2021-08-12 19:33:45,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:45,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:45,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593027336] [2021-08-12 19:33:45,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593027336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:45,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154018554] [2021-08-12 19:33:45,253 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 [2021-08-12 19:33:45,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:33:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:45,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:45,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:45,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:45,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:45,499 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 73 treesize of output 31 [2021-08-12 19:33:45,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:45,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:45,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:45,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-08-12 19:33:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:45,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154018554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:45,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:45,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-12 19:33:45,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779766552] [2021-08-12 19:33:45,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:33:45,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:45,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:33:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:33:45,521 INFO L87 Difference]: Start difference. First operand 186 states and 376 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-12 19:33:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:45,646 INFO L93 Difference]: Finished difference Result 451 states and 952 transitions. [2021-08-12 19:33:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:33:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 27 [2021-08-12 19:33:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:45,648 INFO L225 Difference]: With dead ends: 451 [2021-08-12 19:33:45,648 INFO L226 Difference]: Without dead ends: 397 [2021-08-12 19:33:45,648 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:33:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-08-12 19:33:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 204. [2021-08-12 19:33:45,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-08-12 19:33:45,661 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-08-12 19:33:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:45,661 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-08-12 19:33:45,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-08-12 19:33:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-08-12 19:33:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:45,661 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:45,661 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:45,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 19:33:45,869 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:45,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2033685859, now seen corresponding path program 12 times [2021-08-12 19:33:45,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:45,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150470944] [2021-08-12 19:33:45,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:46,018 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:46,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:46,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150470944] [2021-08-12 19:33:46,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150470944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:46,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262918087] [2021-08-12 19:33:46,018 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 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 [2021-08-12 19:33:46,042 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:33:46,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:46,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:46,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:46,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:46,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:46,249 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 73 treesize of output 31 [2021-08-12 19:33:46,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:46,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:46,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:46,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-08-12 19:33:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:46,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262918087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:46,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:46,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-12 19:33:46,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76536028] [2021-08-12 19:33:46,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:33:46,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:46,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:33:46,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:33:46,265 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-08-12 19:33:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:46,456 INFO L93 Difference]: Finished difference Result 420 states and 872 transitions. [2021-08-12 19:33:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:33:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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 27 [2021-08-12 19:33:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:46,458 INFO L225 Difference]: With dead ends: 420 [2021-08-12 19:33:46,458 INFO L226 Difference]: Without dead ends: 381 [2021-08-12 19:33:46,458 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 240.0ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:33:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-08-12 19:33:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 204. [2021-08-12 19:33:46,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.0295566502463056) internal successors, (412), 203 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:46,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 412 transitions. [2021-08-12 19:33:46,472 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 412 transitions. Word has length 27 [2021-08-12 19:33:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:46,472 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 412 transitions. [2021-08-12 19:33:46,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 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) [2021-08-12 19:33:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 412 transitions. [2021-08-12 19:33:46,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:46,473 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:46,473 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:46,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:46,689 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash 482737811, now seen corresponding path program 13 times [2021-08-12 19:33:46,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:46,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111648712] [2021-08-12 19:33:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:46,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:46,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111648712] [2021-08-12 19:33:46,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111648712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:46,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410112283] [2021-08-12 19:33:46,827 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 [2021-08-12 19:33:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:47,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:47,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:47,040 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 73 treesize of output 31 [2021-08-12 19:33:47,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:47,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:47,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:47,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-08-12 19:33:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410112283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:47,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:47,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-08-12 19:33:47,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637893003] [2021-08-12 19:33:47,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:33:47,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:33:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:33:47,058 INFO L87 Difference]: Start difference. First operand 204 states and 412 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-08-12 19:33:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:47,370 INFO L93 Difference]: Finished difference Result 609 states and 1227 transitions. [2021-08-12 19:33:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:33:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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 27 [2021-08-12 19:33:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:47,372 INFO L225 Difference]: With dead ends: 609 [2021-08-12 19:33:47,372 INFO L226 Difference]: Without dead ends: 443 [2021-08-12 19:33:47,373 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:33:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-08-12 19:33:47,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 261. [2021-08-12 19:33:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.9923076923076923) internal successors, (518), 260 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 518 transitions. [2021-08-12 19:33:47,392 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 518 transitions. Word has length 27 [2021-08-12 19:33:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:47,392 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 518 transitions. [2021-08-12 19:33:47,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 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) [2021-08-12 19:33:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 518 transitions. [2021-08-12 19:33:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:47,393 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:47,393 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:47,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:47,609 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1943397523, now seen corresponding path program 14 times [2021-08-12 19:33:47,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:47,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288226641] [2021-08-12 19:33:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:47,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288226641] [2021-08-12 19:33:47,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288226641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:47,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35198260] [2021-08-12 19:33:47,728 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 [2021-08-12 19:33:47,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:47,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:47,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:47,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:47,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:47,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:47,961 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 73 treesize of output 31 [2021-08-12 19:33:47,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:47,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:47,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:47,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-08-12 19:33:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:47,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35198260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:47,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:47,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-12 19:33:47,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230416080] [2021-08-12 19:33:47,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:33:47,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:47,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:33:47,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:33:47,978 INFO L87 Difference]: Start difference. First operand 261 states and 518 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-08-12 19:33:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:48,238 INFO L93 Difference]: Finished difference Result 568 states and 1157 transitions. [2021-08-12 19:33:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:33:48,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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 27 [2021-08-12 19:33:48,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:48,240 INFO L225 Difference]: With dead ends: 568 [2021-08-12 19:33:48,240 INFO L226 Difference]: Without dead ends: 514 [2021-08-12 19:33:48,241 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:33:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-08-12 19:33:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 291. [2021-08-12 19:33:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.9758620689655173) internal successors, (573), 290 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 573 transitions. [2021-08-12 19:33:48,266 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 573 transitions. Word has length 27 [2021-08-12 19:33:48,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:48,266 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 573 transitions. [2021-08-12 19:33:48,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 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) [2021-08-12 19:33:48,266 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 573 transitions. [2021-08-12 19:33:48,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:48,267 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:48,267 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:48,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:48,480 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:48,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1497798365, now seen corresponding path program 15 times [2021-08-12 19:33:48,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:48,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511922266] [2021-08-12 19:33:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:48,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:48,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511922266] [2021-08-12 19:33:48,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511922266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:48,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82166258] [2021-08-12 19:33:48,602 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 [2021-08-12 19:33:48,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:33:48,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:48,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:48,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:48,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:48,875 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 67 treesize of output 31 [2021-08-12 19:33:48,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:48,889 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-08-12 19:33:48,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:48,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:88, output treesize:7 [2021-08-12 19:33:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:48,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82166258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:48,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:48,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-08-12 19:33:48,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545738781] [2021-08-12 19:33:48,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:33:48,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:33:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:33:48,899 INFO L87 Difference]: Start difference. First operand 291 states and 573 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-08-12 19:33:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:49,353 INFO L93 Difference]: Finished difference Result 621 states and 1242 transitions. [2021-08-12 19:33:49,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:33:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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 27 [2021-08-12 19:33:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:49,355 INFO L225 Difference]: With dead ends: 621 [2021-08-12 19:33:49,355 INFO L226 Difference]: Without dead ends: 501 [2021-08-12 19:33:49,356 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:49,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-08-12 19:33:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 321. [2021-08-12 19:33:49,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-08-12 19:33:49,379 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-08-12 19:33:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:49,379 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-08-12 19:33:49,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 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) [2021-08-12 19:33:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-08-12 19:33:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:49,379 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:49,380 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:49,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 19:33:49,597 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash -37138653, now seen corresponding path program 16 times [2021-08-12 19:33:49,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:49,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929299285] [2021-08-12 19:33:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:49,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:49,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929299285] [2021-08-12 19:33:49,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929299285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:49,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500226784] [2021-08-12 19:33:49,711 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 [2021-08-12 19:33:49,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:49,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:49,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:33:49,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:49,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:49,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:49,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:49,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:49,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:49,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:49,903 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 73 treesize of output 31 [2021-08-12 19:33:49,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:49,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:49,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:49,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-08-12 19:33:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:49,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500226784] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:49,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:49,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-12 19:33:49,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690911918] [2021-08-12 19:33:49,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:33:49,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:49,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:33:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:33:49,919 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-08-12 19:33:50,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:50,161 INFO L93 Difference]: Finished difference Result 633 states and 1288 transitions. [2021-08-12 19:33:50,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:33:50,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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 27 [2021-08-12 19:33:50,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:50,163 INFO L225 Difference]: With dead ends: 633 [2021-08-12 19:33:50,163 INFO L226 Difference]: Without dead ends: 579 [2021-08-12 19:33:50,163 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:33:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-12 19:33:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 321. [2021-08-12 19:33:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 1.971875) internal successors, (631), 320 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 631 transitions. [2021-08-12 19:33:50,187 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 631 transitions. Word has length 27 [2021-08-12 19:33:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:50,187 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 631 transitions. [2021-08-12 19:33:50,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 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) [2021-08-12 19:33:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 631 transitions. [2021-08-12 19:33:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:33:50,188 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:50,188 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:50,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-12 19:33:50,401 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:50,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1537293741, now seen corresponding path program 17 times [2021-08-12 19:33:50,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:50,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424609554] [2021-08-12 19:33:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:50,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:50,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424609554] [2021-08-12 19:33:50,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424609554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:50,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966872445] [2021-08-12 19:33:50,534 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 [2021-08-12 19:33:50,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:33:50,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:50,559 WARN L261 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-12 19:33:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:50,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:50,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:50,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:50,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:50,739 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 73 treesize of output 31 [2021-08-12 19:33:50,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:50,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:50,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:50,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:79, output treesize:7 [2021-08-12 19:33:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:50,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966872445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:50,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:50,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-12 19:33:50,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932484587] [2021-08-12 19:33:50,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:33:50,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:33:50,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:33:50,756 INFO L87 Difference]: Start difference. First operand 321 states and 631 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:51,037 INFO L93 Difference]: Finished difference Result 678 states and 1357 transitions. [2021-08-12 19:33:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:33:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:33:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:51,039 INFO L225 Difference]: With dead ends: 678 [2021-08-12 19:33:51,039 INFO L226 Difference]: Without dead ends: 498 [2021-08-12 19:33:51,040 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:33:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-08-12 19:33:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 355. [2021-08-12 19:33:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.9802259887005649) internal successors, (701), 354 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:51,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 701 transitions. [2021-08-12 19:33:51,069 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 701 transitions. Word has length 27 [2021-08-12 19:33:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:51,069 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 701 transitions. [2021-08-12 19:33:51,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:51,069 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 701 transitions. [2021-08-12 19:33:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:51,069 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:51,069 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:51,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:33:51,281 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash -326297685, now seen corresponding path program 18 times [2021-08-12 19:33:51,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:51,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433706476] [2021-08-12 19:33:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:51,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:51,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433706476] [2021-08-12 19:33:51,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433706476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:51,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736787058] [2021-08-12 19:33:51,431 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 [2021-08-12 19:33:51,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:33:51,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:51,459 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:33:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:51,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:51,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:51,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:51,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:51,747 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 90 treesize of output 36 [2021-08-12 19:33:51,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:51,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:51,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:51,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:33:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:51,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736787058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:51,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:51,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-12 19:33:51,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158702475] [2021-08-12 19:33:51,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:33:51,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:51,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:33:51,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:51,764 INFO L87 Difference]: Start difference. First operand 355 states and 701 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:33:52,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:52,079 INFO L93 Difference]: Finished difference Result 668 states and 1352 transitions. [2021-08-12 19:33:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:33:52,079 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 31 [2021-08-12 19:33:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:52,081 INFO L225 Difference]: With dead ends: 668 [2021-08-12 19:33:52,081 INFO L226 Difference]: Without dead ends: 629 [2021-08-12 19:33:52,081 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-12 19:33:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 364. [2021-08-12 19:33:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.9724517906336088) internal successors, (716), 363 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 716 transitions. [2021-08-12 19:33:52,112 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 716 transitions. Word has length 31 [2021-08-12 19:33:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:52,112 INFO L482 AbstractCegarLoop]: Abstraction has 364 states and 716 transitions. [2021-08-12 19:33:52,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:33:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 716 transitions. [2021-08-12 19:33:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:52,113 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:52,113 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:52,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 19:33:52,317 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 656635163, now seen corresponding path program 19 times [2021-08-12 19:33:52,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:52,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669379289] [2021-08-12 19:33:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:52,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669379289] [2021-08-12 19:33:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669379289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:52,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146575509] [2021-08-12 19:33:52,461 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 [2021-08-12 19:33:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:52,485 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:33:52,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:52,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:52,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:52,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:52,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:52,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:52,740 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 90 treesize of output 36 [2021-08-12 19:33:52,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:52,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:52,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:52,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:33:52,760 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:52,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146575509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:52,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:52,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-12 19:33:52,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171725210] [2021-08-12 19:33:52,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:33:52,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:52,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:33:52,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:33:52,762 INFO L87 Difference]: Start difference. First operand 364 states and 716 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:33:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:53,199 INFO L93 Difference]: Finished difference Result 561 states and 1117 transitions. [2021-08-12 19:33:53,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:33:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 31 [2021-08-12 19:33:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:53,202 INFO L225 Difference]: With dead ends: 561 [2021-08-12 19:33:53,202 INFO L226 Difference]: Without dead ends: 532 [2021-08-12 19:33:53,202 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:33:53,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-08-12 19:33:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 332. [2021-08-12 19:33:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.9667673716012084) internal successors, (651), 331 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 651 transitions. [2021-08-12 19:33:53,239 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 651 transitions. Word has length 31 [2021-08-12 19:33:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:53,239 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 651 transitions. [2021-08-12 19:33:53,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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) [2021-08-12 19:33:53,239 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 651 transitions. [2021-08-12 19:33:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:53,239 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:53,239 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:53,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 19:33:53,453 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1781195547, now seen corresponding path program 20 times [2021-08-12 19:33:53,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:53,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933758523] [2021-08-12 19:33:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:53,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:53,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933758523] [2021-08-12 19:33:53,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933758523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:53,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829809399] [2021-08-12 19:33:53,587 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 [2021-08-12 19:33:53,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:33:53,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:53,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:33:53,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:53,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:53,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:53,894 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 90 treesize of output 36 [2021-08-12 19:33:53,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:53,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:53,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:53,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:33:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829809399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:53,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:53,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-12 19:33:53,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025135333] [2021-08-12 19:33:53,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:33:53,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:53,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:33:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:53,910 INFO L87 Difference]: Start difference. First operand 332 states and 651 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:33:54,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:54,311 INFO L93 Difference]: Finished difference Result 726 states and 1491 transitions. [2021-08-12 19:33:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:33:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 31 [2021-08-12 19:33:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:54,314 INFO L225 Difference]: With dead ends: 726 [2021-08-12 19:33:54,314 INFO L226 Difference]: Without dead ends: 666 [2021-08-12 19:33:54,315 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 293.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-08-12 19:33:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 287. [2021-08-12 19:33:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.013986013986014) internal successors, (576), 286 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 576 transitions. [2021-08-12 19:33:54,346 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 576 transitions. Word has length 31 [2021-08-12 19:33:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:54,347 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 576 transitions. [2021-08-12 19:33:54,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:33:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 576 transitions. [2021-08-12 19:33:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:54,347 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:54,347 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:54,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:54,561 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1328876565, now seen corresponding path program 21 times [2021-08-12 19:33:54,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:54,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636506438] [2021-08-12 19:33:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636506438] [2021-08-12 19:33:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636506438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929724207] [2021-08-12 19:33:54,754 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 [2021-08-12 19:33:54,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:33:54,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:54,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:33:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:55,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:55,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:55,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:55,041 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 90 treesize of output 36 [2021-08-12 19:33:55,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:55,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:55,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:55,049 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:33:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:55,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929724207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:55,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:55,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-12 19:33:55,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869715607] [2021-08-12 19:33:55,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:33:55,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:55,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:33:55,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:55,059 INFO L87 Difference]: Start difference. First operand 287 states and 576 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:33:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:55,438 INFO L93 Difference]: Finished difference Result 702 states and 1422 transitions. [2021-08-12 19:33:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:33:55,438 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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 31 [2021-08-12 19:33:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:55,440 INFO L225 Difference]: With dead ends: 702 [2021-08-12 19:33:55,440 INFO L226 Difference]: Without dead ends: 523 [2021-08-12 19:33:55,441 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:33:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-08-12 19:33:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 326. [2021-08-12 19:33:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 1.9938461538461538) internal successors, (648), 325 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 648 transitions. [2021-08-12 19:33:55,476 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 648 transitions. Word has length 31 [2021-08-12 19:33:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:55,476 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 648 transitions. [2021-08-12 19:33:55,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 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) [2021-08-12 19:33:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 648 transitions. [2021-08-12 19:33:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:55,476 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:55,476 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:55,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 19:33:55,692 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -204316181, now seen corresponding path program 22 times [2021-08-12 19:33:55,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:55,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072478595] [2021-08-12 19:33:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:55,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:55,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072478595] [2021-08-12 19:33:55,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072478595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:55,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045756838] [2021-08-12 19:33:55,842 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 [2021-08-12 19:33:55,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:33:55,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:55,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:33:55,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:56,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:56,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:56,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:56,333 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 90 treesize of output 36 [2021-08-12 19:33:56,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:56,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:56,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:56,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:33:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:56,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045756838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:56,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:56,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-12 19:33:56,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818983760] [2021-08-12 19:33:56,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:33:56,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:56,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:33:56,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:33:56,350 INFO L87 Difference]: Start difference. First operand 326 states and 648 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-08-12 19:33:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:56,761 INFO L93 Difference]: Finished difference Result 674 states and 1395 transitions. [2021-08-12 19:33:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:33:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 31 [2021-08-12 19:33:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:56,764 INFO L225 Difference]: With dead ends: 674 [2021-08-12 19:33:56,764 INFO L226 Difference]: Without dead ends: 617 [2021-08-12 19:33:56,764 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:33:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-12 19:33:56,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 293. [2021-08-12 19:33:56,801 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) [2021-08-12 19:33:56,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-08-12 19:33:56,802 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 31 [2021-08-12 19:33:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:56,802 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-08-12 19:33:56,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-08-12 19:33:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-08-12 19:33:56,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:56,803 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:56,803 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:57,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:33:57,007 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1086947675, now seen corresponding path program 23 times [2021-08-12 19:33:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:57,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701210967] [2021-08-12 19:33:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:57,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:57,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701210967] [2021-08-12 19:33:57,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701210967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:57,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419163263] [2021-08-12 19:33:57,145 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 [2021-08-12 19:33:57,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:33:57,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:57,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-12 19:33:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:57,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:57,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:57,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:57,494 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 64 treesize of output 28 [2021-08-12 19:33:57,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:57,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:57,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:57,501 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:3 [2021-08-12 19:33:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:57,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419163263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:57,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:57,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-12 19:33:57,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118875459] [2021-08-12 19:33:57,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:33:57,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:33:57,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:33:57,526 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:58,654 INFO L93 Difference]: Finished difference Result 727 states and 1479 transitions. [2021-08-12 19:33:58,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:33:58,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:33:58,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:58,656 INFO L225 Difference]: With dead ends: 727 [2021-08-12 19:33:58,656 INFO L226 Difference]: Without dead ends: 485 [2021-08-12 19:33:58,657 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 811.5ms TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:33:58,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-08-12 19:33:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 323. [2021-08-12 19:33:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.9968944099378882) internal successors, (643), 322 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 643 transitions. [2021-08-12 19:33:58,698 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 643 transitions. Word has length 31 [2021-08-12 19:33:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:58,698 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 643 transitions. [2021-08-12 19:33:58,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 643 transitions. [2021-08-12 19:33:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:58,699 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:58,699 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:33:58,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:33:58,900 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:33:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:33:58,900 INFO L82 PathProgramCache]: Analyzing trace with hash 407681163, now seen corresponding path program 24 times [2021-08-12 19:33:58,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:33:58,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129049973] [2021-08-12 19:33:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:33:58,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:33:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:59,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:33:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129049973] [2021-08-12 19:33:59,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129049973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:59,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772439027] [2021-08-12 19:33:59,064 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 [2021-08-12 19:33:59,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:33:59,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:33:59,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:33:59,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:33:59,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:59,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:59,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:33:59,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:33:59,359 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 90 treesize of output 36 [2021-08-12 19:33:59,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:33:59,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:33:59,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:33:59,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:33:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:33:59,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772439027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:33:59,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:33:59,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-12 19:33:59,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547395752] [2021-08-12 19:33:59,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:33:59,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:33:59,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:33:59,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:33:59,377 INFO L87 Difference]: Start difference. First operand 323 states and 643 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-08-12 19:33:59,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:33:59,920 INFO L93 Difference]: Finished difference Result 638 states and 1288 transitions. [2021-08-12 19:33:59,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:33:59,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 31 [2021-08-12 19:33:59,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:33:59,923 INFO L225 Difference]: With dead ends: 638 [2021-08-12 19:33:59,923 INFO L226 Difference]: Without dead ends: 591 [2021-08-12 19:33:59,923 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:33:59,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-08-12 19:33:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 305. [2021-08-12 19:33:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.0065789473684212) internal successors, (610), 304 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:33:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 610 transitions. [2021-08-12 19:33:59,965 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 610 transitions. Word has length 31 [2021-08-12 19:33:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:33:59,965 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 610 transitions. [2021-08-12 19:33:59,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-08-12 19:33:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 610 transitions. [2021-08-12 19:33:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:33:59,966 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:33:59,966 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:00,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:00,167 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:00,168 INFO L82 PathProgramCache]: Analyzing trace with hash -574822485, now seen corresponding path program 25 times [2021-08-12 19:34:00,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:00,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954902571] [2021-08-12 19:34:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:00,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954902571] [2021-08-12 19:34:00,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954902571] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:00,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100197210] [2021-08-12 19:34:00,342 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 [2021-08-12 19:34:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:00,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:00,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:00,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:00,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:00,588 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 90 treesize of output 36 [2021-08-12 19:34:00,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:00,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:00,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:00,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:34:00,621 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:00,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100197210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:00,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:00,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-08-12 19:34:00,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210057562] [2021-08-12 19:34:00,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:34:00,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:00,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:34:00,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:34:00,622 INFO L87 Difference]: Start difference. First operand 305 states and 610 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:01,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:01,183 INFO L93 Difference]: Finished difference Result 781 states and 1552 transitions. [2021-08-12 19:34:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:34:01,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:34:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:01,186 INFO L225 Difference]: With dead ends: 781 [2021-08-12 19:34:01,186 INFO L226 Difference]: Without dead ends: 565 [2021-08-12 19:34:01,186 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:34:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-08-12 19:34:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 352. [2021-08-12 19:34:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 1.9658119658119657) internal successors, (690), 351 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 690 transitions. [2021-08-12 19:34:01,235 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 690 transitions. Word has length 31 [2021-08-12 19:34:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:01,235 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 690 transitions. [2021-08-12 19:34:01,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 690 transitions. [2021-08-12 19:34:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:34:01,235 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:01,235 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:01,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 19:34:01,449 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1100362325, now seen corresponding path program 26 times [2021-08-12 19:34:01,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:01,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14716135] [2021-08-12 19:34:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:01,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14716135] [2021-08-12 19:34:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14716135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:01,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353124162] [2021-08-12 19:34:01,596 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 [2021-08-12 19:34:01,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:01,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:01,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:01,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:01,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:01,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:01,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:01,839 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 90 treesize of output 36 [2021-08-12 19:34:01,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:01,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:01,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:01,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:34:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:01,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353124162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:01,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:01,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 18 [2021-08-12 19:34:01,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368056595] [2021-08-12 19:34:01,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:34:01,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:34:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:34:01,855 INFO L87 Difference]: Start difference. First operand 352 states and 690 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:02,372 INFO L93 Difference]: Finished difference Result 733 states and 1424 transitions. [2021-08-12 19:34:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:34:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:34:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:02,374 INFO L225 Difference]: With dead ends: 733 [2021-08-12 19:34:02,374 INFO L226 Difference]: Without dead ends: 505 [2021-08-12 19:34:02,375 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 415.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:34:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-12 19:34:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-08-12 19:34:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.8725868725868726) internal successors, (485), 259 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 485 transitions. [2021-08-12 19:34:02,417 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 485 transitions. Word has length 31 [2021-08-12 19:34:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:02,417 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 485 transitions. [2021-08-12 19:34:02,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 485 transitions. [2021-08-12 19:34:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:34:02,417 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:02,417 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:02,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:02,621 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:02,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:02,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1315461915, now seen corresponding path program 27 times [2021-08-12 19:34:02,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758217666] [2021-08-12 19:34:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:02,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:02,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758217666] [2021-08-12 19:34:02,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758217666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:02,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067939852] [2021-08-12 19:34:02,783 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 [2021-08-12 19:34:02,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:34:02,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:02,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-12 19:34:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:03,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:03,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:03,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:03,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:03,128 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 90 treesize of output 36 [2021-08-12 19:34:03,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:03,143 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-08-12 19:34:03,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:03,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:110, output treesize:7 [2021-08-12 19:34:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:03,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067939852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:03,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:03,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-12 19:34:03,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528167440] [2021-08-12 19:34:03,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:34:03,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:03,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:34:03,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:34:03,154 INFO L87 Difference]: Start difference. First operand 260 states and 485 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:04,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:04,240 INFO L93 Difference]: Finished difference Result 882 states and 1744 transitions. [2021-08-12 19:34:04,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:34:04,241 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:34:04,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:04,243 INFO L225 Difference]: With dead ends: 882 [2021-08-12 19:34:04,243 INFO L226 Difference]: Without dead ends: 613 [2021-08-12 19:34:04,244 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 761.3ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:34:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-08-12 19:34:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 333. [2021-08-12 19:34:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.9216867469879517) internal successors, (638), 332 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 638 transitions. [2021-08-12 19:34:04,299 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 638 transitions. Word has length 31 [2021-08-12 19:34:04,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:04,299 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 638 transitions. [2021-08-12 19:34:04,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:04,299 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 638 transitions. [2021-08-12 19:34:04,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:34:04,299 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:04,299 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:04,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 19:34:04,500 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1773283547, now seen corresponding path program 28 times [2021-08-12 19:34:04,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:04,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65438775] [2021-08-12 19:34:04,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:04,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:04,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65438775] [2021-08-12 19:34:04,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65438775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:04,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063347774] [2021-08-12 19:34:04,668 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 [2021-08-12 19:34:04,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:34:04,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:04,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:04,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:04,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:04,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:04,889 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 90 treesize of output 36 [2021-08-12 19:34:04,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:04,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:04,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:04,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:34:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:04,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063347774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:04,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:04,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-08-12 19:34:04,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452516195] [2021-08-12 19:34:04,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:34:04,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:04,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:34:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:34:04,904 INFO L87 Difference]: Start difference. First operand 333 states and 638 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:05,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:05,586 INFO L93 Difference]: Finished difference Result 845 states and 1667 transitions. [2021-08-12 19:34:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:34:05,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:34:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:05,590 INFO L225 Difference]: With dead ends: 845 [2021-08-12 19:34:05,590 INFO L226 Difference]: Without dead ends: 610 [2021-08-12 19:34:05,591 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:34:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-08-12 19:34:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 402. [2021-08-12 19:34:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.887780548628429) internal successors, (757), 401 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 757 transitions. [2021-08-12 19:34:05,668 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 757 transitions. Word has length 31 [2021-08-12 19:34:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:05,668 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 757 transitions. [2021-08-12 19:34:05,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 757 transitions. [2021-08-12 19:34:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:34:05,669 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:05,669 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:05,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:05,869 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash -607493045, now seen corresponding path program 29 times [2021-08-12 19:34:05,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:05,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007568855] [2021-08-12 19:34:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:06,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007568855] [2021-08-12 19:34:06,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007568855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:06,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766673272] [2021-08-12 19:34:06,013 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 [2021-08-12 19:34:06,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:34:06,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:06,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:06,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:06,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:06,250 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 90 treesize of output 36 [2021-08-12 19:34:06,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:06,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:06,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:06,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:34:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:06,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766673272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:06,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:06,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 17 [2021-08-12 19:34:06,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54008505] [2021-08-12 19:34:06,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:34:06,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:34:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:34:06,265 INFO L87 Difference]: Start difference. First operand 402 states and 757 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:06,946 INFO L93 Difference]: Finished difference Result 764 states and 1492 transitions. [2021-08-12 19:34:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:34:06,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:34:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:06,951 INFO L225 Difference]: With dead ends: 764 [2021-08-12 19:34:06,952 INFO L226 Difference]: Without dead ends: 717 [2021-08-12 19:34:06,952 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:34:06,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-08-12 19:34:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 393. [2021-08-12 19:34:07,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.885204081632653) internal successors, (739), 392 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:07,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 739 transitions. [2021-08-12 19:34:07,026 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 739 transitions. Word has length 31 [2021-08-12 19:34:07,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:07,027 INFO L482 AbstractCegarLoop]: Abstraction has 393 states and 739 transitions. [2021-08-12 19:34:07,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 739 transitions. [2021-08-12 19:34:07,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:34:07,027 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:07,027 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:07,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 19:34:07,234 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -105859509, now seen corresponding path program 30 times [2021-08-12 19:34:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:07,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616487482] [2021-08-12 19:34:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:07,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:07,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616487482] [2021-08-12 19:34:07,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616487482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:07,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430770634] [2021-08-12 19:34:07,379 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 [2021-08-12 19:34:07,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:34:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:07,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:07,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:07,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:07,619 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 90 treesize of output 36 [2021-08-12 19:34:07,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:07,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:07,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:07,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:96, output treesize:7 [2021-08-12 19:34:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:07,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430770634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:07,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:07,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-12 19:34:07,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875133115] [2021-08-12 19:34:07,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:34:07,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:07,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:34:07,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:34:07,634 INFO L87 Difference]: Start difference. First operand 393 states and 739 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:08,356 INFO L93 Difference]: Finished difference Result 747 states and 1472 transitions. [2021-08-12 19:34:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:34:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:34:08,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:08,360 INFO L225 Difference]: With dead ends: 747 [2021-08-12 19:34:08,360 INFO L226 Difference]: Without dead ends: 700 [2021-08-12 19:34:08,360 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:34:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-08-12 19:34:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 414. [2021-08-12 19:34:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.8934624697336562) internal successors, (782), 413 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 782 transitions. [2021-08-12 19:34:08,447 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 782 transitions. Word has length 31 [2021-08-12 19:34:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:08,447 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 782 transitions. [2021-08-12 19:34:08,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 782 transitions. [2021-08-12 19:34:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:34:08,447 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:08,447 INFO L550 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:08,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:34:08,668 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:08,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:08,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1268614363, now seen corresponding path program 31 times [2021-08-12 19:34:08,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:08,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412205040] [2021-08-12 19:34:08,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:08,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412205040] [2021-08-12 19:34:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412205040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:08,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357961138] [2021-08-12 19:34:08,814 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 [2021-08-12 19:34:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:08,836 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:34:08,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:09,000 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-08-12 19:34:09,001 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 90 treesize of output 36 [2021-08-12 19:34:09,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:09,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:09,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:09,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:7 [2021-08-12 19:34:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:09,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357961138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:09,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:09,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-08-12 19:34:09,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130341765] [2021-08-12 19:34:09,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:34:09,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:34:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:34:09,013 INFO L87 Difference]: Start difference. First operand 414 states and 782 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) [2021-08-12 19:34:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:09,612 INFO L93 Difference]: Finished difference Result 611 states and 1182 transitions. [2021-08-12 19:34:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:34:09,612 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 31 [2021-08-12 19:34:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:09,614 INFO L225 Difference]: With dead ends: 611 [2021-08-12 19:34:09,614 INFO L226 Difference]: Without dead ends: 594 [2021-08-12 19:34:09,615 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:34:09,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-12 19:34:09,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 421. [2021-08-12 19:34:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.8976190476190475) internal successors, (797), 420 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 797 transitions. [2021-08-12 19:34:09,707 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 797 transitions. Word has length 31 [2021-08-12 19:34:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:09,707 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 797 transitions. [2021-08-12 19:34:09,707 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) [2021-08-12 19:34:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 797 transitions. [2021-08-12 19:34:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:34:09,708 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:09,708 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:09,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 19:34:09,924 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -416618662, now seen corresponding path program 32 times [2021-08-12 19:34:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:09,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812126299] [2021-08-12 19:34:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:34:09,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:09,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812126299] [2021-08-12 19:34:09,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812126299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:09,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961241038] [2021-08-12 19:34:09,956 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 [2021-08-12 19:34:09,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:34:09,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-12 19:34:10,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961241038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:10,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:10,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-08-12 19:34:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567129863] [2021-08-12 19:34:10,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:34:10,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:10,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:34:10,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:34:10,033 INFO L87 Difference]: Start difference. First operand 421 states and 797 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:10,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:10,413 INFO L93 Difference]: Finished difference Result 699 states and 1374 transitions. [2021-08-12 19:34:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-12 19:34:10,413 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:34:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:10,420 INFO L225 Difference]: With dead ends: 699 [2021-08-12 19:34:10,420 INFO L226 Difference]: Without dead ends: 640 [2021-08-12 19:34:10,420 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:34:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-08-12 19:34:10,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 540. [2021-08-12 19:34:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.0037105751391464) internal successors, (1080), 539 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1080 transitions. [2021-08-12 19:34:10,548 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1080 transitions. Word has length 32 [2021-08-12 19:34:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:10,548 INFO L482 AbstractCegarLoop]: Abstraction has 540 states and 1080 transitions. [2021-08-12 19:34:10,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1080 transitions. [2021-08-12 19:34:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 19:34:10,549 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:10,549 INFO L550 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:10,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:34:10,749 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash 502506762, now seen corresponding path program 33 times [2021-08-12 19:34:10,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:10,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183648540] [2021-08-12 19:34:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:10,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:10,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183648540] [2021-08-12 19:34:10,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183648540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:10,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478842235] [2021-08-12 19:34:10,780 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 [2021-08-12 19:34:10,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:34:10,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:10,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 19:34:10,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:10,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478842235] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:10,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:10,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-08-12 19:34:10,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019853987] [2021-08-12 19:34:10,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:34:10,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:10,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:34:10,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:34:10,847 INFO L87 Difference]: Start difference. First operand 540 states and 1080 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:11,418 INFO L93 Difference]: Finished difference Result 841 states and 1693 transitions. [2021-08-12 19:34:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:34:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-12 19:34:11,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:11,428 INFO L225 Difference]: With dead ends: 841 [2021-08-12 19:34:11,428 INFO L226 Difference]: Without dead ends: 811 [2021-08-12 19:34:11,428 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:34:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-08-12 19:34:11,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 585. [2021-08-12 19:34:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 584 states have (on average 2.0256849315068495) internal successors, (1183), 584 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1183 transitions. [2021-08-12 19:34:11,581 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1183 transitions. Word has length 32 [2021-08-12 19:34:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:11,582 INFO L482 AbstractCegarLoop]: Abstraction has 585 states and 1183 transitions. [2021-08-12 19:34:11,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1183 transitions. [2021-08-12 19:34:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:11,582 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:11,582 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:11,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 19:34:11,797 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1113334029, now seen corresponding path program 34 times [2021-08-12 19:34:11,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:11,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638048201] [2021-08-12 19:34:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:11,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:11,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638048201] [2021-08-12 19:34:11,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638048201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:11,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762811495] [2021-08-12 19:34:11,969 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 [2021-08-12 19:34:11,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:34:11,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:11,995 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:11,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:12,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:12,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:12,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:12,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:12,405 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 109 treesize of output 43 [2021-08-12 19:34:12,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:12,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:12,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:12,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:12,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762811495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:12,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:12,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2021-08-12 19:34:12,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696335227] [2021-08-12 19:34:12,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:34:12,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:12,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:34:12,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:34:12,421 INFO L87 Difference]: Start difference. First operand 585 states and 1183 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-08-12 19:34:13,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:13,921 INFO L93 Difference]: Finished difference Result 1502 states and 3124 transitions. [2021-08-12 19:34:13,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:34:13,922 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 35 [2021-08-12 19:34:13,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:13,926 INFO L225 Difference]: With dead ends: 1502 [2021-08-12 19:34:13,926 INFO L226 Difference]: Without dead ends: 1408 [2021-08-12 19:34:13,926 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 433.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:34:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-08-12 19:34:14,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 627. [2021-08-12 19:34:14,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 626 states have (on average 2.0143769968051117) internal successors, (1261), 626 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 1261 transitions. [2021-08-12 19:34:14,104 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 1261 transitions. Word has length 35 [2021-08-12 19:34:14,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:14,104 INFO L482 AbstractCegarLoop]: Abstraction has 627 states and 1261 transitions. [2021-08-12 19:34:14,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-08-12 19:34:14,104 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 1261 transitions. [2021-08-12 19:34:14,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:14,105 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:14,105 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:14,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 19:34:14,305 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:14,305 INFO L82 PathProgramCache]: Analyzing trace with hash 382694851, now seen corresponding path program 35 times [2021-08-12 19:34:14,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:14,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598790452] [2021-08-12 19:34:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:14,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598790452] [2021-08-12 19:34:14,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598790452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:14,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227066903] [2021-08-12 19:34:14,505 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 [2021-08-12 19:34:14,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:34:14,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:14,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:14,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:14,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:14,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:14,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:14,913 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 109 treesize of output 43 [2021-08-12 19:34:14,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:14,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:14,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:14,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227066903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:14,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:14,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-12 19:34:14,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939880065] [2021-08-12 19:34:14,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:34:14,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:34:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:34:14,930 INFO L87 Difference]: Start difference. First operand 627 states and 1261 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-12 19:34:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:16,677 INFO L93 Difference]: Finished difference Result 1500 states and 3138 transitions. [2021-08-12 19:34:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:34:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 35 [2021-08-12 19:34:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:16,682 INFO L225 Difference]: With dead ends: 1500 [2021-08-12 19:34:16,682 INFO L226 Difference]: Without dead ends: 1403 [2021-08-12 19:34:16,682 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 436.7ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:34:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-08-12 19:34:16,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 543. [2021-08-12 19:34:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.0387453874538743) internal successors, (1105), 542 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1105 transitions. [2021-08-12 19:34:16,855 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1105 transitions. Word has length 35 [2021-08-12 19:34:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:16,855 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1105 transitions. [2021-08-12 19:34:16,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-12 19:34:16,855 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1105 transitions. [2021-08-12 19:34:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:16,856 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:16,856 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:17,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-12 19:34:17,068 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1079804723, now seen corresponding path program 36 times [2021-08-12 19:34:17,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:17,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364630407] [2021-08-12 19:34:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:17,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:17,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364630407] [2021-08-12 19:34:17,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364630407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:17,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793032274] [2021-08-12 19:34:17,222 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 [2021-08-12 19:34:17,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:34:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:17,247 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:17,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:17,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:17,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:17,622 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 109 treesize of output 43 [2021-08-12 19:34:17,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:17,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:17,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:17,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:17,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793032274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:17,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:17,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-08-12 19:34:17,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618104557] [2021-08-12 19:34:17,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:34:17,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:17,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:34:17,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:34:17,654 INFO L87 Difference]: Start difference. First operand 543 states and 1105 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-08-12 19:34:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:18,886 INFO L93 Difference]: Finished difference Result 1270 states and 2662 transitions. [2021-08-12 19:34:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:34:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 35 [2021-08-12 19:34:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:18,890 INFO L225 Difference]: With dead ends: 1270 [2021-08-12 19:34:18,890 INFO L226 Difference]: Without dead ends: 1078 [2021-08-12 19:34:18,891 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:34:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-08-12 19:34:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 573. [2021-08-12 19:34:19,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-08-12 19:34:19,067 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-08-12 19:34:19,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:19,067 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-08-12 19:34:19,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-08-12 19:34:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-08-12 19:34:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:19,068 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:19,068 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:19,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:19,269 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash -884384461, now seen corresponding path program 37 times [2021-08-12 19:34:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:19,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693473536] [2021-08-12 19:34:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:19,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:19,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693473536] [2021-08-12 19:34:19,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693473536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:19,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862983079] [2021-08-12 19:34:19,461 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 [2021-08-12 19:34:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:19,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:19,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:19,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:19,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:19,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:19,918 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 109 treesize of output 43 [2021-08-12 19:34:19,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:19,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:19,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:19,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:19,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862983079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:19,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:19,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-12 19:34:19,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124924611] [2021-08-12 19:34:19,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:34:19,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:19,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:34:19,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:34:19,934 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-12 19:34:21,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:21,622 INFO L93 Difference]: Finished difference Result 1260 states and 2606 transitions. [2021-08-12 19:34:21,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:34:21,623 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 35 [2021-08-12 19:34:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:21,627 INFO L225 Difference]: With dead ends: 1260 [2021-08-12 19:34:21,627 INFO L226 Difference]: Without dead ends: 1204 [2021-08-12 19:34:21,627 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:34:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-08-12 19:34:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 567. [2021-08-12 19:34:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.0247349823321557) internal successors, (1146), 566 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1146 transitions. [2021-08-12 19:34:21,810 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1146 transitions. Word has length 35 [2021-08-12 19:34:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:21,810 INFO L482 AbstractCegarLoop]: Abstraction has 567 states and 1146 transitions. [2021-08-12 19:34:21,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-12 19:34:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1146 transitions. [2021-08-12 19:34:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:21,811 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:21,811 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:22,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:22,015 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash -144551933, now seen corresponding path program 38 times [2021-08-12 19:34:22,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:22,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898232157] [2021-08-12 19:34:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:22,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:22,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898232157] [2021-08-12 19:34:22,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898232157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:22,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536423131] [2021-08-12 19:34:22,261 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 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 [2021-08-12 19:34:22,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:22,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:22,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:22,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:22,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:22,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:22,685 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 109 treesize of output 43 [2021-08-12 19:34:22,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:22,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:22,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:22,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:22,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536423131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:22,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:22,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2021-08-12 19:34:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610782362] [2021-08-12 19:34:22,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:34:22,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:22,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:34:22,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:34:22,700 INFO L87 Difference]: Start difference. First operand 567 states and 1146 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-12 19:34:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:24,101 INFO L93 Difference]: Finished difference Result 936 states and 1909 transitions. [2021-08-12 19:34:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:34:24,102 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 35 [2021-08-12 19:34:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:24,105 INFO L225 Difference]: With dead ends: 936 [2021-08-12 19:34:24,105 INFO L226 Difference]: Without dead ends: 913 [2021-08-12 19:34:24,105 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:34:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-08-12 19:34:24,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 573. [2021-08-12 19:34:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0244755244755246) internal successors, (1158), 572 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:24,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1158 transitions. [2021-08-12 19:34:24,303 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1158 transitions. Word has length 35 [2021-08-12 19:34:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:24,304 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1158 transitions. [2021-08-12 19:34:24,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2021-08-12 19:34:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1158 transitions. [2021-08-12 19:34:24,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:24,304 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:24,304 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:24,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:24,513 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 894968627, now seen corresponding path program 39 times [2021-08-12 19:34:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:24,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597715733] [2021-08-12 19:34:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:24,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:24,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597715733] [2021-08-12 19:34:24,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597715733] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:24,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523669031] [2021-08-12 19:34:24,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:34:24,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:34:24,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:24,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:24,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:25,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:25,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:25,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:25,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:25,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 43 [2021-08-12 19:34:25,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:25,879 INFO L628 ElimStorePlain]: treesize reduction 3, result has 89.3 percent of original size [2021-08-12 19:34:25,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:25,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:124, output treesize:7 [2021-08-12 19:34:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:25,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523669031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:25,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:25,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-12 19:34:25,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469685061] [2021-08-12 19:34:25,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:34:25,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:34:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:34:25,889 INFO L87 Difference]: Start difference. First operand 573 states and 1158 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-08-12 19:34:30,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:30,257 INFO L93 Difference]: Finished difference Result 1200 states and 2407 transitions. [2021-08-12 19:34:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:34:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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 35 [2021-08-12 19:34:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:30,260 INFO L225 Difference]: With dead ends: 1200 [2021-08-12 19:34:30,260 INFO L226 Difference]: Without dead ends: 976 [2021-08-12 19:34:30,261 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1539.2ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:34:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-12 19:34:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 673. [2021-08-12 19:34:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.9970238095238095) internal successors, (1342), 672 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1342 transitions. [2021-08-12 19:34:30,507 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1342 transitions. Word has length 35 [2021-08-12 19:34:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:30,507 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 1342 transitions. [2021-08-12 19:34:30,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-08-12 19:34:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1342 transitions. [2021-08-12 19:34:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:30,508 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:30,508 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:30,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 19:34:30,719 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:30,719 INFO L82 PathProgramCache]: Analyzing trace with hash 855473251, now seen corresponding path program 40 times [2021-08-12 19:34:30,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:30,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244183538] [2021-08-12 19:34:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:30,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244183538] [2021-08-12 19:34:30,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244183538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:30,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126841388] [2021-08-12 19:34:30,912 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 [2021-08-12 19:34:30,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:34:30,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:30,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:31,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:31,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:31,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:31,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:34:31,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:31,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:31,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:31,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:31,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126841388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:31,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:31,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-08-12 19:34:31,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166025739] [2021-08-12 19:34:31,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:34:31,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:34:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:34:31,324 INFO L87 Difference]: Start difference. First operand 673 states and 1342 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-12 19:34:33,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:33,459 INFO L93 Difference]: Finished difference Result 1763 states and 3642 transitions. [2021-08-12 19:34:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:34:33,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 35 [2021-08-12 19:34:33,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:33,463 INFO L225 Difference]: With dead ends: 1763 [2021-08-12 19:34:33,463 INFO L226 Difference]: Without dead ends: 1632 [2021-08-12 19:34:33,464 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:34:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-08-12 19:34:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 763. [2021-08-12 19:34:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 1.9855643044619422) internal successors, (1513), 762 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1513 transitions. [2021-08-12 19:34:33,765 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1513 transitions. Word has length 35 [2021-08-12 19:34:33,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:33,765 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 1513 transitions. [2021-08-12 19:34:33,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-08-12 19:34:33,765 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1513 transitions. [2021-08-12 19:34:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:33,766 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:33,766 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:33,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:33,973 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1595305779, now seen corresponding path program 41 times [2021-08-12 19:34:33,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:33,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613484746] [2021-08-12 19:34:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:34,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:34,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613484746] [2021-08-12 19:34:34,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613484746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:34,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380695635] [2021-08-12 19:34:34,193 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 [2021-08-12 19:34:34,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:34:34,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:34,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-12 19:34:34,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:34,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:34,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:34,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:34,689 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 34 [2021-08-12 19:34:34,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:34,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:34,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:34,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:86, output treesize:3 [2021-08-12 19:34:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:34,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380695635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:34,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:34,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-12 19:34:34,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017649303] [2021-08-12 19:34:34,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:34:34,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:34,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:34:34,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:34:34,714 INFO L87 Difference]: Start difference. First operand 763 states and 1513 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:37,178 INFO L93 Difference]: Finished difference Result 1436 states and 2923 transitions. [2021-08-12 19:34:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:34:37,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:34:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:37,181 INFO L225 Difference]: With dead ends: 1436 [2021-08-12 19:34:37,181 INFO L226 Difference]: Without dead ends: 1212 [2021-08-12 19:34:37,182 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1070.5ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:34:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-08-12 19:34:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 799. [2021-08-12 19:34:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 1.9862155388471179) internal successors, (1585), 798 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) [2021-08-12 19:34:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1585 transitions. [2021-08-12 19:34:37,481 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1585 transitions. Word has length 35 [2021-08-12 19:34:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:37,481 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 1585 transitions. [2021-08-12 19:34:37,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1585 transitions. [2021-08-12 19:34:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:37,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:37,482 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:37,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:37,694 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 41830851, now seen corresponding path program 42 times [2021-08-12 19:34:37,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:37,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126033561] [2021-08-12 19:34:37,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:37,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:37,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126033561] [2021-08-12 19:34:37,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126033561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:37,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417449321] [2021-08-12 19:34:37,897 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 [2021-08-12 19:34:37,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:34:37,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:37,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:37,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:38,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:38,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:34:38,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:38,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:38,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:38,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:38,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417449321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:38,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:38,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-12 19:34:38,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996889351] [2021-08-12 19:34:38,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:34:38,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:38,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:34:38,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:34:38,293 INFO L87 Difference]: Start difference. First operand 799 states and 1585 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-08-12 19:34:40,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:40,785 INFO L93 Difference]: Finished difference Result 1506 states and 3034 transitions. [2021-08-12 19:34:40,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:34:40,786 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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 35 [2021-08-12 19:34:40,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:40,789 INFO L225 Difference]: With dead ends: 1506 [2021-08-12 19:34:40,789 INFO L226 Difference]: Without dead ends: 1463 [2021-08-12 19:34:40,789 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 427.2ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:34:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-08-12 19:34:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 826. [2021-08-12 19:34:41,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 1.9903030303030302) internal successors, (1642), 825 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:41,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1642 transitions. [2021-08-12 19:34:41,118 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1642 transitions. Word has length 35 [2021-08-12 19:34:41,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:41,118 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 1642 transitions. [2021-08-12 19:34:41,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 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) [2021-08-12 19:34:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1642 transitions. [2021-08-12 19:34:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:41,119 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:41,119 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:41,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:34:41,320 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:41,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:41,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1721364211, now seen corresponding path program 43 times [2021-08-12 19:34:41,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:41,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176494424] [2021-08-12 19:34:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:41,575 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:41,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:41,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176494424] [2021-08-12 19:34:41,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176494424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:41,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910018057] [2021-08-12 19:34:41,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:41,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:41,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:41,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:41,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:34:41,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:41,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:41,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:41,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:41,944 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:41,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910018057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:41,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:41,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-08-12 19:34:41,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713518329] [2021-08-12 19:34:41,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:34:41,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:41,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:34:41,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:34:41,945 INFO L87 Difference]: Start difference. First operand 826 states and 1642 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) [2021-08-12 19:34:44,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:44,120 INFO L93 Difference]: Finished difference Result 1687 states and 3385 transitions. [2021-08-12 19:34:44,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:34:44,127 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 35 [2021-08-12 19:34:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:44,130 INFO L225 Difference]: With dead ends: 1687 [2021-08-12 19:34:44,130 INFO L226 Difference]: Without dead ends: 1455 [2021-08-12 19:34:44,130 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 650.3ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:34:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-08-12 19:34:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 996. [2021-08-12 19:34:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.977889447236181) internal successors, (1968), 995 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1968 transitions. [2021-08-12 19:34:44,514 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1968 transitions. Word has length 35 [2021-08-12 19:34:44,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:44,514 INFO L482 AbstractCegarLoop]: Abstraction has 996 states and 1968 transitions. [2021-08-12 19:34:44,514 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) [2021-08-12 19:34:44,514 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1968 transitions. [2021-08-12 19:34:44,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:44,515 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:44,515 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:44,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 19:34:44,716 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:44,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1665521843, now seen corresponding path program 44 times [2021-08-12 19:34:44,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:44,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551070106] [2021-08-12 19:34:44,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:44,872 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-12 19:34:44,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:44,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551070106] [2021-08-12 19:34:44,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551070106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:44,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887373768] [2021-08-12 19:34:44,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:34:44,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:34:44,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:44,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:45,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:45,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:45,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:34:45,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:45,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:45,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:45,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:45,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887373768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:45,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:45,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 19 [2021-08-12 19:34:45,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100316709] [2021-08-12 19:34:45,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 19:34:45,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:45,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 19:34:45,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:34:45,206 INFO L87 Difference]: Start difference. First operand 996 states and 1968 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:47,650 INFO L93 Difference]: Finished difference Result 1891 states and 3825 transitions. [2021-08-12 19:34:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:34:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:34:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:47,654 INFO L225 Difference]: With dead ends: 1891 [2021-08-12 19:34:47,654 INFO L226 Difference]: Without dead ends: 1691 [2021-08-12 19:34:47,655 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:34:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-08-12 19:34:48,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1029. [2021-08-12 19:34:48,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.9815175097276265) internal successors, (2037), 1028 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:48,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2037 transitions. [2021-08-12 19:34:48,064 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2037 transitions. Word has length 35 [2021-08-12 19:34:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:48,064 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 2037 transitions. [2021-08-12 19:34:48,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2037 transitions. [2021-08-12 19:34:48,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:48,065 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:48,066 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:48,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 19:34:48,266 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:48,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:48,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1526251277, now seen corresponding path program 45 times [2021-08-12 19:34:48,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:48,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463051440] [2021-08-12 19:34:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:48,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463051440] [2021-08-12 19:34:48,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463051440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:48,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495794888] [2021-08-12 19:34:48,465 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 [2021-08-12 19:34:48,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:34:48,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:48,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-12 19:34:48,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:48,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 43 [2021-08-12 19:34:48,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:48,928 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-08-12 19:34:48,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:48,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:127, output treesize:7 [2021-08-12 19:34:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:48,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495794888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:48,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:48,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-08-12 19:34:48,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909306772] [2021-08-12 19:34:48,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:34:48,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:48,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:34:48,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:34:48,937 INFO L87 Difference]: Start difference. First operand 1029 states and 2037 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:51,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:51,853 INFO L93 Difference]: Finished difference Result 2021 states and 4013 transitions. [2021-08-12 19:34:51,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:34:51,853 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:34:51,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:51,857 INFO L225 Difference]: With dead ends: 2021 [2021-08-12 19:34:51,857 INFO L226 Difference]: Without dead ends: 1805 [2021-08-12 19:34:51,857 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 908.4ms TimeCoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:34:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2021-08-12 19:34:52,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1140. [2021-08-12 19:34:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 1.9675153643546972) internal successors, (2241), 1139 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2241 transitions. [2021-08-12 19:34:52,366 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2241 transitions. Word has length 35 [2021-08-12 19:34:52,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:52,367 INFO L482 AbstractCegarLoop]: Abstraction has 1140 states and 2241 transitions. [2021-08-12 19:34:52,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2241 transitions. [2021-08-12 19:34:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:52,368 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:52,368 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:52,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:52,584 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:52,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:52,584 INFO L82 PathProgramCache]: Analyzing trace with hash -825914125, now seen corresponding path program 46 times [2021-08-12 19:34:52,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:52,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183415411] [2021-08-12 19:34:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:52,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183415411] [2021-08-12 19:34:52,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183415411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:52,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580598384] [2021-08-12 19:34:52,845 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 [2021-08-12 19:34:52,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:34:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:52,874 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:34:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:53,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:53,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:53,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:34:53,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:53,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:53,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:53,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:34:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:53,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580598384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:53,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:53,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-12 19:34:53,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218044374] [2021-08-12 19:34:53,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:34:53,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:53,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:34:53,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:34:53,213 INFO L87 Difference]: Start difference. First operand 1140 states and 2241 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) [2021-08-12 19:34:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:34:56,075 INFO L93 Difference]: Finished difference Result 2040 states and 4175 transitions. [2021-08-12 19:34:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:34:56,076 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 35 [2021-08-12 19:34:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:34:56,079 INFO L225 Difference]: With dead ends: 2040 [2021-08-12 19:34:56,080 INFO L226 Difference]: Without dead ends: 1919 [2021-08-12 19:34:56,080 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:34:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2021-08-12 19:34:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1155. [2021-08-12 19:34:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.9679376083188909) internal successors, (2271), 1154 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:34:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2271 transitions. [2021-08-12 19:34:56,569 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2271 transitions. Word has length 35 [2021-08-12 19:34:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:34:56,570 INFO L482 AbstractCegarLoop]: Abstraction has 1155 states and 2271 transitions. [2021-08-12 19:34:56,570 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) [2021-08-12 19:34:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2271 transitions. [2021-08-12 19:34:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:34:56,571 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:34:56,571 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:34:56,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:34:56,773 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:34:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:34:56,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2143963011, now seen corresponding path program 47 times [2021-08-12 19:34:56,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:34:56,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517915667] [2021-08-12 19:34:56,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:34:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:34:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:56,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:34:56,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517915667] [2021-08-12 19:34:56,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517915667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:56,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229555825] [2021-08-12 19:34:56,985 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 [2021-08-12 19:34:57,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 19:34:57,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:34:57,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-12 19:34:57,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:34:57,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:57,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:34:57,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:34:57,457 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 34 [2021-08-12 19:34:57,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:34:57,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:34:57,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:34:57,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:3 [2021-08-12 19:34:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:34:57,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229555825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:34:57,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:34:57,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-08-12 19:34:57,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089210303] [2021-08-12 19:34:57,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:34:57,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:34:57,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:34:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:34:57,482 INFO L87 Difference]: Start difference. First operand 1155 states and 2271 transitions. Second operand has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:00,441 INFO L93 Difference]: Finished difference Result 1929 states and 3870 transitions. [2021-08-12 19:35:00,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:35:00,441 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-12 19:35:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:00,445 INFO L225 Difference]: With dead ends: 1929 [2021-08-12 19:35:00,445 INFO L226 Difference]: Without dead ends: 1781 [2021-08-12 19:35:00,446 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 745.9ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:35:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-08-12 19:35:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1224. [2021-08-12 19:35:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9754701553556828) internal successors, (2416), 1223 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2416 transitions. [2021-08-12 19:35:00,982 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2416 transitions. Word has length 35 [2021-08-12 19:35:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:00,982 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2416 transitions. [2021-08-12 19:35:00,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:00,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2416 transitions. [2021-08-12 19:35:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:35:00,983 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:00,983 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:01,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-12 19:35:01,184 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash -690344573, now seen corresponding path program 48 times [2021-08-12 19:35:01,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:01,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041868373] [2021-08-12 19:35:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:01,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041868373] [2021-08-12 19:35:01,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041868373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111772305] [2021-08-12 19:35:01,371 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 [2021-08-12 19:35:01,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 19:35:01,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:01,396 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:35:01,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:01,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:01,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:35:01,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:01,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:01,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:01,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:35:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:01,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111772305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:01,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:01,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 20 [2021-08-12 19:35:01,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187336338] [2021-08-12 19:35:01,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:35:01,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:01,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:35:01,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:35:01,694 INFO L87 Difference]: Start difference. First operand 1224 states and 2416 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-08-12 19:35:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:05,419 INFO L93 Difference]: Finished difference Result 2193 states and 4422 transitions. [2021-08-12 19:35:05,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:35:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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 35 [2021-08-12 19:35:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:05,423 INFO L225 Difference]: With dead ends: 2193 [2021-08-12 19:35:05,423 INFO L226 Difference]: Without dead ends: 2131 [2021-08-12 19:35:05,424 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:35:05,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-08-12 19:35:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1191. [2021-08-12 19:35:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-08-12 19:35:05,974 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-08-12 19:35:05,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:05,974 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-08-12 19:35:05,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 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) [2021-08-12 19:35:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-08-12 19:35:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:35:05,976 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:05,976 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:06,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:06,176 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:06,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:06,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1450667133, now seen corresponding path program 49 times [2021-08-12 19:35:06,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:06,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482693033] [2021-08-12 19:35:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:06,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:06,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482693033] [2021-08-12 19:35:06,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482693033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:06,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725488824] [2021-08-12 19:35:06,412 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 [2021-08-12 19:35:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:06,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:35:06,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:06,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:06,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:35:06,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:06,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:06,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:06,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:35:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:06,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725488824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:06,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:06,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-12 19:35:06,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621024707] [2021-08-12 19:35:06,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:35:06,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:06,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:35:06,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:35:06,774 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 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) [2021-08-12 19:35:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:10,354 INFO L93 Difference]: Finished difference Result 1994 states and 4018 transitions. [2021-08-12 19:35:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:35:10,354 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 35 [2021-08-12 19:35:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:10,357 INFO L225 Difference]: With dead ends: 1994 [2021-08-12 19:35:10,357 INFO L226 Difference]: Without dead ends: 1936 [2021-08-12 19:35:10,358 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:35:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-08-12 19:35:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1191. [2021-08-12 19:35:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.9714285714285715) internal successors, (2346), 1190 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2346 transitions. [2021-08-12 19:35:10,904 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2346 transitions. Word has length 35 [2021-08-12 19:35:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:10,904 INFO L482 AbstractCegarLoop]: Abstraction has 1191 states and 2346 transitions. [2021-08-12 19:35:10,905 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) [2021-08-12 19:35:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2346 transitions. [2021-08-12 19:35:10,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-12 19:35:10,906 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:10,906 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:11,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 19:35:11,108 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:11,108 INFO L82 PathProgramCache]: Analyzing trace with hash 9304755, now seen corresponding path program 50 times [2021-08-12 19:35:11,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:11,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959613349] [2021-08-12 19:35:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:11,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:11,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959613349] [2021-08-12 19:35:11,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959613349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:11,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754032086] [2021-08-12 19:35:11,323 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 [2021-08-12 19:35:11,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:35:11,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:11,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:35:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:11,605 INFO L354 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2021-08-12 19:35:11,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:35:11,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:11,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:11,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:11,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:109, output treesize:7 [2021-08-12 19:35:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:11,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754032086] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:11,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:11,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-08-12 19:35:11,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309322679] [2021-08-12 19:35:11,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 19:35:11,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 19:35:11,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:35:11,618 INFO L87 Difference]: Start difference. First operand 1191 states and 2346 transitions. Second operand has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-08-12 19:35:14,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:14,595 INFO L93 Difference]: Finished difference Result 1631 states and 3232 transitions. [2021-08-12 19:35:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:35:14,595 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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 35 [2021-08-12 19:35:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:14,599 INFO L225 Difference]: With dead ends: 1631 [2021-08-12 19:35:14,599 INFO L226 Difference]: Without dead ends: 1614 [2021-08-12 19:35:14,599 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:35:14,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-08-12 19:35:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1198. [2021-08-12 19:35:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.9724310776942355) internal successors, (2361), 1197 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2361 transitions. [2021-08-12 19:35:15,169 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2361 transitions. Word has length 35 [2021-08-12 19:35:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:15,169 INFO L482 AbstractCegarLoop]: Abstraction has 1198 states and 2361 transitions. [2021-08-12 19:35:15,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 20 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) [2021-08-12 19:35:15,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2361 transitions. [2021-08-12 19:35:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 19:35:15,170 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:15,170 INFO L550 BasicCegarLoop]: trace histogram [7, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:15,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 19:35:15,371 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash 118614578, now seen corresponding path program 51 times [2021-08-12 19:35:15,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:15,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818330211] [2021-08-12 19:35:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:15,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:15,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818330211] [2021-08-12 19:35:15,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818330211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:15,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800951418] [2021-08-12 19:35:15,426 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 [2021-08-12 19:35:15,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:35:15,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:15,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 19:35:15,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:15,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800951418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:15,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:15,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-08-12 19:35:15,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561396644] [2021-08-12 19:35:15,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:35:15,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:15,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:35:15,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:35:15,535 INFO L87 Difference]: Start difference. First operand 1198 states and 2361 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:17,749 INFO L93 Difference]: Finished difference Result 1547 states and 3074 transitions. [2021-08-12 19:35:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:35:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-12 19:35:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:17,753 INFO L225 Difference]: With dead ends: 1547 [2021-08-12 19:35:17,753 INFO L226 Difference]: Without dead ends: 1516 [2021-08-12 19:35:17,754 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:35:17,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-08-12 19:35:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1247. [2021-08-12 19:35:18,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.9839486356340288) internal successors, (2472), 1246 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 2472 transitions. [2021-08-12 19:35:18,456 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 2472 transitions. Word has length 36 [2021-08-12 19:35:18,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:18,456 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 2472 transitions. [2021-08-12 19:35:18,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:18,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 2472 transitions. [2021-08-12 19:35:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-12 19:35:18,457 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:18,457 INFO L550 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:18,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 19:35:18,673 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:18,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:18,673 INFO L82 PathProgramCache]: Analyzing trace with hash 211103962, now seen corresponding path program 52 times [2021-08-12 19:35:18,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:18,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144040619] [2021-08-12 19:35:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:18,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:18,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144040619] [2021-08-12 19:35:18,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144040619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:18,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972436645] [2021-08-12 19:35:18,853 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 [2021-08-12 19:35:18,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:35:18,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:18,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-12 19:35:18,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:19,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:19,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:19,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 43 [2021-08-12 19:35:19,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:19,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:19,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:19,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:115, output treesize:7 [2021-08-12 19:35:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:19,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972436645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:19,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:19,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-08-12 19:35:19,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783358923] [2021-08-12 19:35:19,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:35:19,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:19,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:35:19,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:35:19,230 INFO L87 Difference]: Start difference. First operand 1247 states and 2472 transitions. Second operand has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-08-12 19:35:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:24,648 INFO L93 Difference]: Finished difference Result 2819 states and 5749 transitions. [2021-08-12 19:35:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:35:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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 38 [2021-08-12 19:35:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:24,652 INFO L225 Difference]: With dead ends: 2819 [2021-08-12 19:35:24,652 INFO L226 Difference]: Without dead ends: 2497 [2021-08-12 19:35:24,653 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 816.5ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:35:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-08-12 19:35:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1341. [2021-08-12 19:35:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 1.983582089552239) internal successors, (2658), 1340 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 2658 transitions. [2021-08-12 19:35:25,436 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 2658 transitions. Word has length 38 [2021-08-12 19:35:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:25,436 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 2658 transitions. [2021-08-12 19:35:25,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.409090909090909) internal successors, (53), 21 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) [2021-08-12 19:35:25,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 2658 transitions. [2021-08-12 19:35:25,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:35:25,437 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:25,437 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:25,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 19:35:25,638 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -918345861, now seen corresponding path program 53 times [2021-08-12 19:35:25,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:25,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136132891] [2021-08-12 19:35:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:25,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:25,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136132891] [2021-08-12 19:35:25,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136132891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:25,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210735330] [2021-08-12 19:35:25,849 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 [2021-08-12 19:35:25,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:35:25,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:25,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-12 19:35:25,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:26,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:26,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:26,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:26,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:26,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:26,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 38 [2021-08-12 19:35:26,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:26,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:26,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:26,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:98, output treesize:3 [2021-08-12 19:35:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210735330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:26,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:26,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-08-12 19:35:26,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117562857] [2021-08-12 19:35:26,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-08-12 19:35:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-12 19:35:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=905, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:35:26,496 INFO L87 Difference]: Start difference. First operand 1341 states and 2658 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:33,880 INFO L93 Difference]: Finished difference Result 2821 states and 5698 transitions. [2021-08-12 19:35:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:35:33,880 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:35:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:33,884 INFO L225 Difference]: With dead ends: 2821 [2021-08-12 19:35:33,884 INFO L226 Difference]: Without dead ends: 2609 [2021-08-12 19:35:33,885 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 1598.6ms TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 19:35:33,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2609 states. [2021-08-12 19:35:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2609 to 1437. [2021-08-12 19:35:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 1.9700557103064067) internal successors, (2829), 1436 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 2829 transitions. [2021-08-12 19:35:34,714 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 2829 transitions. Word has length 39 [2021-08-12 19:35:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:34,714 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 2829 transitions. [2021-08-12 19:35:34,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 2829 transitions. [2021-08-12 19:35:34,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:35:34,716 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:34,716 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:34,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:34,916 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:34,917 INFO L82 PathProgramCache]: Analyzing trace with hash 456128011, now seen corresponding path program 54 times [2021-08-12 19:35:34,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:34,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067291684] [2021-08-12 19:35:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:35,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:35,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067291684] [2021-08-12 19:35:35,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067291684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:35,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560886688] [2021-08-12 19:35:35,141 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 [2021-08-12 19:35:35,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:35:35,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:35,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:35:35,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:35,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:35,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:35,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:35,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:35:35,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:35,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:35,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:35,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:35:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:35,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560886688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:35,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:35,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-12 19:35:35,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524871246] [2021-08-12 19:35:35,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:35:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:35:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:35:35,708 INFO L87 Difference]: Start difference. First operand 1437 states and 2829 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:35:41,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:41,891 INFO L93 Difference]: Finished difference Result 2313 states and 4612 transitions. [2021-08-12 19:35:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:35:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-08-12 19:35:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:41,895 INFO L225 Difference]: With dead ends: 2313 [2021-08-12 19:35:41,895 INFO L226 Difference]: Without dead ends: 2290 [2021-08-12 19:35:41,895 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 593.5ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:35:41,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-08-12 19:35:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1458. [2021-08-12 19:35:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 1.969114619080302) internal successors, (2869), 1457 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 2869 transitions. [2021-08-12 19:35:42,772 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 2869 transitions. Word has length 39 [2021-08-12 19:35:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:42,772 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 2869 transitions. [2021-08-12 19:35:42,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:35:42,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 2869 transitions. [2021-08-12 19:35:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:35:42,774 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:42,774 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:42,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 19:35:42,978 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -338168453, now seen corresponding path program 55 times [2021-08-12 19:35:42,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:42,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209076026] [2021-08-12 19:35:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:43,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:43,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209076026] [2021-08-12 19:35:43,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209076026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:43,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806899015] [2021-08-12 19:35:43,207 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 [2021-08-12 19:35:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:43,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:35:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:43,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:43,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:43,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:43,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:43,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:43,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:35:43,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:43,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:43,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:43,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:35:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:43,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806899015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:43,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:43,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-08-12 19:35:43,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892060110] [2021-08-12 19:35:43,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:35:43,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:35:43,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:35:43,834 INFO L87 Difference]: Start difference. First operand 1458 states and 2869 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2021-08-12 19:35:48,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:48,989 INFO L93 Difference]: Finished difference Result 2402 states and 4782 transitions. [2021-08-12 19:35:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:35:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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 39 [2021-08-12 19:35:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:48,993 INFO L225 Difference]: With dead ends: 2402 [2021-08-12 19:35:48,993 INFO L226 Difference]: Without dead ends: 2109 [2021-08-12 19:35:48,994 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 853.5ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:35:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-08-12 19:35:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1497. [2021-08-12 19:35:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 1.9545454545454546) internal successors, (2924), 1496 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 2924 transitions. [2021-08-12 19:35:49,948 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 2924 transitions. Word has length 39 [2021-08-12 19:35:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:49,948 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 2924 transitions. [2021-08-12 19:35:49,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 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) [2021-08-12 19:35:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 2924 transitions. [2021-08-12 19:35:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:35:49,950 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:49,950 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:50,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:35:50,166 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:50,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:50,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2077655787, now seen corresponding path program 56 times [2021-08-12 19:35:50,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:50,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676234732] [2021-08-12 19:35:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:50,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:50,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676234732] [2021-08-12 19:35:50,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676234732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:50,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687418449] [2021-08-12 19:35:50,390 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 [2021-08-12 19:35:50,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:35:50,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:50,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:35:50,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:35:50,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:50,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:50,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:50,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:35:50,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:35:50,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:35:50,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:35:50,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:35:50,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:35:50,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:35:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:50,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687418449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:50,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:35:50,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-12 19:35:50,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577276849] [2021-08-12 19:35:50,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:35:50,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:35:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:35:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:35:50,951 INFO L87 Difference]: Start difference. First operand 1497 states and 2924 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:35:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:35:58,518 INFO L93 Difference]: Finished difference Result 3108 states and 6334 transitions. [2021-08-12 19:35:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:35:58,519 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-08-12 19:35:58,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:35:58,523 INFO L225 Difference]: With dead ends: 3108 [2021-08-12 19:35:58,523 INFO L226 Difference]: Without dead ends: 2973 [2021-08-12 19:35:58,523 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:35:58,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2021-08-12 19:35:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 1152. [2021-08-12 19:35:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 1.9791485664639443) internal successors, (2278), 1151 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:35:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2278 transitions. [2021-08-12 19:35:59,322 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2278 transitions. Word has length 39 [2021-08-12 19:35:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:35:59,322 INFO L482 AbstractCegarLoop]: Abstraction has 1152 states and 2278 transitions. [2021-08-12 19:35:59,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:35:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2278 transitions. [2021-08-12 19:35:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:35:59,323 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:35:59,323 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:35:59,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-12 19:35:59,523 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:35:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:35:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash -842837637, now seen corresponding path program 57 times [2021-08-12 19:35:59,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:35:59,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412669532] [2021-08-12 19:35:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:35:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:35:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:35:59,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:35:59,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412669532] [2021-08-12 19:35:59,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412669532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:35:59,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523115991] [2021-08-12 19:35:59,738 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 [2021-08-12 19:35:59,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 19:35:59,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:35:59,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-12 19:35:59,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:00,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:00,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:00,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:00,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:00,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:00,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:00,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:00,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:00,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:00,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523115991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:00,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:00,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-12 19:36:00,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606516940] [2021-08-12 19:36:00,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:36:00,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:00,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:36:00,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:36:00,307 INFO L87 Difference]: Start difference. First operand 1152 states and 2278 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:36:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:07,304 INFO L93 Difference]: Finished difference Result 2676 states and 5437 transitions. [2021-08-12 19:36:07,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:36:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-08-12 19:36:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:07,308 INFO L225 Difference]: With dead ends: 2676 [2021-08-12 19:36:07,308 INFO L226 Difference]: Without dead ends: 2391 [2021-08-12 19:36:07,309 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:36:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-12 19:36:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1314. [2021-08-12 19:36:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 1.9695354150799695) internal successors, (2586), 1313 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2586 transitions. [2021-08-12 19:36:08,204 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2586 transitions. Word has length 39 [2021-08-12 19:36:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:08,204 INFO L482 AbstractCegarLoop]: Abstraction has 1314 states and 2586 transitions. [2021-08-12 19:36:08,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:36:08,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2586 transitions. [2021-08-12 19:36:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:36:08,205 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:08,205 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:08,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:08,421 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:08,421 INFO L82 PathProgramCache]: Analyzing trace with hash -425263029, now seen corresponding path program 58 times [2021-08-12 19:36:08,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:08,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870024620] [2021-08-12 19:36:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:08,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:08,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870024620] [2021-08-12 19:36:08,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870024620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:08,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751750707] [2021-08-12 19:36:08,686 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 [2021-08-12 19:36:08,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:36:08,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:08,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:36:08,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:09,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:09,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:09,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:09,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:09,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:09,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:09,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:09,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:09,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:09,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:09,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751750707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:09,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:09,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-12 19:36:09,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852709753] [2021-08-12 19:36:09,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:36:09,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:09,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:36:09,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:36:09,264 INFO L87 Difference]: Start difference. First operand 1314 states and 2586 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:36:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:17,094 INFO L93 Difference]: Finished difference Result 2630 states and 5310 transitions. [2021-08-12 19:36:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:36:17,094 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-08-12 19:36:17,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:17,098 INFO L225 Difference]: With dead ends: 2630 [2021-08-12 19:36:17,099 INFO L226 Difference]: Without dead ends: 2562 [2021-08-12 19:36:17,099 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:36:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2021-08-12 19:36:17,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1257. [2021-08-12 19:36:17,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 1.9729299363057324) internal successors, (2478), 1256 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 2478 transitions. [2021-08-12 19:36:17,971 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 2478 transitions. Word has length 39 [2021-08-12 19:36:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:17,971 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 2478 transitions. [2021-08-12 19:36:17,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:36:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 2478 transitions. [2021-08-12 19:36:17,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:36:17,973 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:17,973 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:18,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-12 19:36:18,189 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:18,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1562671547, now seen corresponding path program 59 times [2021-08-12 19:36:18,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:18,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969713910] [2021-08-12 19:36:18,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:18,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:18,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969713910] [2021-08-12 19:36:18,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969713910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:18,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444761077] [2021-08-12 19:36:18,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:36:18,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:36:18,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:18,498 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-12 19:36:18,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:18,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:18,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:18,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:18,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:18,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:18,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:18,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:18,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:18,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:18,994 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:18,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444761077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:18,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:18,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-12 19:36:18,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49212354] [2021-08-12 19:36:18,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:36:18,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:18,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:36:18,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:36:18,995 INFO L87 Difference]: Start difference. First operand 1257 states and 2478 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:36:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:23,694 INFO L93 Difference]: Finished difference Result 1843 states and 3653 transitions. [2021-08-12 19:36:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:36:23,695 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-08-12 19:36:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:23,698 INFO L225 Difference]: With dead ends: 1843 [2021-08-12 19:36:23,698 INFO L226 Difference]: Without dead ends: 1810 [2021-08-12 19:36:23,698 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:36:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-08-12 19:36:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1383. [2021-08-12 19:36:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 1.960202604920405) internal successors, (2709), 1382 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2709 transitions. [2021-08-12 19:36:24,634 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2709 transitions. Word has length 39 [2021-08-12 19:36:24,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:24,634 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 2709 transitions. [2021-08-12 19:36:24,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:36:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2709 transitions. [2021-08-12 19:36:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:36:24,635 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:24,635 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:24,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:24,839 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:24,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:24,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1491350523, now seen corresponding path program 60 times [2021-08-12 19:36:24,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:24,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001462035] [2021-08-12 19:36:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-12 19:36:25,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:25,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001462035] [2021-08-12 19:36:25,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001462035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:25,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902997062] [2021-08-12 19:36:25,028 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 [2021-08-12 19:36:25,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 19:36:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:25,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:36:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:25,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:25,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:25,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:25,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:25,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:25,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:25,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:25,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:25,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:25,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:25,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 6 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:25,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902997062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:25,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:25,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2021-08-12 19:36:25,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25557514] [2021-08-12 19:36:25,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:36:25,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:25,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:36:25,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:36:25,539 INFO L87 Difference]: Start difference. First operand 1383 states and 2709 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:31,507 INFO L93 Difference]: Finished difference Result 2029 states and 4036 transitions. [2021-08-12 19:36:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:36:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:36:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:31,511 INFO L225 Difference]: With dead ends: 2029 [2021-08-12 19:36:31,512 INFO L226 Difference]: Without dead ends: 1995 [2021-08-12 19:36:31,512 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 826.9ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:36:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2021-08-12 19:36:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1166. [2021-08-12 19:36:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1165 states have (on average 1.9630901287553648) internal successors, (2287), 1165 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2287 transitions. [2021-08-12 19:36:32,386 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2287 transitions. Word has length 39 [2021-08-12 19:36:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:32,386 INFO L482 AbstractCegarLoop]: Abstraction has 1166 states and 2287 transitions. [2021-08-12 19:36:32,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:32,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2287 transitions. [2021-08-12 19:36:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:36:32,387 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:32,387 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:32,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 19:36:32,588 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1844161605, now seen corresponding path program 61 times [2021-08-12 19:36:32,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:32,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423390075] [2021-08-12 19:36:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:32,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:32,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423390075] [2021-08-12 19:36:32,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423390075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:32,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040059159] [2021-08-12 19:36:32,814 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 [2021-08-12 19:36:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:32,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:36:32,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:33,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:33,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:33,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:33,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:33,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:33,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:33,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:33,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:33,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:33,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:33,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:33,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:33,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040059159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:33,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:33,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-08-12 19:36:33,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805010907] [2021-08-12 19:36:33,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:36:33,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:36:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:36:33,354 INFO L87 Difference]: Start difference. First operand 1166 states and 2287 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-08-12 19:36:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:38,343 INFO L93 Difference]: Finished difference Result 1983 states and 3944 transitions. [2021-08-12 19:36:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:36:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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 39 [2021-08-12 19:36:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:38,347 INFO L225 Difference]: With dead ends: 1983 [2021-08-12 19:36:38,347 INFO L226 Difference]: Without dead ends: 1696 [2021-08-12 19:36:38,348 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 811.9ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:36:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2021-08-12 19:36:39,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 1224. [2021-08-12 19:36:39,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 1.9574816026165167) internal successors, (2394), 1223 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2394 transitions. [2021-08-12 19:36:39,311 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2394 transitions. Word has length 39 [2021-08-12 19:36:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:39,311 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 2394 transitions. [2021-08-12 19:36:39,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-08-12 19:36:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2394 transitions. [2021-08-12 19:36:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:36:39,312 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:39,312 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:39,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:36:39,513 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1946136507, now seen corresponding path program 62 times [2021-08-12 19:36:39,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:39,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600254188] [2021-08-12 19:36:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:39,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:39,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600254188] [2021-08-12 19:36:39,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600254188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:39,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680587051] [2021-08-12 19:36:39,770 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 [2021-08-12 19:36:39,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:36:39,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:39,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:36:39,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:40,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:40,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:40,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:40,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:40,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:40,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:40,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:40,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:40,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:40,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680587051] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:40,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:40,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-12 19:36:40,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869081188] [2021-08-12 19:36:40,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:36:40,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:40,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:36:40,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:36:40,335 INFO L87 Difference]: Start difference. First operand 1224 states and 2394 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:36:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:46,909 INFO L93 Difference]: Finished difference Result 2351 states and 4823 transitions. [2021-08-12 19:36:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:36:46,909 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-08-12 19:36:46,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:46,913 INFO L225 Difference]: With dead ends: 2351 [2021-08-12 19:36:46,913 INFO L226 Difference]: Without dead ends: 2230 [2021-08-12 19:36:46,914 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 638.8ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:36:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-08-12 19:36:47,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1230. [2021-08-12 19:36:47,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.9576891781936534) internal successors, (2406), 1229 states have internal predecessors, (2406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:47,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2406 transitions. [2021-08-12 19:36:47,941 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2406 transitions. Word has length 39 [2021-08-12 19:36:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:47,941 INFO L482 AbstractCegarLoop]: Abstraction has 1230 states and 2406 transitions. [2021-08-12 19:36:47,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:36:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2406 transitions. [2021-08-12 19:36:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:36:47,942 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:47,942 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:48,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-12 19:36:48,142 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1339514507, now seen corresponding path program 63 times [2021-08-12 19:36:48,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:48,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440221928] [2021-08-12 19:36:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:48,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:48,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440221928] [2021-08-12 19:36:48,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440221928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:48,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892988162] [2021-08-12 19:36:48,357 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 [2021-08-12 19:36:48,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 19:36:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:48,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:36:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:48,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:48,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:48,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:48,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:48,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:48,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:48,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:48,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892988162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:48,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:48,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 27 [2021-08-12 19:36:48,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429137372] [2021-08-12 19:36:48,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:36:48,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:36:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:36:48,925 INFO L87 Difference]: Start difference. First operand 1230 states and 2406 transitions. Second operand has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-08-12 19:36:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:36:54,787 INFO L93 Difference]: Finished difference Result 2177 states and 4343 transitions. [2021-08-12 19:36:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:36:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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 39 [2021-08-12 19:36:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:36:54,791 INFO L225 Difference]: With dead ends: 2177 [2021-08-12 19:36:54,792 INFO L226 Difference]: Without dead ends: 1948 [2021-08-12 19:36:54,792 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 692.4ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:36:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-08-12 19:36:55,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1359. [2021-08-12 19:36:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 1.9499263622974963) internal successors, (2648), 1358 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:36:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 2648 transitions. [2021-08-12 19:36:55,936 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 2648 transitions. Word has length 39 [2021-08-12 19:36:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:36:55,936 INFO L482 AbstractCegarLoop]: Abstraction has 1359 states and 2648 transitions. [2021-08-12 19:36:55,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 27 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) [2021-08-12 19:36:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 2648 transitions. [2021-08-12 19:36:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:36:55,937 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:36:55,937 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:36:56,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 19:36:56,138 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:36:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:36:56,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1830892405, now seen corresponding path program 64 times [2021-08-12 19:36:56,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:36:56,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749171973] [2021-08-12 19:36:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:36:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:36:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:56,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:36:56,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749171973] [2021-08-12 19:36:56,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749171973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:56,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710671132] [2021-08-12 19:36:56,395 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 [2021-08-12 19:36:56,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:36:56,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:36:56,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:36:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:36:56,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:56,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:56,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:56,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:56,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:36:56,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:36:56,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:36:56,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:36:56,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:36:56,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:36:56,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:36:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:36:56,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710671132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:36:56,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:36:56,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2021-08-12 19:36:56,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753464541] [2021-08-12 19:36:56,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:36:56,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:36:56,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:36:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:36:56,936 INFO L87 Difference]: Start difference. First operand 1359 states and 2648 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:37:05,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:05,801 INFO L93 Difference]: Finished difference Result 2697 states and 5416 transitions. [2021-08-12 19:37:05,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:37:05,801 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 39 [2021-08-12 19:37:05,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:05,806 INFO L225 Difference]: With dead ends: 2697 [2021-08-12 19:37:05,806 INFO L226 Difference]: Without dead ends: 2635 [2021-08-12 19:37:05,806 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:37:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2021-08-12 19:37:06,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 1326. [2021-08-12 19:37:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1325 states have (on average 1.9449056603773585) internal successors, (2577), 1325 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 2577 transitions. [2021-08-12 19:37:06,959 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 2577 transitions. Word has length 39 [2021-08-12 19:37:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:06,959 INFO L482 AbstractCegarLoop]: Abstraction has 1326 states and 2577 transitions. [2021-08-12 19:37:06,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2021-08-12 19:37:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 2577 transitions. [2021-08-12 19:37:06,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:37:06,960 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:06,960 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:07,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 19:37:07,161 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash 834845323, now seen corresponding path program 65 times [2021-08-12 19:37:07,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:07,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229511533] [2021-08-12 19:37:07,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:07,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:07,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229511533] [2021-08-12 19:37:07,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229511533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:07,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046920010] [2021-08-12 19:37:07,420 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 [2021-08-12 19:37:07,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 19:37:07,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:37:07,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-12 19:37:07,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:07,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:07,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:07,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:07,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:07,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:37:07,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:37:07,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:37:07,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:37:07,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:134, output treesize:7 [2021-08-12 19:37:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 1 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:08,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046920010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:08,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:08,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-08-12 19:37:08,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636410210] [2021-08-12 19:37:08,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-08-12 19:37:08,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:08,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-12 19:37:08,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:37:08,008 INFO L87 Difference]: Start difference. First operand 1326 states and 2577 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2021-08-12 19:37:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:16,096 INFO L93 Difference]: Finished difference Result 2532 states and 5111 transitions. [2021-08-12 19:37:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:37:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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 39 [2021-08-12 19:37:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:16,101 INFO L225 Difference]: With dead ends: 2532 [2021-08-12 19:37:16,101 INFO L226 Difference]: Without dead ends: 2290 [2021-08-12 19:37:16,102 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:37:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-08-12 19:37:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1371. [2021-08-12 19:37:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1370 states have (on average 1.9445255474452554) internal successors, (2664), 1370 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:17,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2664 transitions. [2021-08-12 19:37:17,328 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2664 transitions. Word has length 39 [2021-08-12 19:37:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:17,328 INFO L482 AbstractCegarLoop]: Abstraction has 1371 states and 2664 transitions. [2021-08-12 19:37:17,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2021-08-12 19:37:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2664 transitions. [2021-08-12 19:37:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:37:17,329 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:17,329 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:17,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:37:17,530 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:17,530 INFO L82 PathProgramCache]: Analyzing trace with hash 493862395, now seen corresponding path program 66 times [2021-08-12 19:37:17,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:17,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704780263] [2021-08-12 19:37:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:17,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:17,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704780263] [2021-08-12 19:37:17,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704780263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:17,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174914635] [2021-08-12 19:37:17,777 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 [2021-08-12 19:37:17,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:37:17,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:37:17,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:37:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:18,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:18,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:18,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:18,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:37:18,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:37:18,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:37:18,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:37:18,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:37:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:18,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174914635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:18,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:18,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-08-12 19:37:18,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627337679] [2021-08-12 19:37:18,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-08-12 19:37:18,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:18,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-12 19:37:18,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:37:18,351 INFO L87 Difference]: Start difference. First operand 1371 states and 2664 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:37:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:25,531 INFO L93 Difference]: Finished difference Result 1991 states and 3940 transitions. [2021-08-12 19:37:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:37:25,532 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 39 [2021-08-12 19:37:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:25,535 INFO L225 Difference]: With dead ends: 1991 [2021-08-12 19:37:25,535 INFO L226 Difference]: Without dead ends: 1967 [2021-08-12 19:37:25,536 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 628.9ms TimeCoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:37:25,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-08-12 19:37:26,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1374. [2021-08-12 19:37:26,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 1.9446467589220684) internal successors, (2670), 1373 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2670 transitions. [2021-08-12 19:37:26,789 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2670 transitions. Word has length 39 [2021-08-12 19:37:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:26,789 INFO L482 AbstractCegarLoop]: Abstraction has 1374 states and 2670 transitions. [2021-08-12 19:37:26,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2021-08-12 19:37:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2670 transitions. [2021-08-12 19:37:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:37:26,791 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:26,791 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:26,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:37:26,992 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1724860693, now seen corresponding path program 67 times [2021-08-12 19:37:26,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:26,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44512538] [2021-08-12 19:37:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:27,254 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:27,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:27,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44512538] [2021-08-12 19:37:27,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44512538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:27,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855340656] [2021-08-12 19:37:27,254 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 [2021-08-12 19:37:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:27,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:37:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:27,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:27,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:37:27,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:37:27,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:37:27,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:37:27,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:37:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:27,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855340656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:27,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:27,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-08-12 19:37:27,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425899957] [2021-08-12 19:37:27,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:37:27,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:27,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:37:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:37:27,805 INFO L87 Difference]: Start difference. First operand 1374 states and 2670 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:40,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:40,484 INFO L93 Difference]: Finished difference Result 3160 states and 6450 transitions. [2021-08-12 19:37:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:37:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:37:40,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:40,489 INFO L225 Difference]: With dead ends: 3160 [2021-08-12 19:37:40,489 INFO L226 Difference]: Without dead ends: 3018 [2021-08-12 19:37:40,490 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:37:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2021-08-12 19:37:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 795. [2021-08-12 19:37:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 2.013853904282116) internal successors, (1599), 794 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1599 transitions. [2021-08-12 19:37:41,440 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1599 transitions. Word has length 39 [2021-08-12 19:37:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:41,440 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1599 transitions. [2021-08-12 19:37:41,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1599 transitions. [2021-08-12 19:37:41,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:37:41,441 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:41,441 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:41,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:37:41,642 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1458815419, now seen corresponding path program 68 times [2021-08-12 19:37:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:41,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089116779] [2021-08-12 19:37:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:41,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089116779] [2021-08-12 19:37:41,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089116779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:41,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769043359] [2021-08-12 19:37:41,887 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 [2021-08-12 19:37:41,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:37:41,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:37:41,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:37:41,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:42,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:42,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:42,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:42,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:37:42,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:37:42,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:37:42,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:37:42,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:37:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:42,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769043359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:42,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:42,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-08-12 19:37:42,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403156390] [2021-08-12 19:37:42,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:37:42,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:37:42,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:37:42,424 INFO L87 Difference]: Start difference. First operand 795 states and 1599 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:52,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:37:52,989 INFO L93 Difference]: Finished difference Result 2072 states and 4265 transitions. [2021-08-12 19:37:52,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:37:52,993 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:37:52,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:37:52,997 INFO L225 Difference]: With dead ends: 2072 [2021-08-12 19:37:52,997 INFO L226 Difference]: Without dead ends: 2009 [2021-08-12 19:37:52,997 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 604.7ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:37:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-08-12 19:37:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 786. [2021-08-12 19:37:53,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 2.0140127388535034) internal successors, (1581), 785 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1581 transitions. [2021-08-12 19:37:53,933 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1581 transitions. Word has length 39 [2021-08-12 19:37:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:37:53,933 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 1581 transitions. [2021-08-12 19:37:53,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:37:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1581 transitions. [2021-08-12 19:37:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:37:53,934 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:37:53,934 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:37:54,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-12 19:37:54,135 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:37:54,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:37:54,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1117832491, now seen corresponding path program 69 times [2021-08-12 19:37:54,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:37:54,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923245911] [2021-08-12 19:37:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:37:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:37:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:54,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:37:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923245911] [2021-08-12 19:37:54,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923245911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:54,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005953995] [2021-08-12 19:37:54,382 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 [2021-08-12 19:37:54,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:37:54,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:37:54,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:37:54,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:37:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:54,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:54,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:37:54,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:37:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:37:54,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:37:54,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:37:54,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:37:54,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:37:54,944 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:37:54,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005953995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:37:54,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:37:54,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 28 [2021-08-12 19:37:54,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887503634] [2021-08-12 19:37:54,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:37:54,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:37:54,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:37:54,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:37:54,945 INFO L87 Difference]: Start difference. First operand 786 states and 1581 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:38:04,533 INFO L93 Difference]: Finished difference Result 1868 states and 3847 transitions. [2021-08-12 19:38:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:38:04,533 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:38:04,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:38:04,536 INFO L225 Difference]: With dead ends: 1868 [2021-08-12 19:38:04,536 INFO L226 Difference]: Without dead ends: 1802 [2021-08-12 19:38:04,537 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:38:04,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-08-12 19:38:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 792. [2021-08-12 19:38:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 2.013906447534766) internal successors, (1593), 791 states have internal predecessors, (1593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1593 transitions. [2021-08-12 19:38:05,488 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1593 transitions. Word has length 39 [2021-08-12 19:38:05,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:38:05,489 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 1593 transitions. [2021-08-12 19:38:05,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:05,489 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1593 transitions. [2021-08-12 19:38:05,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:38:05,490 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:38:05,490 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:38:05,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:38:05,690 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:38:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:38:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash 350255179, now seen corresponding path program 70 times [2021-08-12 19:38:05,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:38:05,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868722927] [2021-08-12 19:38:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:38:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:05,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:38:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868722927] [2021-08-12 19:38:05,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868722927] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:05,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297808245] [2021-08-12 19:38:05,915 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 [2021-08-12 19:38:05,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:38:05,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:38:05,939 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:38:05,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:38:06,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:06,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:06,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:06,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:06,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:38:06,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:38:06,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:38:06,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:38:06,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:38:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:06,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297808245] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:06,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:38:06,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 25 [2021-08-12 19:38:06,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483704864] [2021-08-12 19:38:06,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:38:06,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:38:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:38:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:38:06,440 INFO L87 Difference]: Start difference. First operand 792 states and 1593 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-08-12 19:38:12,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:38:12,896 INFO L93 Difference]: Finished difference Result 1713 states and 3463 transitions. [2021-08-12 19:38:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:38:12,897 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 39 [2021-08-12 19:38:12,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:38:12,900 INFO L225 Difference]: With dead ends: 1713 [2021-08-12 19:38:12,900 INFO L226 Difference]: Without dead ends: 1381 [2021-08-12 19:38:12,901 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 818.2ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:38:12,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-08-12 19:38:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 885. [2021-08-12 19:38:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.005656108597285) internal successors, (1773), 884 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:38:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1773 transitions. [2021-08-12 19:38:13,956 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1773 transitions. Word has length 39 [2021-08-12 19:38:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:38:13,956 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 1773 transitions. [2021-08-12 19:38:13,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-08-12 19:38:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1773 transitions. [2021-08-12 19:38:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:38:13,957 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:38:13,957 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:38:14,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:38:14,161 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:38:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:38:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash -154414005, now seen corresponding path program 71 times [2021-08-12 19:38:14,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:38:14,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097260379] [2021-08-12 19:38:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:38:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:38:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:14,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:38:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097260379] [2021-08-12 19:38:14,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097260379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:14,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028776091] [2021-08-12 19:38:14,405 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 [2021-08-12 19:38:14,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:38:14,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:38:14,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-12 19:38:14,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:38:17,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:17,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:17,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:38:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:38:17,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 38 [2021-08-12 19:38:17,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:38:17,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:38:17,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:38:17,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:3 [2021-08-12 19:38:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:38:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028776091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:38:17,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:38:17,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-12 19:38:17,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660043353] [2021-08-12 19:38:17,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-08-12 19:38:17,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:38:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-12 19:38:17,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=962, Unknown=1, NotChecked=0, Total=1056 [2021-08-12 19:38:17,958 INFO L87 Difference]: Start difference. First operand 885 states and 1773 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:39:49,770 INFO L93 Difference]: Finished difference Result 2778 states and 5578 transitions. [2021-08-12 19:39:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-12 19:39:49,770 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have 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 [2021-08-12 19:39:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:39:49,774 INFO L225 Difference]: With dead ends: 2778 [2021-08-12 19:39:49,774 INFO L226 Difference]: Without dead ends: 2481 [2021-08-12 19:39:49,775 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 37040.6ms TimeCoverageRelationStatistics Valid=392, Invalid=5296, Unknown=12, NotChecked=0, Total=5700 [2021-08-12 19:39:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-08-12 19:39:51,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 1028. [2021-08-12 19:39:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.0136319376825704) internal successors, (2068), 1027 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 2068 transitions. [2021-08-12 19:39:51,031 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 2068 transitions. Word has length 39 [2021-08-12 19:39:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:39:51,031 INFO L482 AbstractCegarLoop]: Abstraction has 1028 states and 2068 transitions. [2021-08-12 19:39:51,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:39:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 2068 transitions. [2021-08-12 19:39:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:39:51,032 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:39:51,032 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:39:51,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:39:51,233 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:39:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:39:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash -495396933, now seen corresponding path program 72 times [2021-08-12 19:39:51,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:39:51,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888081002] [2021-08-12 19:39:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:39:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:39:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:51,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:39:51,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888081002] [2021-08-12 19:39:51,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888081002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:51,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411357554] [2021-08-12 19:39:51,485 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 [2021-08-12 19:39:51,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:39:51,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:39:51,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:39:51,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:39:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:51,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:51,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:39:52,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:39:52,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:39:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:39:52,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:39:52,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:39:52,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:39:52,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:39:52,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:39:52,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:39:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:39:52,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411357554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:39:52,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:39:52,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-08-12 19:39:52,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49372605] [2021-08-12 19:39:52,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:39:52,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:39:52,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:39:52,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:39:52,030 INFO L87 Difference]: Start difference. First operand 1028 states and 2068 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2021-08-12 19:40:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:00,932 INFO L93 Difference]: Finished difference Result 1648 states and 3344 transitions. [2021-08-12 19:40:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:40:00,932 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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 39 [2021-08-12 19:40:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:00,936 INFO L225 Difference]: With dead ends: 1648 [2021-08-12 19:40:00,936 INFO L226 Difference]: Without dead ends: 1624 [2021-08-12 19:40:00,937 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:40:00,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2021-08-12 19:40:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1031. [2021-08-12 19:40:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.013592233009709) internal successors, (2074), 1030 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2074 transitions. [2021-08-12 19:40:02,286 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2074 transitions. Word has length 39 [2021-08-12 19:40:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:02,286 INFO L482 AbstractCegarLoop]: Abstraction has 1031 states and 2074 transitions. [2021-08-12 19:40:02,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 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) [2021-08-12 19:40:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2074 transitions. [2021-08-12 19:40:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:40:02,287 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:02,287 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:02,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-12 19:40:02,497 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:02,497 INFO L82 PathProgramCache]: Analyzing trace with hash -435485973, now seen corresponding path program 73 times [2021-08-12 19:40:02,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:02,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81103899] [2021-08-12 19:40:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:02,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:02,788 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:02,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:02,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81103899] [2021-08-12 19:40:02,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81103899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:02,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700045216] [2021-08-12 19:40:02,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:40:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:02,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:40:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:03,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:03,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:03,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:40:03,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:40:03,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:40:03,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:40:03,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:40:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:03,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700045216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:03,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:03,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-08-12 19:40:03,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621612275] [2021-08-12 19:40:03,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:40:03,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:03,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:40:03,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:40:03,334 INFO L87 Difference]: Start difference. First operand 1031 states and 2074 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-08-12 19:40:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:15,138 INFO L93 Difference]: Finished difference Result 2175 states and 4430 transitions. [2021-08-12 19:40:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:40:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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 [2021-08-12 19:40:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:15,143 INFO L225 Difference]: With dead ends: 2175 [2021-08-12 19:40:15,143 INFO L226 Difference]: Without dead ends: 2130 [2021-08-12 19:40:15,143 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 665.8ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:40:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-08-12 19:40:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1070. [2021-08-12 19:40:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1069 states have (on average 2.0130963517305895) internal successors, (2152), 1069 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 2152 transitions. [2021-08-12 19:40:16,534 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 2152 transitions. Word has length 39 [2021-08-12 19:40:16,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:16,534 INFO L482 AbstractCegarLoop]: Abstraction has 1070 states and 2152 transitions. [2021-08-12 19:40:16,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-08-12 19:40:16,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 2152 transitions. [2021-08-12 19:40:16,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:40:16,535 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:16,535 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:16,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:40:16,736 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash -327707125, now seen corresponding path program 74 times [2021-08-12 19:40:16,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:16,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396356385] [2021-08-12 19:40:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:17,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:17,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396356385] [2021-08-12 19:40:17,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396356385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:17,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337483555] [2021-08-12 19:40:17,017 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 [2021-08-12 19:40:17,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:40:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:40:17,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:40:17,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:17,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:17,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:40:17,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:40:17,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:40:17,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:40:17,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:40:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:17,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337483555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:17,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:17,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-08-12 19:40:17,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284462362] [2021-08-12 19:40:17,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:40:17,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:17,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:40:17,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:40:17,502 INFO L87 Difference]: Start difference. First operand 1070 states and 2152 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-08-12 19:40:25,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:25,098 INFO L93 Difference]: Finished difference Result 1891 states and 3806 transitions. [2021-08-12 19:40:25,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:40:25,098 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 39 [2021-08-12 19:40:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:25,102 INFO L225 Difference]: With dead ends: 1891 [2021-08-12 19:40:25,102 INFO L226 Difference]: Without dead ends: 1614 [2021-08-12 19:40:25,102 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 922.9ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:40:25,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-08-12 19:40:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1130. [2021-08-12 19:40:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.008857395925598) internal successors, (2268), 1129 states have internal predecessors, (2268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 2268 transitions. [2021-08-12 19:40:26,578 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 2268 transitions. Word has length 39 [2021-08-12 19:40:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:26,578 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 2268 transitions. [2021-08-12 19:40:26,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-08-12 19:40:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 2268 transitions. [2021-08-12 19:40:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:40:26,579 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:26,579 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:26,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-12 19:40:26,780 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:26,780 INFO L82 PathProgramCache]: Analyzing trace with hash -853246965, now seen corresponding path program 75 times [2021-08-12 19:40:26,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:26,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428893569] [2021-08-12 19:40:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:27,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:27,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428893569] [2021-08-12 19:40:27,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428893569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:27,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622052711] [2021-08-12 19:40:27,009 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 [2021-08-12 19:40:27,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:40:27,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:40:27,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-12 19:40:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:27,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:27,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:27,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:27,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:27,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-08-12 19:40:27,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:40:27,697 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-08-12 19:40:27,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:40:27,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-08-12 19:40:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:27,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622052711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:27,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:27,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 26 [2021-08-12 19:40:27,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074263453] [2021-08-12 19:40:27,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:40:27,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:27,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:40:27,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:40:27,707 INFO L87 Difference]: Start difference. First operand 1130 states and 2268 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:36,070 INFO L93 Difference]: Finished difference Result 2004 states and 3989 transitions. [2021-08-12 19:40:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:40:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:40:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:36,075 INFO L225 Difference]: With dead ends: 2004 [2021-08-12 19:40:36,075 INFO L226 Difference]: Without dead ends: 1688 [2021-08-12 19:40:36,075 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1379.3ms TimeCoverageRelationStatistics Valid=156, Invalid=1484, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:40:36,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-08-12 19:40:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1157. [2021-08-12 19:40:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1157 states, 1156 states have (on average 2.0051903114186853) internal successors, (2318), 1156 states have internal predecessors, (2318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:37,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1157 states to 1157 states and 2318 transitions. [2021-08-12 19:40:37,610 INFO L78 Accepts]: Start accepts. Automaton has 1157 states and 2318 transitions. Word has length 39 [2021-08-12 19:40:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:37,611 INFO L482 AbstractCegarLoop]: Abstraction has 1157 states and 2318 transitions. [2021-08-12 19:40:37,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1157 states and 2318 transitions. [2021-08-12 19:40:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:40:37,612 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:37,612 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:37,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:40:37,812 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:37,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:37,813 INFO L82 PathProgramCache]: Analyzing trace with hash 909107723, now seen corresponding path program 76 times [2021-08-12 19:40:37,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:37,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228024822] [2021-08-12 19:40:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:38,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:38,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228024822] [2021-08-12 19:40:38,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228024822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:38,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602585882] [2021-08-12 19:40:38,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:40:38,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:40:38,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:40:38,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:40:38,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:38,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:38,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:38,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:38,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:40:38,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:40:38,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:40:38,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:40:38,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:40:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:38,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602585882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:38,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:38,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 23 [2021-08-12 19:40:38,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867750102] [2021-08-12 19:40:38,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:40:38,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:40:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:40:38,532 INFO L87 Difference]: Start difference. First operand 1157 states and 2318 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-08-12 19:40:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:40:48,020 INFO L93 Difference]: Finished difference Result 2392 states and 4793 transitions. [2021-08-12 19:40:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:40:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 39 [2021-08-12 19:40:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:40:48,025 INFO L225 Difference]: With dead ends: 2392 [2021-08-12 19:40:48,025 INFO L226 Difference]: Without dead ends: 2089 [2021-08-12 19:40:48,026 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 878.7ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:40:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-08-12 19:40:50,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1493. [2021-08-12 19:40:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 1.9845844504021448) internal successors, (2961), 1492 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:40:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2961 transitions. [2021-08-12 19:40:50,041 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2961 transitions. Word has length 39 [2021-08-12 19:40:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:40:50,041 INFO L482 AbstractCegarLoop]: Abstraction has 1493 states and 2961 transitions. [2021-08-12 19:40:50,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-08-12 19:40:50,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2961 transitions. [2021-08-12 19:40:50,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:40:50,042 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:40:50,042 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:40:50,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:40:50,253 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:40:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:40:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1471668869, now seen corresponding path program 77 times [2021-08-12 19:40:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:40:50,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837992531] [2021-08-12 19:40:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:40:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:40:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:50,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:40:50,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837992531] [2021-08-12 19:40:50,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837992531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:50,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730167407] [2021-08-12 19:40:50,512 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 [2021-08-12 19:40:50,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:40:50,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:40:50,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:40:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:40:51,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:51,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:51,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:51,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:40:51,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:40:51,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 21 disjoint index pairs (out of 78 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 48 [2021-08-12 19:40:51,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:40:51,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:40:51,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:40:51,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:135, output treesize:7 [2021-08-12 19:40:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:40:51,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730167407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:40:51,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:40:51,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-08-12 19:40:51,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936393816] [2021-08-12 19:40:51,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-08-12 19:40:51,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:40:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-12 19:40:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:40:51,263 INFO L87 Difference]: Start difference. First operand 1493 states and 2961 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-08-12 19:41:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:06,114 INFO L93 Difference]: Finished difference Result 3511 states and 7000 transitions. [2021-08-12 19:41:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 19:41:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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 39 [2021-08-12 19:41:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:06,120 INFO L225 Difference]: With dead ends: 3511 [2021-08-12 19:41:06,120 INFO L226 Difference]: Without dead ends: 3088 [2021-08-12 19:41:06,121 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2156.4ms TimeCoverageRelationStatistics Valid=240, Invalid=2412, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 19:41:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-08-12 19:41:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 1542. [2021-08-12 19:41:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.9798831927319922) internal successors, (3051), 1541 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 3051 transitions. [2021-08-12 19:41:08,212 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 3051 transitions. Word has length 39 [2021-08-12 19:41:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:08,212 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 3051 transitions. [2021-08-12 19:41:08,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 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) [2021-08-12 19:41:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 3051 transitions. [2021-08-12 19:41:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:41:08,213 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:08,213 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:08,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:08,429 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:08,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:08,429 INFO L82 PathProgramCache]: Analyzing trace with hash 63455611, now seen corresponding path program 78 times [2021-08-12 19:41:08,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:08,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153153099] [2021-08-12 19:41:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:08,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:08,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153153099] [2021-08-12 19:41:08,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153153099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:08,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169828489] [2021-08-12 19:41:08,694 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 [2021-08-12 19:41:08,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:41:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:41:08,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:41:08,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:09,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:09,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:09,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:41:09,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:41:09,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:41:09,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:41:09,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:41:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:09,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169828489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:09,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:09,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-08-12 19:41:09,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320378473] [2021-08-12 19:41:09,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:41:09,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:41:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:41:09,165 INFO L87 Difference]: Start difference. First operand 1542 states and 3051 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-08-12 19:41:22,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:22,534 INFO L93 Difference]: Finished difference Result 2927 states and 6002 transitions. [2021-08-12 19:41:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:41:22,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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 39 [2021-08-12 19:41:22,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:22,541 INFO L225 Difference]: With dead ends: 2927 [2021-08-12 19:41:22,541 INFO L226 Difference]: Without dead ends: 2803 [2021-08-12 19:41:22,542 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 555.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:41:22,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2021-08-12 19:41:24,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 1557. [2021-08-12 19:41:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1556 states have (on average 1.9800771208226222) internal successors, (3081), 1556 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 3081 transitions. [2021-08-12 19:41:24,700 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 3081 transitions. Word has length 39 [2021-08-12 19:41:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:24,700 INFO L482 AbstractCegarLoop]: Abstraction has 1557 states and 3081 transitions. [2021-08-12 19:41:24,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2021-08-12 19:41:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 3081 transitions. [2021-08-12 19:41:24,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:41:24,701 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:24,701 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:24,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:24,909 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash 818819387, now seen corresponding path program 79 times [2021-08-12 19:41:24,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:24,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420689029] [2021-08-12 19:41:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:25,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420689029] [2021-08-12 19:41:25,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420689029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141371518] [2021-08-12 19:41:25,158 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 [2021-08-12 19:41:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:25,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:41:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:25,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:25,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:41:25,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:41:25,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:41:25,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:41:25,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:41:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:25,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141371518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:25,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:25,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-08-12 19:41:25,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203055366] [2021-08-12 19:41:25,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:41:25,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:41:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:41:25,572 INFO L87 Difference]: Start difference. First operand 1557 states and 3081 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:35,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:35,611 INFO L93 Difference]: Finished difference Result 2413 states and 4816 transitions. [2021-08-12 19:41:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:41:35,612 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:41:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:35,616 INFO L225 Difference]: With dead ends: 2413 [2021-08-12 19:41:35,616 INFO L226 Difference]: Without dead ends: 2119 [2021-08-12 19:41:35,617 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 872.6ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:41:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-08-12 19:41:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1674. [2021-08-12 19:41:38,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 1.9796772265391511) internal successors, (3312), 1673 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 3312 transitions. [2021-08-12 19:41:38,015 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 3312 transitions. Word has length 39 [2021-08-12 19:41:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:38,015 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 3312 transitions. [2021-08-12 19:41:38,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 3312 transitions. [2021-08-12 19:41:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:41:38,017 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:38,017 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:38,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:38,217 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:38,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:38,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1561957205, now seen corresponding path program 80 times [2021-08-12 19:41:38,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:38,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194906193] [2021-08-12 19:41:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:38,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:38,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194906193] [2021-08-12 19:41:38,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194906193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:38,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330921967] [2021-08-12 19:41:38,430 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 [2021-08-12 19:41:38,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:41:38,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:41:38,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:41:38,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:38,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:38,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:41:38,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:41:38,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:41:38,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:41:38,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:41:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:38,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330921967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:38,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:38,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 22 [2021-08-12 19:41:38,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404914384] [2021-08-12 19:41:38,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:41:38,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:41:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:41:38,831 INFO L87 Difference]: Start difference. First operand 1674 states and 3312 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:41:52,661 INFO L93 Difference]: Finished difference Result 2849 states and 5746 transitions. [2021-08-12 19:41:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:41:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:41:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:41:52,667 INFO L225 Difference]: With dead ends: 2849 [2021-08-12 19:41:52,667 INFO L226 Difference]: Without dead ends: 2791 [2021-08-12 19:41:52,667 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:41:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-08-12 19:41:55,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 1659. [2021-08-12 19:41:55,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 1.9782870928829916) internal successors, (3280), 1658 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 3280 transitions. [2021-08-12 19:41:55,070 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 3280 transitions. Word has length 39 [2021-08-12 19:41:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:41:55,071 INFO L482 AbstractCegarLoop]: Abstraction has 1659 states and 3280 transitions. [2021-08-12 19:41:55,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:41:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 3280 transitions. [2021-08-12 19:41:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:41:55,072 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:41:55,072 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:41:55,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:41:55,273 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:41:55,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:41:55,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1060323669, now seen corresponding path program 81 times [2021-08-12 19:41:55,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:41:55,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864071255] [2021-08-12 19:41:55,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:41:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:41:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:55,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:41:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864071255] [2021-08-12 19:41:55,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864071255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894440187] [2021-08-12 19:41:55,506 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 [2021-08-12 19:41:55,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 19:41:55,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:41:55,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-12 19:41:55,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:41:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:56,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:41:56,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:56,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:41:56,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 48 [2021-08-12 19:41:56,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:41:56,154 INFO L628 ElimStorePlain]: treesize reduction 5, result has 81.5 percent of original size [2021-08-12 19:41:56,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:41:56,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:144, output treesize:7 [2021-08-12 19:41:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:41:56,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894440187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:41:56,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:41:56,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-08-12 19:41:56,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165031134] [2021-08-12 19:41:56,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-08-12 19:41:56,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:41:56,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-12 19:41:56,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:41:56,163 INFO L87 Difference]: Start difference. First operand 1659 states and 3280 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:14,489 INFO L93 Difference]: Finished difference Result 3265 states and 6558 transitions. [2021-08-12 19:42:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 19:42:14,490 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:42:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:14,496 INFO L225 Difference]: With dead ends: 3265 [2021-08-12 19:42:14,496 INFO L226 Difference]: Without dead ends: 3144 [2021-08-12 19:42:14,496 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1344.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:42:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3144 states. [2021-08-12 19:42:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3144 to 1719. [2021-08-12 19:42:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-08-12 19:42:16,984 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-08-12 19:42:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:16,984 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-08-12 19:42:16,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-08-12 19:42:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:42:16,985 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:16,986 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:17,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:17,186 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -26832725, now seen corresponding path program 82 times [2021-08-12 19:42:17,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:17,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971594180] [2021-08-12 19:42:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:17,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:17,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971594180] [2021-08-12 19:42:17,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971594180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:17,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680440076] [2021-08-12 19:42:17,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:42:17,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:42:17,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:17,474 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:42:17,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:17,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:42:17,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:17,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:42:17,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:17,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:17,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:17,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:42:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:17,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680440076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:17,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:17,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-08-12 19:42:17,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500430803] [2021-08-12 19:42:17,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:42:17,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:42:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:42:17,874 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:35,090 INFO L93 Difference]: Finished difference Result 3007 states and 6066 transitions. [2021-08-12 19:42:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:42:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-12 19:42:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:35,096 INFO L225 Difference]: With dead ends: 3007 [2021-08-12 19:42:35,096 INFO L226 Difference]: Without dead ends: 2947 [2021-08-12 19:42:35,096 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 537.9ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:42:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2947 states. [2021-08-12 19:42:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 1719. [2021-08-12 19:42:37,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.980209545983702) internal successors, (3402), 1718 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:37,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 3402 transitions. [2021-08-12 19:42:37,656 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 3402 transitions. Word has length 39 [2021-08-12 19:42:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:37,656 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 3402 transitions. [2021-08-12 19:42:37,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 3402 transitions. [2021-08-12 19:42:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-12 19:42:37,658 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:37,658 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:37,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-12 19:42:37,858 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:37,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2007368901, now seen corresponding path program 83 times [2021-08-12 19:42:37,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:37,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788606722] [2021-08-12 19:42:37,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:38,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:38,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788606722] [2021-08-12 19:42:38,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788606722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:38,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196331040] [2021-08-12 19:42:38,150 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 [2021-08-12 19:42:38,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 19:42:38,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:38,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-12 19:42:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:38,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:42:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:38,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:42:38,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:38,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:38,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:38,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:42:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:38,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196331040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:38,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:38,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-08-12 19:42:38,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381424201] [2021-08-12 19:42:38,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:42:38,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:38,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:42:38,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:42:38,608 INFO L87 Difference]: Start difference. First operand 1719 states and 3402 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) [2021-08-12 19:42:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:42:53,674 INFO L93 Difference]: Finished difference Result 2609 states and 5201 transitions. [2021-08-12 19:42:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:42:53,675 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 39 [2021-08-12 19:42:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:42:53,679 INFO L225 Difference]: With dead ends: 2609 [2021-08-12 19:42:53,680 INFO L226 Difference]: Without dead ends: 2553 [2021-08-12 19:42:53,680 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:42:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2021-08-12 19:42:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 1750. [2021-08-12 19:42:56,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1750 states, 1749 states have (on average 1.979416809605489) internal successors, (3462), 1749 states have internal predecessors, (3462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:42:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 3462 transitions. [2021-08-12 19:42:56,380 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 3462 transitions. Word has length 39 [2021-08-12 19:42:56,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:42:56,380 INFO L482 AbstractCegarLoop]: Abstraction has 1750 states and 3462 transitions. [2021-08-12 19:42:56,380 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) [2021-08-12 19:42:56,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 3462 transitions. [2021-08-12 19:42:56,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-12 19:42:56,382 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:42:56,382 INFO L550 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:42:56,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:42:56,582 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:42:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:42:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1770592930, now seen corresponding path program 84 times [2021-08-12 19:42:56,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:42:56,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857915731] [2021-08-12 19:42:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:42:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:42:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:56,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:42:56,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857915731] [2021-08-12 19:42:56,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857915731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:56,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229496747] [2021-08-12 19:42:56,826 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 [2021-08-12 19:42:56,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 19:42:56,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:42:56,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-12 19:42:56,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:42:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:42:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:42:57,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:42:57,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 48 [2021-08-12 19:42:57,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:42:57,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:42:57,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:42:57,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:132, output treesize:7 [2021-08-12 19:42:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:42:57,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229496747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:42:57,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:42:57,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 24 [2021-08-12 19:42:57,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282460046] [2021-08-12 19:42:57,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:42:57,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:42:57,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:42:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:42:57,277 INFO L87 Difference]: Start difference. First operand 1750 states and 3462 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 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) Received shutdown request... [2021-08-12 19:43:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 19:43:15,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-12 19:43:15,337 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:43:15,340 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:43:15,341 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:43:15,341 INFO L202 PluginConnector]: Adding new model send-receive-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:43:15 BasicIcfg [2021-08-12 19:43:15,341 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:43:15,342 INFO L168 Benchmark]: Toolchain (without parser) took 577746.79 ms. Allocated memory was 215.0 MB in the beginning and 777.0 MB in the end (delta: 562.0 MB). Free memory was 196.2 MB in the beginning and 568.1 MB in the end (delta: -371.9 MB). Peak memory consumption was 612.3 MB. Max. memory is 8.0 GB. [2021-08-12 19:43:15,342 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 215.0 MB. Free memory is still 197.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:43:15,342 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.22 ms. Allocated memory is still 215.0 MB. Free memory was 196.1 MB in the beginning and 194.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:43:15,342 INFO L168 Benchmark]: Boogie Preprocessor took 12.81 ms. Allocated memory is still 215.0 MB. Free memory was 194.7 MB in the beginning and 193.8 MB in the end (delta: 922.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:43:15,342 INFO L168 Benchmark]: RCFGBuilder took 171.76 ms. Allocated memory is still 215.0 MB. Free memory was 193.8 MB in the beginning and 181.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-12 19:43:15,342 INFO L168 Benchmark]: TraceAbstraction took 577537.79 ms. Allocated memory was 215.0 MB in the beginning and 777.0 MB in the end (delta: 562.0 MB). Free memory was 181.1 MB in the beginning and 568.1 MB in the end (delta: -387.0 MB). Peak memory consumption was 597.6 MB. Max. memory is 8.0 GB. [2021-08-12 19:43:15,342 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 0.12 ms. Allocated memory is still 215.0 MB. Free memory is still 197.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.22 ms. Allocated memory is still 215.0 MB. Free memory was 196.1 MB in the beginning and 194.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.81 ms. Allocated memory is still 215.0 MB. Free memory was 194.7 MB in the beginning and 193.8 MB in the end (delta: 922.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 171.76 ms. Allocated memory is still 215.0 MB. Free memory was 193.8 MB in the beginning and 181.5 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 577537.79 ms. Allocated memory was 215.0 MB in the beginning and 777.0 MB in the end (delta: 562.0 MB). Free memory was 181.1 MB in the beginning and 568.1 MB in the end (delta: -387.0 MB). Peak memory consumption was 597.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1750states) and FLOYD_HOARE automaton (currently 40 states, 25 states before enhancement),while ReachableStatesComputation was computing reachable states (3234 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 577475.3ms, OverallIterations: 90, TraceHistogramMax: 8, EmptinessCheckTime: 81.4ms, AutomataDifference: 454285.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5809 SDtfs, 10142 SDslu, 68143 SDs, 0 SdLazy, 38166 SolverSat, 1704 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 69613.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4289 GetRequests, 2030 SyntacticMatches, 261 SemanticMatches, 1998 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12911 ImplicationChecksByTransitivity, 82432.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1750occurred in iteration=89, InterpolantAutomatonStates: 1792, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52231.8ms AutomataMinimizationTime, 89 MinimizatonAttempts, 48373 StatesRemovedByMinimization, 87 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 290.1ms SsaConstructionTime, 1284.2ms SatisfiabilityAnalysisTime, 49640.1ms InterpolantComputationTime, 5784 NumberOfCodeBlocks, 5784 NumberOfCodeBlocksAsserted, 411 NumberOfCheckSat, 5608 ConstructedInterpolants, 323 QuantifiedInterpolants, 158310 SizeOfPredicates, 96 NumberOfNonLiveVariables, 7262 ConjunctsInSsa, 3784 ConjunctsInUnsatCore, 176 InterpolantComputations, 4 PerfectInterpolantSequences, 331/10135 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown