/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 22:50:46,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 22:50:46,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 22:50:47,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 22:50:47,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 22:50:47,056 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 22:50:47,056 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 22:50:47,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 22:50:47,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 22:50:47,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 22:50:47,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 22:50:47,058 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 22:50:47,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 22:50:47,058 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 22:50:47,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 22:50:47,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 22:50:47,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 22:50:47,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 22:50:47,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 22:50:47,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 22:50:47,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 22:50:47,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 22:50:47,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:50:47,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 22:50:47,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 22:50:47,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 22:50:47,061 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 22:50:47,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 22:50:47,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 22:50:47,306 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 22:50:47,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 22:50:47,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 22:50:47,329 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 22:50:47,330 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 22:50:47,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl [2021-06-05 22:50:47,331 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/horseshoe.wvr.bpl' [2021-06-05 22:50:47,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 22:50:47,349 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 22:50:47,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 22:50:47,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 22:50:47,350 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 22:50:47,359 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 22:50:47,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 22:50:47,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 22:50:47,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 22:50:47,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,376 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,378 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... [2021-06-05 22:50:47,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 22:50:47,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 22:50:47,382 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 22:50:47,382 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 22:50:47,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 22:50:47,440 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 22:50:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 22:50:47,441 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 22:50:47,441 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 22:50:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 22:50:47,441 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 22:50:47,441 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 22:50:47,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 22:50:47,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 22:50:47,442 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 22:50:47,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 22:50:47,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 22:50:47,442 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 22:50:47,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 22:50:47,673 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 22:50:47,674 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:50:47 BoogieIcfgContainer [2021-06-05 22:50:47,674 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 22:50:47,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 22:50:47,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 22:50:47,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 22:50:47,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 10:50:47" (1/2) ... [2021-06-05 22:50:47,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@320f6df9 and model type horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 10:50:47, skipping insertion in model container [2021-06-05 22:50:47,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 10:50:47" (2/2) ... [2021-06-05 22:50:47,679 INFO L111 eAbstractionObserver]: Analyzing ICFG horseshoe.wvr.bpl [2021-06-05 22:50:47,683 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 22:50:47,683 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 22:50:47,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 22:50:47,683 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 22:50:47,722 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 22:50:47,735 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 22:50:47,746 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 22:50:47,746 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 22:50:47,746 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 22:50:47,746 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 22:50:47,746 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 22:50:47,746 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 22:50:47,747 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 22:50:47,747 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 22:50:47,752 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 33 transitions, 90 flow [2021-06-05 22:50:47,801 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:47,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 22:50:47,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:47,818 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:47,818 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:47,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1822169931, now seen corresponding path program 1 times [2021-06-05 22:50:47,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:47,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581489541] [2021-06-05 22:50:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:47,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:47,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581489541] [2021-06-05 22:50:47,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581489541] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:50:47,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:50:47,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:50:47,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455055515] [2021-06-05 22:50:47,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:50:47,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:47,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:50:47,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:50:47,963 INFO L87 Difference]: Start difference. First operand has 355 states, 353 states have (on average 2.943342776203966) internal successors, (1039), 354 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:48,008 INFO L93 Difference]: Finished difference Result 401 states and 1181 transitions. [2021-06-05 22:50:48,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:50:48,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 22:50:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:48,027 INFO L225 Difference]: With dead ends: 401 [2021-06-05 22:50:48,027 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 22:50:48,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:50:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 22:50:48,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-06-05 22:50:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.9525) internal successors, (1181), 400 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1181 transitions. [2021-06-05 22:50:48,094 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1181 transitions. Word has length 16 [2021-06-05 22:50:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:48,094 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 1181 transitions. [2021-06-05 22:50:48,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,094 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1181 transitions. [2021-06-05 22:50:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 22:50:48,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:48,100 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:48,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 22:50:48,100 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:48,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2093701423, now seen corresponding path program 1 times [2021-06-05 22:50:48,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:48,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628507370] [2021-06-05 22:50:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:48,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:48,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628507370] [2021-06-05 22:50:48,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628507370] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:50:48,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:50:48,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:50:48,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421928715] [2021-06-05 22:50:48,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:50:48,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:50:48,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:50:48,130 INFO L87 Difference]: Start difference. First operand 401 states and 1181 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:48,144 INFO L93 Difference]: Finished difference Result 458 states and 1351 transitions. [2021-06-05 22:50:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:50:48,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 22:50:48,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:48,149 INFO L225 Difference]: With dead ends: 458 [2021-06-05 22:50:48,150 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 22:50:48,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:50:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 22:50:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 458. [2021-06-05 22:50:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.9562363238512037) internal successors, (1351), 457 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1351 transitions. [2021-06-05 22:50:48,175 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1351 transitions. Word has length 21 [2021-06-05 22:50:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:48,176 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1351 transitions. [2021-06-05 22:50:48,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1351 transitions. [2021-06-05 22:50:48,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:50:48,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:48,177 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:48,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 22:50:48,178 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 412173230, now seen corresponding path program 1 times [2021-06-05 22:50:48,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:48,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210152924] [2021-06-05 22:50:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:48,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:48,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210152924] [2021-06-05 22:50:48,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210152924] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:50:48,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 22:50:48,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 22:50:48,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801128376] [2021-06-05 22:50:48,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 22:50:48,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:48,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 22:50:48,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:50:48,218 INFO L87 Difference]: Start difference. First operand 458 states and 1351 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:48,227 INFO L93 Difference]: Finished difference Result 463 states and 1345 transitions. [2021-06-05 22:50:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 22:50:48,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 22:50:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:48,230 INFO L225 Difference]: With dead ends: 463 [2021-06-05 22:50:48,230 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 22:50:48,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 22:50:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 22:50:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 463. [2021-06-05 22:50:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.911255411255411) internal successors, (1345), 462 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1345 transitions. [2021-06-05 22:50:48,242 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1345 transitions. Word has length 25 [2021-06-05 22:50:48,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:48,243 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1345 transitions. [2021-06-05 22:50:48,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1345 transitions. [2021-06-05 22:50:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:50:48,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:48,244 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:48,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 22:50:48,244 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1863818432, now seen corresponding path program 2 times [2021-06-05 22:50:48,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:48,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220001101] [2021-06-05 22:50:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:48,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:48,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220001101] [2021-06-05 22:50:48,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220001101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:48,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171194435] [2021-06-05 22:50:48,509 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:48,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:50:48,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:48,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:50:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:48,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:50:48,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:48,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:48,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:48,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 22:50:48,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:50:48,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:48,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:48,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:48,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-06-05 22:50:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:48,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171194435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:48,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:48,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 22:50:48,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349306574] [2021-06-05 22:50:48,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 22:50:48,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:48,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 22:50:48,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 22:50:48,971 INFO L87 Difference]: Start difference. First operand 463 states and 1345 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:49,800 INFO L93 Difference]: Finished difference Result 1470 states and 4324 transitions. [2021-06-05 22:50:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:50:49,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 25 [2021-06-05 22:50:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:49,806 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 22:50:49,806 INFO L226 Difference]: Without dead ends: 1408 [2021-06-05 22:50:49,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 742.6ms TimeCoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:50:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-06-05 22:50:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 637. [2021-06-05 22:50:49,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 2.9276729559748427) internal successors, (1862), 636 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1862 transitions. [2021-06-05 22:50:49,823 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1862 transitions. Word has length 25 [2021-06-05 22:50:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:49,824 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 1862 transitions. [2021-06-05 22:50:49,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1862 transitions. [2021-06-05 22:50:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 22:50:49,825 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:49,825 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:50,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:50,034 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:50,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:50,035 INFO L82 PathProgramCache]: Analyzing trace with hash -734842624, now seen corresponding path program 3 times [2021-06-05 22:50:50,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:50,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903480528] [2021-06-05 22:50:50,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:50,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:50,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903480528] [2021-06-05 22:50:50,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903480528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:50,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334641867] [2021-06-05 22:50:50,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:50,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 22:50:50,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:50,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 22:50:50,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:50,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:50:50,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:50,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:50,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:50,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 22:50:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-06-05 22:50:50,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:50,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:50,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:50,358 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:15 [2021-06-05 22:50:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:50,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334641867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:50,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:50,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 22:50:50,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022869761] [2021-06-05 22:50:50,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 22:50:50,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 22:50:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:50:50,528 INFO L87 Difference]: Start difference. First operand 637 states and 1862 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:51,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:51,154 INFO L93 Difference]: Finished difference Result 1386 states and 3964 transitions. [2021-06-05 22:50:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 22:50:51,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 25 [2021-06-05 22:50:51,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:51,159 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 22:50:51,159 INFO L226 Difference]: Without dead ends: 1334 [2021-06-05 22:50:51,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 22:50:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2021-06-05 22:50:51,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 755. [2021-06-05 22:50:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.8779840848806364) internal successors, (2170), 754 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2170 transitions. [2021-06-05 22:50:51,179 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2170 transitions. Word has length 25 [2021-06-05 22:50:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:51,179 INFO L482 AbstractCegarLoop]: Abstraction has 755 states and 2170 transitions. [2021-06-05 22:50:51,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2170 transitions. [2021-06-05 22:50:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 22:50:51,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:51,181 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:51,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:51,397 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:51,400 INFO L82 PathProgramCache]: Analyzing trace with hash -641687495, now seen corresponding path program 1 times [2021-06-05 22:50:51,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:51,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961973999] [2021-06-05 22:50:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:51,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961973999] [2021-06-05 22:50:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961973999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:51,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816493121] [2021-06-05 22:50:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 22:50:51,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:51,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:50:51,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:51,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:51,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:51,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 22:50:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816493121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:51,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:51,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 22:50:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942316223] [2021-06-05 22:50:51,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 22:50:51,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:51,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 22:50:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 22:50:51,554 INFO L87 Difference]: Start difference. First operand 755 states and 2170 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:51,599 INFO L93 Difference]: Finished difference Result 972 states and 2800 transitions. [2021-06-05 22:50:51,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 22:50:51,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 22:50:51,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:51,603 INFO L225 Difference]: With dead ends: 972 [2021-06-05 22:50:51,603 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 22:50:51,604 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 22:50:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 22:50:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 773. [2021-06-05 22:50:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 2.873056994818653) internal successors, (2218), 772 states have internal predecessors, (2218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2218 transitions. [2021-06-05 22:50:51,618 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2218 transitions. Word has length 28 [2021-06-05 22:50:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:51,618 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2218 transitions. [2021-06-05 22:50:51,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:51,618 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2218 transitions. [2021-06-05 22:50:51,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 22:50:51,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:51,620 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:51,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:51,833 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1280680323, now seen corresponding path program 4 times [2021-06-05 22:50:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:51,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158695135] [2021-06-05 22:50:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:51,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:51,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158695135] [2021-06-05 22:50:51,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158695135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:51,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476293203] [2021-06-05 22:50:51,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:51,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:50:51,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:51,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:50:51,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:51,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 22:50:51,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476293203] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:50:51,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:50:51,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-06-05 22:50:51,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058237742] [2021-06-05 22:50:51,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:50:51,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:51,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:50:51,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:50:51,988 INFO L87 Difference]: Start difference. First operand 773 states and 2218 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:51,999 INFO L93 Difference]: Finished difference Result 1430 states and 4086 transitions. [2021-06-05 22:50:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:50:51,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 22:50:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:52,004 INFO L225 Difference]: With dead ends: 1430 [2021-06-05 22:50:52,004 INFO L226 Difference]: Without dead ends: 1364 [2021-06-05 22:50:52,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 22:50:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-06-05 22:50:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1108. [2021-06-05 22:50:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 2.962962962962963) internal successors, (3280), 1107 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) [2021-06-05 22:50:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3280 transitions. [2021-06-05 22:50:52,027 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3280 transitions. Word has length 29 [2021-06-05 22:50:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:52,028 INFO L482 AbstractCegarLoop]: Abstraction has 1108 states and 3280 transitions. [2021-06-05 22:50:52,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:52,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3280 transitions. [2021-06-05 22:50:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 22:50:52,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:52,032 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:52,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:52,245 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1936406216, now seen corresponding path program 5 times [2021-06-05 22:50:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:52,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615783955] [2021-06-05 22:50:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:52,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:52,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615783955] [2021-06-05 22:50:52,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615783955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:52,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431125928] [2021-06-05 22:50:52,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:52,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 22:50:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:52,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 22:50:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:52,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431125928] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 22:50:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 22:50:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-06-05 22:50:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103285252] [2021-06-05 22:50:52,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 22:50:52,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:52,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 22:50:52,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:50:52,376 INFO L87 Difference]: Start difference. First operand 1108 states and 3280 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:52,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:52,397 INFO L93 Difference]: Finished difference Result 3088 states and 9151 transitions. [2021-06-05 22:50:52,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 22:50:52,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 22:50:52,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:52,409 INFO L225 Difference]: With dead ends: 3088 [2021-06-05 22:50:52,409 INFO L226 Difference]: Without dead ends: 2925 [2021-06-05 22:50:52,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 22:50:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2925 states. [2021-06-05 22:50:52,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2925 to 2475. [2021-06-05 22:50:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.0731608730800324) internal successors, (7603), 2474 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:52,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 7603 transitions. [2021-06-05 22:50:52,462 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 7603 transitions. Word has length 30 [2021-06-05 22:50:52,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:52,462 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 7603 transitions. [2021-06-05 22:50:52,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:52,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 7603 transitions. [2021-06-05 22:50:52,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 22:50:52,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:52,466 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:52,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:52,673 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2026861479, now seen corresponding path program 2 times [2021-06-05 22:50:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:52,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739571917] [2021-06-05 22:50:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:50:52,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:52,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739571917] [2021-06-05 22:50:52,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739571917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:52,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280233644] [2021-06-05 22:50:52,733 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:52,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:50:52,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:52,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 22:50:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:52,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 22:50:52,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:52,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:52,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:52,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 22:50:52,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 22:50:52,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:52,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:52,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:52,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 22:50:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 22:50:52,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280233644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:52,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:52,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 22:50:52,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623493270] [2021-06-05 22:50:52,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 22:50:52,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 22:50:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 22:50:52,895 INFO L87 Difference]: Start difference. First operand 2475 states and 7603 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:53,042 INFO L93 Difference]: Finished difference Result 3669 states and 11137 transitions. [2021-06-05 22:50:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 22:50:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 33 [2021-06-05 22:50:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:53,055 INFO L225 Difference]: With dead ends: 3669 [2021-06-05 22:50:53,055 INFO L226 Difference]: Without dead ends: 3669 [2021-06-05 22:50:53,055 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 22:50:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3669 states. [2021-06-05 22:50:53,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3669 to 3342. [2021-06-05 22:50:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3341 states have (on average 3.0634540556719547) internal successors, (10235), 3341 states have internal predecessors, (10235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 10235 transitions. [2021-06-05 22:50:53,132 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 10235 transitions. Word has length 33 [2021-06-05 22:50:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:53,132 INFO L482 AbstractCegarLoop]: Abstraction has 3342 states and 10235 transitions. [2021-06-05 22:50:53,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 10235 transitions. [2021-06-05 22:50:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:50:53,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:53,138 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:53,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:53,353 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash -905518150, now seen corresponding path program 3 times [2021-06-05 22:50:53,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:53,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127508579] [2021-06-05 22:50:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:53,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:53,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127508579] [2021-06-05 22:50:53,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127508579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:53,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095408668] [2021-06-05 22:50:53,766 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:53,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:50:53,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:50:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:54,204 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:50:54,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 22:50:54,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:54,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:54,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:54,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 22:50:54,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:50:54,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:50:54,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 22:50:54,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:54,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:54,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:54,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-06-05 22:50:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:54,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095408668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:54,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:54,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 22:50:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026132905] [2021-06-05 22:50:54,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 22:50:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 22:50:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:50:54,582 INFO L87 Difference]: Start difference. First operand 3342 states and 10235 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:50:57,711 INFO L93 Difference]: Finished difference Result 6187 states and 18347 transitions. [2021-06-05 22:50:57,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:50:57,712 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:50:57,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:50:57,739 INFO L225 Difference]: With dead ends: 6187 [2021-06-05 22:50:57,740 INFO L226 Difference]: Without dead ends: 5968 [2021-06-05 22:50:57,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 2590.1ms TimeCoverageRelationStatistics Valid=513, Invalid=5649, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:50:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5968 states. [2021-06-05 22:50:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5968 to 4135. [2021-06-05 22:50:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4135 states, 4134 states have (on average 3.0246734397677795) internal successors, (12504), 4134 states have internal predecessors, (12504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 12504 transitions. [2021-06-05 22:50:57,858 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 12504 transitions. Word has length 37 [2021-06-05 22:50:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:50:57,860 INFO L482 AbstractCegarLoop]: Abstraction has 4135 states and 12504 transitions. [2021-06-05 22:50:57,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:50:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 12504 transitions. [2021-06-05 22:50:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:50:57,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:50:57,867 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:50:58,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 22:50:58,081 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:50:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:50:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash 790788090, now seen corresponding path program 4 times [2021-06-05 22:50:58,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:50:58,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845241921] [2021-06-05 22:50:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:50:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:50:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:58,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:50:58,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845241921] [2021-06-05 22:50:58,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845241921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:58,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425526604] [2021-06-05 22:50:58,475 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:50:58,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:50:58,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:50:58,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:50:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:50:58,890 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:50:58,890 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 25 treesize of output 13 [2021-06-05 22:50:58,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:58,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:58,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:58,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:50:58,981 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:50:58,981 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 29 treesize of output 17 [2021-06-05 22:50:58,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:50:58,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:50:58,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:50:58,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:50:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:50:59,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425526604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:50:59,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:50:59,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 22:50:59,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70273618] [2021-06-05 22:50:59,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:50:59,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:50:59,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:50:59,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1178, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:50:59,240 INFO L87 Difference]: Start difference. First operand 4135 states and 12504 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:01,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:01,657 INFO L93 Difference]: Finished difference Result 4979 states and 14733 transitions. [2021-06-05 22:51:01,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:51:01,657 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:01,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:01,666 INFO L225 Difference]: With dead ends: 4979 [2021-06-05 22:51:01,666 INFO L226 Difference]: Without dead ends: 4828 [2021-06-05 22:51:01,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1670.7ms TimeCoverageRelationStatistics Valid=206, Invalid=2986, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:51:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-06-05 22:51:01,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4306. [2021-06-05 22:51:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 4305 states have (on average 3.0011614401858306) internal successors, (12920), 4305 states have internal predecessors, (12920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 12920 transitions. [2021-06-05 22:51:01,750 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 12920 transitions. Word has length 37 [2021-06-05 22:51:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:01,750 INFO L482 AbstractCegarLoop]: Abstraction has 4306 states and 12920 transitions. [2021-06-05 22:51:01,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 12920 transitions. [2021-06-05 22:51:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:01,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:01,757 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:01,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 22:51:01,973 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:01,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:01,974 INFO L82 PathProgramCache]: Analyzing trace with hash 608631128, now seen corresponding path program 5 times [2021-06-05 22:51:01,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:01,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565641691] [2021-06-05 22:51:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:02,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:02,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565641691] [2021-06-05 22:51:02,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565641691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:02,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520118548] [2021-06-05 22:51:02,359 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:02,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:51:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:51:02,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:02,733 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:02,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:51:02,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:02,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:02,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:02,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:51:02,832 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:02,832 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 29 treesize of output 17 [2021-06-05 22:51:02,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:02,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:02,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:02,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:03,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520118548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:03,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:03,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:51:03,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577729628] [2021-06-05 22:51:03,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:03,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:03,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:03,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:03,060 INFO L87 Difference]: Start difference. First operand 4306 states and 12920 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:06,016 INFO L93 Difference]: Finished difference Result 7343 states and 21553 transitions. [2021-06-05 22:51:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:51:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:06,030 INFO L225 Difference]: With dead ends: 7343 [2021-06-05 22:51:06,030 INFO L226 Difference]: Without dead ends: 7124 [2021-06-05 22:51:06,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2396.5ms TimeCoverageRelationStatistics Valid=551, Invalid=5611, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:51:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7124 states. [2021-06-05 22:51:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7124 to 4369. [2021-06-05 22:51:06,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 4368 states have (on average 3.001144688644689) internal successors, (13109), 4368 states have internal predecessors, (13109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 13109 transitions. [2021-06-05 22:51:06,141 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 13109 transitions. Word has length 37 [2021-06-05 22:51:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:06,142 INFO L482 AbstractCegarLoop]: Abstraction has 4369 states and 13109 transitions. [2021-06-05 22:51:06,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 13109 transitions. [2021-06-05 22:51:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:06,149 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:06,149 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:06,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:06,367 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1990029928, now seen corresponding path program 6 times [2021-06-05 22:51:06,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:06,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379205554] [2021-06-05 22:51:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:06,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:06,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379205554] [2021-06-05 22:51:06,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379205554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:06,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845321631] [2021-06-05 22:51:06,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:06,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:51:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:06,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:51:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:07,029 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:07,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:51:07,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:07,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:07,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:07,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:51:07,114 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:07,114 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 29 treesize of output 17 [2021-06-05 22:51:07,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:07,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:07,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:07,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:07,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845321631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:07,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:07,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 22:51:07,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674547854] [2021-06-05 22:51:07,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 22:51:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:07,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 22:51:07,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:51:07,232 INFO L87 Difference]: Start difference. First operand 4369 states and 13109 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:08,082 INFO L93 Difference]: Finished difference Result 4696 states and 13935 transitions. [2021-06-05 22:51:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 22:51:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:08,091 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 22:51:08,091 INFO L226 Difference]: Without dead ends: 4639 [2021-06-05 22:51:08,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1016.9ms TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:51:08,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-06-05 22:51:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 4432. [2021-06-05 22:51:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 4431 states have (on average 2.993680884676145) internal successors, (13265), 4431 states have internal predecessors, (13265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:08,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 13265 transitions. [2021-06-05 22:51:08,164 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 13265 transitions. Word has length 37 [2021-06-05 22:51:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:08,164 INFO L482 AbstractCegarLoop]: Abstraction has 4432 states and 13265 transitions. [2021-06-05 22:51:08,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 13265 transitions. [2021-06-05 22:51:08,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:08,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:08,171 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:08,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 22:51:08,388 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:08,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:08,388 INFO L82 PathProgramCache]: Analyzing trace with hash 179870100, now seen corresponding path program 7 times [2021-06-05 22:51:08,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:08,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371915641] [2021-06-05 22:51:08,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:08,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371915641] [2021-06-05 22:51:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371915641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:08,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667228998] [2021-06-05 22:51:08,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:08,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:09,106 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:51:09,106 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 31 treesize of output 15 [2021-06-05 22:51:09,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:09,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:09,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:09,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:51:09,313 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:09,313 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 29 treesize of output 17 [2021-06-05 22:51:09,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:09,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:09,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:09,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667228998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:09,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:09,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:51:09,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939736833] [2021-06-05 22:51:09,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:51:09,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:09,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:51:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:51:09,513 INFO L87 Difference]: Start difference. First operand 4432 states and 13265 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:12,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:12,655 INFO L93 Difference]: Finished difference Result 8013 states and 23476 transitions. [2021-06-05 22:51:12,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:51:12,655 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:12,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:12,665 INFO L225 Difference]: With dead ends: 8013 [2021-06-05 22:51:12,666 INFO L226 Difference]: Without dead ends: 7794 [2021-06-05 22:51:12,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 2725.7ms TimeCoverageRelationStatistics Valid=659, Invalid=7173, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 22:51:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7794 states. [2021-06-05 22:51:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7794 to 4516. [2021-06-05 22:51:12,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 4515 states have (on average 2.9937984496124033) internal successors, (13517), 4515 states have internal predecessors, (13517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 13517 transitions. [2021-06-05 22:51:12,743 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 13517 transitions. Word has length 37 [2021-06-05 22:51:12,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:12,743 INFO L482 AbstractCegarLoop]: Abstraction has 4516 states and 13517 transitions. [2021-06-05 22:51:12,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:12,744 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 13517 transitions. [2021-06-05 22:51:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:12,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:12,750 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:12,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 22:51:12,957 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:12,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:12,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1876176340, now seen corresponding path program 8 times [2021-06-05 22:51:12,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:12,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607562778] [2021-06-05 22:51:12,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:13,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607562778] [2021-06-05 22:51:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607562778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:13,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385402240] [2021-06-05 22:51:13,283 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:13,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:51:13,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:51:13,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:13,585 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:13,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:51:13,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:13,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:13,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:13,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:51:13,776 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:13,776 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 29 treesize of output 17 [2021-06-05 22:51:13,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:13,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:13,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:13,797 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:14,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385402240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:14,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:14,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:51:14,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364797674] [2021-06-05 22:51:14,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:14,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:14,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:14,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:14,010 INFO L87 Difference]: Start difference. First operand 4516 states and 13517 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:16,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:16,391 INFO L93 Difference]: Finished difference Result 5240 states and 15444 transitions. [2021-06-05 22:51:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:51:16,392 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:16,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:16,398 INFO L225 Difference]: With dead ends: 5240 [2021-06-05 22:51:16,398 INFO L226 Difference]: Without dead ends: 5088 [2021-06-05 22:51:16,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1772.3ms TimeCoverageRelationStatistics Valid=233, Invalid=3307, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:51:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5088 states. [2021-06-05 22:51:16,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5088 to 4471. [2021-06-05 22:51:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4471 states, 4470 states have (on average 2.9997762863534674) internal successors, (13409), 4470 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 13409 transitions. [2021-06-05 22:51:16,459 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 13409 transitions. Word has length 37 [2021-06-05 22:51:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:16,459 INFO L482 AbstractCegarLoop]: Abstraction has 4471 states and 13409 transitions. [2021-06-05 22:51:16,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 13409 transitions. [2021-06-05 22:51:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:16,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:16,465 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:16,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:16,681 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1564493906, now seen corresponding path program 9 times [2021-06-05 22:51:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:16,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350673440] [2021-06-05 22:51:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:17,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:17,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350673440] [2021-06-05 22:51:17,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350673440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:17,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697397555] [2021-06-05 22:51:17,085 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:17,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:51:17,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:17,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:17,366 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:17,367 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 31 treesize of output 19 [2021-06-05 22:51:17,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:17,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:17,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:17,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 22:51:17,582 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:17,582 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 43 treesize of output 23 [2021-06-05 22:51:17,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:17,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:17,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:17,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:51:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:17,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697397555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:17,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:17,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:51:17,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710997585] [2021-06-05 22:51:17,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:51:17,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:17,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:51:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1381, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:51:17,771 INFO L87 Difference]: Start difference. First operand 4471 states and 13409 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:21,050 INFO L93 Difference]: Finished difference Result 8212 states and 24080 transitions. [2021-06-05 22:51:21,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:51:21,051 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:21,060 INFO L225 Difference]: With dead ends: 8212 [2021-06-05 22:51:21,060 INFO L226 Difference]: Without dead ends: 7993 [2021-06-05 22:51:21,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 2829.9ms TimeCoverageRelationStatistics Valid=633, Invalid=7377, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 22:51:21,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7993 states. [2021-06-05 22:51:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7993 to 4450. [2021-06-05 22:51:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4450 states, 4449 states have (on average 2.9997752303888516) internal successors, (13346), 4449 states have internal predecessors, (13346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4450 states to 4450 states and 13346 transitions. [2021-06-05 22:51:21,136 INFO L78 Accepts]: Start accepts. Automaton has 4450 states and 13346 transitions. Word has length 37 [2021-06-05 22:51:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:21,136 INFO L482 AbstractCegarLoop]: Abstraction has 4450 states and 13346 transitions. [2021-06-05 22:51:21,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4450 states and 13346 transitions. [2021-06-05 22:51:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:21,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:21,142 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:21,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 22:51:21,357 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 131812334, now seen corresponding path program 10 times [2021-06-05 22:51:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:21,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303278077] [2021-06-05 22:51:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:21,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:21,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303278077] [2021-06-05 22:51:21,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303278077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:21,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127441396] [2021-06-05 22:51:21,696 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:21,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:51:21,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:21,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:21,949 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:51:21,949 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 29 treesize of output 13 [2021-06-05 22:51:21,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:21,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:21,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:21,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 22:51:22,156 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:22,157 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 29 treesize of output 17 [2021-06-05 22:51:22,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:22,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:22,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:22,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:22,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127441396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:22,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:22,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:51:22,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710774978] [2021-06-05 22:51:22,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:22,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:22,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:22,402 INFO L87 Difference]: Start difference. First operand 4450 states and 13346 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:24,910 INFO L93 Difference]: Finished difference Result 5299 states and 15633 transitions. [2021-06-05 22:51:24,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:51:24,910 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:24,916 INFO L225 Difference]: With dead ends: 5299 [2021-06-05 22:51:24,916 INFO L226 Difference]: Without dead ends: 5162 [2021-06-05 22:51:24,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1768.0ms TimeCoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:51:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2021-06-05 22:51:24,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 4460. [2021-06-05 22:51:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4460 states, 4459 states have (on average 2.999551468939224) internal successors, (13375), 4459 states have internal predecessors, (13375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4460 states to 4460 states and 13375 transitions. [2021-06-05 22:51:24,974 INFO L78 Accepts]: Start accepts. Automaton has 4460 states and 13375 transitions. Word has length 37 [2021-06-05 22:51:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:24,974 INFO L482 AbstractCegarLoop]: Abstraction has 4460 states and 13375 transitions. [2021-06-05 22:51:24,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4460 states and 13375 transitions. [2021-06-05 22:51:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:24,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:24,980 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:25,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:25,193 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2048900822, now seen corresponding path program 11 times [2021-06-05 22:51:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:25,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699611804] [2021-06-05 22:51:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:25,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:25,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699611804] [2021-06-05 22:51:25,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699611804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:25,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410351725] [2021-06-05 22:51:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:25,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:51:25,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:25,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:25,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:25,826 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:25,826 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 27 treesize of output 15 [2021-06-05 22:51:25,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:25,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:25,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:25,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:51:25,971 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:25,971 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 32 treesize of output 20 [2021-06-05 22:51:25,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:25,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:25,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:25,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:20 [2021-06-05 22:51:26,134 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:26,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410351725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:26,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:26,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:51:26,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98644975] [2021-06-05 22:51:26,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:51:26,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:51:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:51:26,135 INFO L87 Difference]: Start difference. First operand 4460 states and 13375 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:27,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:27,813 INFO L93 Difference]: Finished difference Result 5490 states and 16212 transitions. [2021-06-05 22:51:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 22:51:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:27,820 INFO L225 Difference]: With dead ends: 5490 [2021-06-05 22:51:27,820 INFO L226 Difference]: Without dead ends: 5339 [2021-06-05 22:51:27,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1219.2ms TimeCoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:51:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2021-06-05 22:51:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 4543. [2021-06-05 22:51:27,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4543 states, 4542 states have (on average 2.997578159401145) internal successors, (13615), 4542 states have internal predecessors, (13615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4543 states to 4543 states and 13615 transitions. [2021-06-05 22:51:27,878 INFO L78 Accepts]: Start accepts. Automaton has 4543 states and 13615 transitions. Word has length 37 [2021-06-05 22:51:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:27,878 INFO L482 AbstractCegarLoop]: Abstraction has 4543 states and 13615 transitions. [2021-06-05 22:51:27,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:27,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4543 states and 13615 transitions. [2021-06-05 22:51:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:27,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:27,884 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:28,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 22:51:28,101 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:28,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:28,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1695292094, now seen corresponding path program 12 times [2021-06-05 22:51:28,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:28,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210541738] [2021-06-05 22:51:28,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:28,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210541738] [2021-06-05 22:51:28,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210541738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:28,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936484959] [2021-06-05 22:51:28,465 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:28,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:51:28,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:51:28,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:28,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:28,721 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 25 treesize of output 13 [2021-06-05 22:51:28,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:28,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:28,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:28,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:51:28,907 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:28,907 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 29 treesize of output 17 [2021-06-05 22:51:28,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:28,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:28,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:28,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:29,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936484959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:29,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:29,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 22:51:29,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491367158] [2021-06-05 22:51:29,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:29,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:29,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:29,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:29,019 INFO L87 Difference]: Start difference. First operand 4543 states and 13615 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:32,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:32,056 INFO L93 Difference]: Finished difference Result 7604 states and 22243 transitions. [2021-06-05 22:51:32,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:51:32,056 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:32,064 INFO L225 Difference]: With dead ends: 7604 [2021-06-05 22:51:32,064 INFO L226 Difference]: Without dead ends: 7478 [2021-06-05 22:51:32,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2240.9ms TimeCoverageRelationStatistics Valid=521, Invalid=6285, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:51:32,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-05 22:51:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 4507. [2021-06-05 22:51:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 4506 states have (on average 2.9986684420772303) internal successors, (13512), 4506 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 13512 transitions. [2021-06-05 22:51:32,128 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 13512 transitions. Word has length 37 [2021-06-05 22:51:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:32,128 INFO L482 AbstractCegarLoop]: Abstraction has 4507 states and 13512 transitions. [2021-06-05 22:51:32,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 13512 transitions. [2021-06-05 22:51:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:32,133 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:32,133 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:32,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:32,349 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1533286864, now seen corresponding path program 13 times [2021-06-05 22:51:32,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:32,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532086765] [2021-06-05 22:51:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:32,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:32,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532086765] [2021-06-05 22:51:32,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532086765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:32,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824848914] [2021-06-05 22:51:32,695 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:32,977 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:51:32,978 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 29 treesize of output 13 [2021-06-05 22:51:32,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:32,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:32,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:32,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 22:51:33,175 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:33,175 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 29 treesize of output 17 [2021-06-05 22:51:33,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:33,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:33,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:33,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:33,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824848914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:33,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:33,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:51:33,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214646251] [2021-06-05 22:51:33,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:51:33,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:33,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:51:33,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:51:33,399 INFO L87 Difference]: Start difference. First operand 4507 states and 13512 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:36,026 INFO L93 Difference]: Finished difference Result 7935 states and 23388 transitions. [2021-06-05 22:51:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:51:36,026 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:36,035 INFO L225 Difference]: With dead ends: 7935 [2021-06-05 22:51:36,035 INFO L226 Difference]: Without dead ends: 7692 [2021-06-05 22:51:36,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 2212.6ms TimeCoverageRelationStatistics Valid=464, Invalid=5698, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:51:36,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7692 states. [2021-06-05 22:51:36,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7692 to 4612. [2021-06-05 22:51:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.9980481457384514) internal successors, (13824), 4611 states have internal predecessors, (13824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 13824 transitions. [2021-06-05 22:51:36,102 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 13824 transitions. Word has length 37 [2021-06-05 22:51:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:36,102 INFO L482 AbstractCegarLoop]: Abstraction has 4612 states and 13824 transitions. [2021-06-05 22:51:36,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 13824 transitions. [2021-06-05 22:51:36,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:36,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:36,107 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:36,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 22:51:36,308 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:36,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1065374192, now seen corresponding path program 14 times [2021-06-05 22:51:36,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:36,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894754017] [2021-06-05 22:51:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:36,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:36,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894754017] [2021-06-05 22:51:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894754017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:36,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361988269] [2021-06-05 22:51:36,622 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:36,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:51:36,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:36,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:51:36,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:36,879 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:36,879 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 27 treesize of output 15 [2021-06-05 22:51:36,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:36,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:36,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:36,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:51:37,074 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:37,074 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 29 treesize of output 17 [2021-06-05 22:51:37,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:37,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:37,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:37,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:37,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:37,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361988269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:37,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:37,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:51:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071518899] [2021-06-05 22:51:37,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:37,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:37,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:37,294 INFO L87 Difference]: Start difference. First operand 4612 states and 13824 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:39,886 INFO L93 Difference]: Finished difference Result 5436 states and 16069 transitions. [2021-06-05 22:51:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:51:39,887 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:39,892 INFO L225 Difference]: With dead ends: 5436 [2021-06-05 22:51:39,893 INFO L226 Difference]: Without dead ends: 5299 [2021-06-05 22:51:39,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1634.8ms TimeCoverageRelationStatistics Valid=217, Invalid=3205, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:51:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-06-05 22:51:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4635. [2021-06-05 22:51:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 4634 states have (on average 2.9974104445403538) internal successors, (13890), 4634 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:39,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 13890 transitions. [2021-06-05 22:51:39,946 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 13890 transitions. Word has length 37 [2021-06-05 22:51:39,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:39,946 INFO L482 AbstractCegarLoop]: Abstraction has 4635 states and 13890 transitions. [2021-06-05 22:51:39,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:39,946 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 13890 transitions. [2021-06-05 22:51:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:39,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:39,951 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:40,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 22:51:40,157 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:40,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:40,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1048879948, now seen corresponding path program 15 times [2021-06-05 22:51:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:40,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299421258] [2021-06-05 22:51:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:40,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:40,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299421258] [2021-06-05 22:51:40,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299421258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:40,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564736542] [2021-06-05 22:51:40,466 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:40,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:51:40,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:40,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:40,726 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:40,726 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 25 treesize of output 13 [2021-06-05 22:51:40,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:40,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:40,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:40,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:51:40,981 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:51:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 22:51:40,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:40,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:40,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:40,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 22:51:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:41,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564736542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:41,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:41,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:51:41,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652162299] [2021-06-05 22:51:41,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:41,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:41,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:41,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:41,173 INFO L87 Difference]: Start difference. First operand 4635 states and 13890 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:43,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:43,599 INFO L93 Difference]: Finished difference Result 5534 states and 16364 transitions. [2021-06-05 22:51:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:51:43,599 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:43,605 INFO L225 Difference]: With dead ends: 5534 [2021-06-05 22:51:43,606 INFO L226 Difference]: Without dead ends: 5390 [2021-06-05 22:51:43,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1712.9ms TimeCoverageRelationStatistics Valid=227, Invalid=3195, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:51:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5390 states. [2021-06-05 22:51:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5390 to 4632. [2021-06-05 22:51:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 2.997624703087886) internal successors, (13882), 4631 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 13882 transitions. [2021-06-05 22:51:43,660 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 13882 transitions. Word has length 37 [2021-06-05 22:51:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:43,660 INFO L482 AbstractCegarLoop]: Abstraction has 4632 states and 13882 transitions. [2021-06-05 22:51:43,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 13882 transitions. [2021-06-05 22:51:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:43,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:43,665 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:43,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:43,865 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash -157991202, now seen corresponding path program 16 times [2021-06-05 22:51:43,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:43,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133154595] [2021-06-05 22:51:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:43,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133154595] [2021-06-05 22:51:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133154595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699504523] [2021-06-05 22:51:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:44,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:51:44,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:44,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:44,418 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:51:44,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 22:51:44,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:44,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:44,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:44,427 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:51:44,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:44,654 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 30 treesize of output 18 [2021-06-05 22:51:44,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:44,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:44,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:44,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:51:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:44,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699504523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:44,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:44,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:51:44,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769679897] [2021-06-05 22:51:44,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:44,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:44,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:44,850 INFO L87 Difference]: Start difference. First operand 4632 states and 13882 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:47,194 INFO L93 Difference]: Finished difference Result 5614 states and 16607 transitions. [2021-06-05 22:51:47,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:51:47,195 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:47,201 INFO L225 Difference]: With dead ends: 5614 [2021-06-05 22:51:47,201 INFO L226 Difference]: Without dead ends: 5463 [2021-06-05 22:51:47,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1544.1ms TimeCoverageRelationStatistics Valid=192, Invalid=2778, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:51:47,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2021-06-05 22:51:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4636. [2021-06-05 22:51:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.9978425026968716) internal successors, (13895), 4635 states have internal predecessors, (13895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13895 transitions. [2021-06-05 22:51:47,259 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13895 transitions. Word has length 37 [2021-06-05 22:51:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:47,259 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13895 transitions. [2021-06-05 22:51:47,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13895 transitions. [2021-06-05 22:51:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:47,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:47,264 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:47,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 22:51:47,464 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash -934377174, now seen corresponding path program 17 times [2021-06-05 22:51:47,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:47,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686826255] [2021-06-05 22:51:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:47,754 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:47,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:47,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686826255] [2021-06-05 22:51:47,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686826255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:47,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971039627] [2021-06-05 22:51:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:47,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:51:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 22:51:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:48,002 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:48,002 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 27 treesize of output 15 [2021-06-05 22:51:48,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:48,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:48,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:48,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:51:48,220 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:48,221 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 36 treesize of output 20 [2021-06-05 22:51:48,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:48,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:48,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:48,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 22:51:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:48,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971039627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:48,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:48,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 22:51:48,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374723195] [2021-06-05 22:51:48,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:51:48,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:51:48,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:51:48,360 INFO L87 Difference]: Start difference. First operand 4636 states and 13895 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:49,391 INFO L93 Difference]: Finished difference Result 5069 states and 14964 transitions. [2021-06-05 22:51:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 22:51:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:49,397 INFO L225 Difference]: With dead ends: 5069 [2021-06-05 22:51:49,397 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 22:51:49,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1113.2ms TimeCoverageRelationStatistics Valid=166, Invalid=2090, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:51:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 22:51:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4642. [2021-06-05 22:51:49,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 2.9967679379444085) internal successors, (13908), 4641 states have internal predecessors, (13908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 13908 transitions. [2021-06-05 22:51:49,451 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 13908 transitions. Word has length 37 [2021-06-05 22:51:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:49,451 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 13908 transitions. [2021-06-05 22:51:49,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 13908 transitions. [2021-06-05 22:51:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:49,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:49,456 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:49,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 22:51:49,669 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325344, now seen corresponding path program 18 times [2021-06-05 22:51:49,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:49,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740450401] [2021-06-05 22:51:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:50,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:50,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740450401] [2021-06-05 22:51:50,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740450401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:50,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574947127] [2021-06-05 22:51:50,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:50,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:51:50,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:50,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:50,380 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:50,380 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 25 treesize of output 13 [2021-06-05 22:51:50,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:50,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:50,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:50,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:51:50,461 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:50,462 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 29 treesize of output 17 [2021-06-05 22:51:50,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:50,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:50,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:50,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:50,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574947127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:50,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:50,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35 [2021-06-05 22:51:50,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215238713] [2021-06-05 22:51:50,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:51:50,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:50,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:51:50,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:51:50,577 INFO L87 Difference]: Start difference. First operand 4642 states and 13908 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:53,732 INFO L93 Difference]: Finished difference Result 8061 states and 23468 transitions. [2021-06-05 22:51:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:51:53,732 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:53,741 INFO L225 Difference]: With dead ends: 8061 [2021-06-05 22:51:53,741 INFO L226 Difference]: Without dead ends: 7907 [2021-06-05 22:51:53,742 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 2296.1ms TimeCoverageRelationStatistics Valid=542, Invalid=5158, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 22:51:53,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7907 states. [2021-06-05 22:51:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7907 to 4891. [2021-06-05 22:51:53,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4891 states, 4890 states have (on average 2.9883435582822084) internal successors, (14613), 4890 states have internal predecessors, (14613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 14613 transitions. [2021-06-05 22:51:53,807 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 14613 transitions. Word has length 37 [2021-06-05 22:51:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:53,807 INFO L482 AbstractCegarLoop]: Abstraction has 4891 states and 14613 transitions. [2021-06-05 22:51:53,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 14613 transitions. [2021-06-05 22:51:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:53,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:53,812 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:54,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:54,013 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:54,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:54,013 INFO L82 PathProgramCache]: Analyzing trace with hash 587564316, now seen corresponding path program 19 times [2021-06-05 22:51:54,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:54,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347681863] [2021-06-05 22:51:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:54,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:54,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347681863] [2021-06-05 22:51:54,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347681863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:54,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782337440] [2021-06-05 22:51:54,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:51:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:54,632 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:51:54,633 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 31 treesize of output 15 [2021-06-05 22:51:54,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:54,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:54,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:54,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:51:54,826 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:54,826 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 29 treesize of output 17 [2021-06-05 22:51:54,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:54,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:54,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:54,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:55,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782337440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:55,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:55,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:51:55,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506375992] [2021-06-05 22:51:55,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:51:55,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:55,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:51:55,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:51:55,028 INFO L87 Difference]: Start difference. First operand 4891 states and 14613 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:51:58,395 INFO L93 Difference]: Finished difference Result 8551 states and 24980 transitions. [2021-06-05 22:51:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 22:51:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:51:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:51:58,405 INFO L225 Difference]: With dead ends: 8551 [2021-06-05 22:51:58,405 INFO L226 Difference]: Without dead ends: 8332 [2021-06-05 22:51:58,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2816.9ms TimeCoverageRelationStatistics Valid=706, Invalid=7484, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 22:51:58,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8332 states. [2021-06-05 22:51:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8332 to 5056. [2021-06-05 22:51:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5056 states, 5055 states have (on average 2.9887240356083087) internal successors, (15108), 5055 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 15108 transitions. [2021-06-05 22:51:58,477 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 15108 transitions. Word has length 37 [2021-06-05 22:51:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:51:58,477 INFO L482 AbstractCegarLoop]: Abstraction has 5056 states and 15108 transitions. [2021-06-05 22:51:58,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:51:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 15108 transitions. [2021-06-05 22:51:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:51:58,482 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:51:58,482 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:51:58,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 22:51:58,701 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:51:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:51:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2011096740, now seen corresponding path program 20 times [2021-06-05 22:51:58,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:51:58,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611830073] [2021-06-05 22:51:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:51:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:51:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:58,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:51:58,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611830073] [2021-06-05 22:51:58,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611830073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:58,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338158924] [2021-06-05 22:51:58,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:51:59,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:51:59,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:51:59,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:51:59,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:51:59,244 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:59,244 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 25 treesize of output 13 [2021-06-05 22:51:59,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:59,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:59,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:59,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:51:59,432 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:51:59,432 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 29 treesize of output 17 [2021-06-05 22:51:59,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:51:59,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:51:59,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:51:59,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:51:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:51:59,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338158924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:51:59,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:51:59,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:51:59,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436408227] [2021-06-05 22:51:59,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:51:59,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:51:59,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:51:59,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:51:59,667 INFO L87 Difference]: Start difference. First operand 5056 states and 15108 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:02,252 INFO L93 Difference]: Finished difference Result 5720 states and 16885 transitions. [2021-06-05 22:52:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:52:02,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:02,259 INFO L225 Difference]: With dead ends: 5720 [2021-06-05 22:52:02,259 INFO L226 Difference]: Without dead ends: 5568 [2021-06-05 22:52:02,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1677.9ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:52:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2021-06-05 22:52:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 5011. [2021-06-05 22:52:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5011 states, 5010 states have (on average 2.9940119760479043) internal successors, (15000), 5010 states have internal predecessors, (15000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5011 states to 5011 states and 15000 transitions. [2021-06-05 22:52:02,316 INFO L78 Accepts]: Start accepts. Automaton has 5011 states and 15000 transitions. Word has length 37 [2021-06-05 22:52:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:02,316 INFO L482 AbstractCegarLoop]: Abstraction has 5011 states and 15000 transitions. [2021-06-05 22:52:02,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5011 states and 15000 transitions. [2021-06-05 22:52:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:02,321 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:02,321 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:02,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:02,529 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:02,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1156799690, now seen corresponding path program 21 times [2021-06-05 22:52:02,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:02,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384054601] [2021-06-05 22:52:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:02,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:02,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384054601] [2021-06-05 22:52:02,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384054601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:02,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213980623] [2021-06-05 22:52:02,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:02,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:52:02,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:02,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:02,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:03,177 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:03,177 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 31 treesize of output 19 [2021-06-05 22:52:03,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:03,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:03,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:03,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 22:52:03,383 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:03,384 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 43 treesize of output 23 [2021-06-05 22:52:03,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:03,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:03,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:03,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:52:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:03,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213980623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:03,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:03,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:52:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607612898] [2021-06-05 22:52:03,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:52:03,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:03,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:52:03,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:52:03,585 INFO L87 Difference]: Start difference. First operand 5011 states and 15000 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:07,138 INFO L93 Difference]: Finished difference Result 8693 states and 25428 transitions. [2021-06-05 22:52:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 22:52:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:07,148 INFO L225 Difference]: With dead ends: 8693 [2021-06-05 22:52:07,148 INFO L226 Difference]: Without dead ends: 8474 [2021-06-05 22:52:07,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 2925.1ms TimeCoverageRelationStatistics Valid=674, Invalid=7698, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 22:52:07,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8474 states. [2021-06-05 22:52:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8474 to 4990. [2021-06-05 22:52:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4990 states, 4989 states have (on average 2.993986770895971) internal successors, (14937), 4989 states have internal predecessors, (14937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:07,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4990 states to 4990 states and 14937 transitions. [2021-06-05 22:52:07,253 INFO L78 Accepts]: Start accepts. Automaton has 4990 states and 14937 transitions. Word has length 37 [2021-06-05 22:52:07,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:07,253 INFO L482 AbstractCegarLoop]: Abstraction has 4990 states and 14937 transitions. [2021-06-05 22:52:07,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4990 states and 14937 transitions. [2021-06-05 22:52:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:07,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:07,258 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:07,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 22:52:07,465 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:07,465 INFO L82 PathProgramCache]: Analyzing trace with hash 539506550, now seen corresponding path program 22 times [2021-06-05 22:52:07,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:07,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174635667] [2021-06-05 22:52:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:07,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:07,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174635667] [2021-06-05 22:52:07,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174635667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:07,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067952701] [2021-06-05 22:52:07,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:07,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:52:07,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:07,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:08,032 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:52:08,032 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 31 treesize of output 15 [2021-06-05 22:52:08,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:08,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:08,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:08,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:52:08,243 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:08,243 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 29 treesize of output 17 [2021-06-05 22:52:08,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:08,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:08,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:08,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:52:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:08,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067952701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:08,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:08,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:52:08,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805460022] [2021-06-05 22:52:08,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:52:08,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:08,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:52:08,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:52:08,476 INFO L87 Difference]: Start difference. First operand 4990 states and 14937 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:11,148 INFO L93 Difference]: Finished difference Result 5779 states and 17074 transitions. [2021-06-05 22:52:11,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:52:11,148 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:11,154 INFO L225 Difference]: With dead ends: 5779 [2021-06-05 22:52:11,154 INFO L226 Difference]: Without dead ends: 5642 [2021-06-05 22:52:11,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1692.6ms TimeCoverageRelationStatistics Valid=206, Invalid=3100, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:52:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5642 states. [2021-06-05 22:52:11,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5642 to 5000. [2021-06-05 22:52:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4999 states have (on average 2.99379875975195) internal successors, (14966), 4999 states have internal predecessors, (14966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 14966 transitions. [2021-06-05 22:52:11,210 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 14966 transitions. Word has length 37 [2021-06-05 22:52:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:11,210 INFO L482 AbstractCegarLoop]: Abstraction has 5000 states and 14966 transitions. [2021-06-05 22:52:11,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:11,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 14966 transitions. [2021-06-05 22:52:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:11,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:11,215 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:11,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:11,421 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:11,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1641206606, now seen corresponding path program 23 times [2021-06-05 22:52:11,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:11,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713347890] [2021-06-05 22:52:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:11,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:11,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713347890] [2021-06-05 22:52:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713347890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:11,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795810243] [2021-06-05 22:52:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:11,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:52:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:11,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:11,981 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:11,981 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 27 treesize of output 15 [2021-06-05 22:52:11,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:11,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:11,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:11,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:52:12,122 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:12,122 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 27 treesize of output 15 [2021-06-05 22:52:12,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:12,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:12,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:12,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 22:52:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:12,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795810243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:12,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:12,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:52:12,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269430633] [2021-06-05 22:52:12,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:52:12,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:12,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:52:12,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:52:12,272 INFO L87 Difference]: Start difference. First operand 5000 states and 14966 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:14,198 INFO L93 Difference]: Finished difference Result 5952 states and 17565 transitions. [2021-06-05 22:52:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:52:14,198 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:14,206 INFO L225 Difference]: With dead ends: 5952 [2021-06-05 22:52:14,206 INFO L226 Difference]: Without dead ends: 5801 [2021-06-05 22:52:14,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1254.5ms TimeCoverageRelationStatistics Valid=183, Invalid=2469, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:52:14,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-05 22:52:14,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 5013. [2021-06-05 22:52:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.99341580207502) internal successors, (15003), 5012 states have internal predecessors, (15003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:14,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 15003 transitions. [2021-06-05 22:52:14,266 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 15003 transitions. Word has length 37 [2021-06-05 22:52:14,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:14,266 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 15003 transitions. [2021-06-05 22:52:14,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 15003 transitions. [2021-06-05 22:52:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:14,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:14,272 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:14,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 22:52:14,481 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2102986310, now seen corresponding path program 24 times [2021-06-05 22:52:14,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:14,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613848448] [2021-06-05 22:52:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:14,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:14,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613848448] [2021-06-05 22:52:14,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613848448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:14,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248356331] [2021-06-05 22:52:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:14,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:52:14,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:52:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:15,144 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:15,144 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 27 treesize of output 15 [2021-06-05 22:52:15,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:15,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:15,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:15,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:52:15,343 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:15,344 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 29 treesize of output 17 [2021-06-05 22:52:15,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:15,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:15,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:15,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:52:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:15,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248356331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:15,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:15,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 22:52:15,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756375517] [2021-06-05 22:52:15,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:52:15,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:15,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:52:15,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:52:15,467 INFO L87 Difference]: Start difference. First operand 5013 states and 15003 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:18,401 INFO L93 Difference]: Finished difference Result 7849 states and 22977 transitions. [2021-06-05 22:52:18,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:52:18,402 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:18,412 INFO L225 Difference]: With dead ends: 7849 [2021-06-05 22:52:18,412 INFO L226 Difference]: Without dead ends: 7723 [2021-06-05 22:52:18,413 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 2417.0ms TimeCoverageRelationStatistics Valid=524, Invalid=6282, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:52:18,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-06-05 22:52:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 4949. [2021-06-05 22:52:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.994341147938561) internal successors, (14816), 4948 states have internal predecessors, (14816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14816 transitions. [2021-06-05 22:52:18,497 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14816 transitions. Word has length 37 [2021-06-05 22:52:18,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:18,497 INFO L482 AbstractCegarLoop]: Abstraction has 4949 states and 14816 transitions. [2021-06-05 22:52:18,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14816 transitions. [2021-06-05 22:52:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:18,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:18,503 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:18,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:18,719 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1940981080, now seen corresponding path program 25 times [2021-06-05 22:52:18,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:18,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6096460] [2021-06-05 22:52:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:19,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:19,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6096460] [2021-06-05 22:52:19,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6096460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:19,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433557109] [2021-06-05 22:52:19,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:19,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:19,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:19,320 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:52:19,321 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 31 treesize of output 15 [2021-06-05 22:52:19,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:19,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:19,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:19,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:52:19,523 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:19,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:52:19,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:19,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:19,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:19,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:52:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:19,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433557109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:19,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:19,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:52:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674163053] [2021-06-05 22:52:19,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:52:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:52:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:52:19,727 INFO L87 Difference]: Start difference. First operand 4949 states and 14816 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:22,480 INFO L93 Difference]: Finished difference Result 8528 states and 25143 transitions. [2021-06-05 22:52:22,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:52:22,480 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:22,490 INFO L225 Difference]: With dead ends: 8528 [2021-06-05 22:52:22,490 INFO L226 Difference]: Without dead ends: 8285 [2021-06-05 22:52:22,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 2340.4ms TimeCoverageRelationStatistics Valid=476, Invalid=5844, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:52:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8285 states. [2021-06-05 22:52:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8285 to 4893. [2021-06-05 22:52:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 2.994276369582993) internal successors, (14648), 4892 states have internal predecessors, (14648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:22,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 14648 transitions. [2021-06-05 22:52:22,561 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 14648 transitions. Word has length 37 [2021-06-05 22:52:22,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:22,562 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 14648 transitions. [2021-06-05 22:52:22,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 14648 transitions. [2021-06-05 22:52:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:22,567 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:22,567 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:22,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 22:52:22,767 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:22,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:22,768 INFO L82 PathProgramCache]: Analyzing trace with hash -657679976, now seen corresponding path program 26 times [2021-06-05 22:52:22,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:22,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599159838] [2021-06-05 22:52:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:23,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599159838] [2021-06-05 22:52:23,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599159838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:23,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788068486] [2021-06-05 22:52:23,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:23,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:52:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:52:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:23,292 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:23,292 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 25 treesize of output 13 [2021-06-05 22:52:23,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:23,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:23,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:23,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:52:23,499 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:23,500 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 29 treesize of output 17 [2021-06-05 22:52:23,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:23,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:23,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:23,508 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:52:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:23,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788068486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:23,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:23,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:52:23,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373455275] [2021-06-05 22:52:23,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:52:23,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:23,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:52:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:52:23,740 INFO L87 Difference]: Start difference. First operand 4893 states and 14648 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:26,287 INFO L93 Difference]: Finished difference Result 5657 states and 16743 transitions. [2021-06-05 22:52:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:52:26,288 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:26,294 INFO L225 Difference]: With dead ends: 5657 [2021-06-05 22:52:26,294 INFO L226 Difference]: Without dead ends: 5520 [2021-06-05 22:52:26,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1624.8ms TimeCoverageRelationStatistics Valid=203, Invalid=2989, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:52:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2021-06-05 22:52:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 4916. [2021-06-05 22:52:26,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4916 states, 4915 states have (on average 2.9936927772126145) internal successors, (14714), 4915 states have internal predecessors, (14714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4916 states to 4916 states and 14714 transitions. [2021-06-05 22:52:26,353 INFO L78 Accepts]: Start accepts. Automaton has 4916 states and 14714 transitions. Word has length 37 [2021-06-05 22:52:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:26,353 INFO L482 AbstractCegarLoop]: Abstraction has 4916 states and 14714 transitions. [2021-06-05 22:52:26,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4916 states and 14714 transitions. [2021-06-05 22:52:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:26,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:26,358 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:26,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:26,560 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:26,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1456574164, now seen corresponding path program 27 times [2021-06-05 22:52:26,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:26,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004629655] [2021-06-05 22:52:26,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:26,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004629655] [2021-06-05 22:52:26,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004629655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:26,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734360740] [2021-06-05 22:52:26,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:26,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:52:26,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:26,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:27,215 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:27,216 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 25 treesize of output 13 [2021-06-05 22:52:27,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:27,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:27,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:27,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:52:27,469 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:52:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 22:52:27,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:27,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:27,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:27,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 22:52:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:27,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734360740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:27,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:27,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:52:27,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65692469] [2021-06-05 22:52:27,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:52:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:52:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:52:27,654 INFO L87 Difference]: Start difference. First operand 4916 states and 14714 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:30,304 INFO L93 Difference]: Finished difference Result 5782 states and 17101 transitions. [2021-06-05 22:52:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:52:30,305 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:30,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:30,311 INFO L225 Difference]: With dead ends: 5782 [2021-06-05 22:52:30,311 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 22:52:30,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1807.4ms TimeCoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:52:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 22:52:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4906. [2021-06-05 22:52:30,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 4905 states have (on average 2.99388379204893) internal successors, (14685), 4905 states have internal predecessors, (14685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 14685 transitions. [2021-06-05 22:52:30,365 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 14685 transitions. Word has length 37 [2021-06-05 22:52:30,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:30,365 INFO L482 AbstractCegarLoop]: Abstraction has 4906 states and 14685 transitions. [2021-06-05 22:52:30,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 14685 transitions. [2021-06-05 22:52:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:30,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:30,369 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:30,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:30,570 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:30,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:30,570 INFO L82 PathProgramCache]: Analyzing trace with hash 249703014, now seen corresponding path program 28 times [2021-06-05 22:52:30,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:30,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970107941] [2021-06-05 22:52:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:30,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:30,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970107941] [2021-06-05 22:52:30,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970107941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:30,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134755855] [2021-06-05 22:52:30,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:30,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:52:30,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:30,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:52:30,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:31,118 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:52:31,118 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 31 treesize of output 15 [2021-06-05 22:52:31,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:31,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:31,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:31,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:52:31,263 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:31,263 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 21 [2021-06-05 22:52:31,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:31,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:31,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:31,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:18 [2021-06-05 22:52:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:31,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134755855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:31,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:31,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:52:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396612920] [2021-06-05 22:52:31,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:52:31,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:31,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:52:31,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:52:31,422 INFO L87 Difference]: Start difference. First operand 4906 states and 14685 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:33,215 INFO L93 Difference]: Finished difference Result 5906 states and 17467 transitions. [2021-06-05 22:52:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:52:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:33,222 INFO L225 Difference]: With dead ends: 5906 [2021-06-05 22:52:33,222 INFO L226 Difference]: Without dead ends: 5748 [2021-06-05 22:52:33,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1167.4ms TimeCoverageRelationStatistics Valid=160, Invalid=2096, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 22:52:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5748 states. [2021-06-05 22:52:33,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5748 to 4888. [2021-06-05 22:52:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.9950890116635973) internal successors, (14637), 4887 states have internal predecessors, (14637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 14637 transitions. [2021-06-05 22:52:33,281 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 14637 transitions. Word has length 37 [2021-06-05 22:52:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:33,281 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 14637 transitions. [2021-06-05 22:52:33,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 14637 transitions. [2021-06-05 22:52:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:33,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:33,285 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:33,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 22:52:33,486 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1967025990, now seen corresponding path program 29 times [2021-06-05 22:52:33,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:33,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042224339] [2021-06-05 22:52:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:33,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:33,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042224339] [2021-06-05 22:52:33,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042224339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:33,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129567510] [2021-06-05 22:52:33,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:33,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:52:33,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:52:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:34,096 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:34,096 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 27 treesize of output 15 [2021-06-05 22:52:34,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:34,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:34,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:34,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:52:34,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:52:34,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:52:34,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:52:34,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:52:34,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:52:34,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:34,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:34,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:34,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:20 [2021-06-05 22:52:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:34,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129567510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:34,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:34,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:52:34,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070683279] [2021-06-05 22:52:34,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:52:34,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:52:34,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:52:34,572 INFO L87 Difference]: Start difference. First operand 4888 states and 14637 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:38,222 INFO L93 Difference]: Finished difference Result 8302 states and 24248 transitions. [2021-06-05 22:52:38,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 22:52:38,222 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:38,232 INFO L225 Difference]: With dead ends: 8302 [2021-06-05 22:52:38,232 INFO L226 Difference]: Without dead ends: 8083 [2021-06-05 22:52:38,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 3148.3ms TimeCoverageRelationStatistics Valid=753, Invalid=7989, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 22:52:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8083 states. [2021-06-05 22:52:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8083 to 5052. [2021-06-05 22:52:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5052 states, 5051 states have (on average 2.9952484656503664) internal successors, (15129), 5051 states have internal predecessors, (15129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5052 states to 5052 states and 15129 transitions. [2021-06-05 22:52:38,301 INFO L78 Accepts]: Start accepts. Automaton has 5052 states and 15129 transitions. Word has length 37 [2021-06-05 22:52:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:38,301 INFO L482 AbstractCegarLoop]: Abstraction has 5052 states and 15129 transitions. [2021-06-05 22:52:38,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 5052 states and 15129 transitions. [2021-06-05 22:52:38,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:38,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:38,306 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:38,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:38,506 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash -270719750, now seen corresponding path program 30 times [2021-06-05 22:52:38,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:38,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89906392] [2021-06-05 22:52:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:38,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89906392] [2021-06-05 22:52:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89906392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472811077] [2021-06-05 22:52:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:38,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:52:38,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:38,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:38,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:39,000 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:39,000 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 27 treesize of output 15 [2021-06-05 22:52:39,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:39,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:39,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:39,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:52:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:52:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:52:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:52:39,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 22:52:39,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:39,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:39,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:39,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-06-05 22:52:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:39,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472811077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:39,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:39,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:52:39,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272919765] [2021-06-05 22:52:39,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:52:39,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:52:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:52:39,383 INFO L87 Difference]: Start difference. First operand 5052 states and 15129 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:40,853 INFO L93 Difference]: Finished difference Result 5549 states and 16371 transitions. [2021-06-05 22:52:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:52:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:40,860 INFO L225 Difference]: With dead ends: 5549 [2021-06-05 22:52:40,860 INFO L226 Difference]: Without dead ends: 5492 [2021-06-05 22:52:40,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1424.0ms TimeCoverageRelationStatistics Valid=227, Invalid=2743, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 22:52:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2021-06-05 22:52:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 5096. [2021-06-05 22:52:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5096 states, 5095 states have (on average 2.991756624141315) internal successors, (15243), 5095 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5096 states to 5096 states and 15243 transitions. [2021-06-05 22:52:40,932 INFO L78 Accepts]: Start accepts. Automaton has 5096 states and 15243 transitions. Word has length 37 [2021-06-05 22:52:40,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:40,932 INFO L482 AbstractCegarLoop]: Abstraction has 5096 states and 15243 transitions. [2021-06-05 22:52:40,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:40,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5096 states and 15243 transitions. [2021-06-05 22:52:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:40,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:40,937 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:41,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 22:52:41,137 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash 583577300, now seen corresponding path program 31 times [2021-06-05 22:52:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:41,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212454267] [2021-06-05 22:52:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:41,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:41,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212454267] [2021-06-05 22:52:41,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212454267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:41,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723280064] [2021-06-05 22:52:41,461 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:41,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:41,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:41,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:41,680 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:52:41,680 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 29 treesize of output 13 [2021-06-05 22:52:41,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:41,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:41,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:41,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:24 [2021-06-05 22:52:41,907 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:41,908 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 29 treesize of output 17 [2021-06-05 22:52:41,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:41,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:41,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:41,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:52:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:42,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723280064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:42,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:42,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:52:42,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396104830] [2021-06-05 22:52:42,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:52:42,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:42,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:52:42,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:52:42,103 INFO L87 Difference]: Start difference. First operand 5096 states and 15243 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:45,041 INFO L93 Difference]: Finished difference Result 7807 states and 22813 transitions. [2021-06-05 22:52:45,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:52:45,041 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:45,050 INFO L225 Difference]: With dead ends: 7807 [2021-06-05 22:52:45,050 INFO L226 Difference]: Without dead ends: 7588 [2021-06-05 22:52:45,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2480.4ms TimeCoverageRelationStatistics Valid=561, Invalid=6081, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:52:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7588 states. [2021-06-05 22:52:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7588 to 5071. [2021-06-05 22:52:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5071 states, 5070 states have (on average 2.991518737672584) internal successors, (15167), 5070 states have internal predecessors, (15167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5071 states to 5071 states and 15167 transitions. [2021-06-05 22:52:45,119 INFO L78 Accepts]: Start accepts. Automaton has 5071 states and 15167 transitions. Word has length 37 [2021-06-05 22:52:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:45,119 INFO L482 AbstractCegarLoop]: Abstraction has 5071 states and 15167 transitions. [2021-06-05 22:52:45,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5071 states and 15167 transitions. [2021-06-05 22:52:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:45,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:45,124 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:45,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:45,325 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash -451603996, now seen corresponding path program 32 times [2021-06-05 22:52:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:45,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915549414] [2021-06-05 22:52:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:45,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:45,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915549414] [2021-06-05 22:52:45,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915549414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:45,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692682024] [2021-06-05 22:52:45,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:45,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:52:45,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:52:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:45,859 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:45,860 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 25 treesize of output 13 [2021-06-05 22:52:45,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:45,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:45,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:45,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 22:52:46,078 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:46,078 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 29 treesize of output 17 [2021-06-05 22:52:46,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:46,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:46,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:46,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:52:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692682024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:52:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214631699] [2021-06-05 22:52:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:52:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:46,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:52:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:52:46,272 INFO L87 Difference]: Start difference. First operand 5071 states and 15167 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:49,124 INFO L93 Difference]: Finished difference Result 7932 states and 23187 transitions. [2021-06-05 22:52:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:52:49,130 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:49,139 INFO L225 Difference]: With dead ends: 7932 [2021-06-05 22:52:49,139 INFO L226 Difference]: Without dead ends: 7713 [2021-06-05 22:52:49,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2310.4ms TimeCoverageRelationStatistics Valid=504, Invalid=5976, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:52:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7713 states. [2021-06-05 22:52:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7713 to 5034. [2021-06-05 22:52:49,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5034 states, 5033 states have (on average 2.9920524538048876) internal successors, (15059), 5033 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:49,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5034 states to 5034 states and 15059 transitions. [2021-06-05 22:52:49,206 INFO L78 Accepts]: Start accepts. Automaton has 5034 states and 15059 transitions. Word has length 37 [2021-06-05 22:52:49,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:49,206 INFO L482 AbstractCegarLoop]: Abstraction has 5034 states and 15059 transitions. [2021-06-05 22:52:49,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 5034 states and 15059 transitions. [2021-06-05 22:52:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:49,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:49,211 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:49,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 22:52:49,411 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:49,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:49,411 INFO L82 PathProgramCache]: Analyzing trace with hash -613609226, now seen corresponding path program 33 times [2021-06-05 22:52:49,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:49,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506333473] [2021-06-05 22:52:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:49,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506333473] [2021-06-05 22:52:49,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506333473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:49,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381570892] [2021-06-05 22:52:49,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:49,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:52:49,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:52:49,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:49,950 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:49,951 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 27 treesize of output 15 [2021-06-05 22:52:49,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:49,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:49,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:49,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:52:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:52:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:52:50,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:52:50,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 22:52:50,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:50,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:50,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:50,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:20 [2021-06-05 22:52:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:50,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381570892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:50,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:50,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 36 [2021-06-05 22:52:50,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818617760] [2021-06-05 22:52:50,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:52:50,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:50,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:52:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:52:50,410 INFO L87 Difference]: Start difference. First operand 5034 states and 15059 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:53,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:53,805 INFO L93 Difference]: Finished difference Result 8035 states and 23567 transitions. [2021-06-05 22:52:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:52:53,806 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:53,815 INFO L225 Difference]: With dead ends: 8035 [2021-06-05 22:52:53,815 INFO L226 Difference]: Without dead ends: 7789 [2021-06-05 22:52:53,816 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 2489.3ms TimeCoverageRelationStatistics Valid=511, Invalid=6131, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:52:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2021-06-05 22:52:53,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 5029. [2021-06-05 22:52:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5029 states, 5028 states have (on average 2.991447891805887) internal successors, (15041), 5028 states have internal predecessors, (15041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:53,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5029 states to 5029 states and 15041 transitions. [2021-06-05 22:52:53,893 INFO L78 Accepts]: Start accepts. Automaton has 5029 states and 15041 transitions. Word has length 37 [2021-06-05 22:52:53,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:53,893 INFO L482 AbstractCegarLoop]: Abstraction has 5029 states and 15041 transitions. [2021-06-05 22:52:53,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5029 states and 15041 transitions. [2021-06-05 22:52:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:53,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:53,898 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:54,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 22:52:54,102 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1746600864, now seen corresponding path program 34 times [2021-06-05 22:52:54,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:54,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072591005] [2021-06-05 22:52:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:54,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:54,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072591005] [2021-06-05 22:52:54,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072591005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:54,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907769143] [2021-06-05 22:52:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:54,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:52:54,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:54,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:52:54,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:54,637 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:54,637 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 27 treesize of output 15 [2021-06-05 22:52:54,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:54,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:54,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:54,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:52:54,864 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:54,864 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 29 treesize of output 17 [2021-06-05 22:52:54,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:54,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:54,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:54,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:52:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:55,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907769143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:55,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:55,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:52:55,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621022938] [2021-06-05 22:52:55,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:52:55,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:55,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:52:55,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:52:55,064 INFO L87 Difference]: Start difference. First operand 5029 states and 15041 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:52:57,920 INFO L93 Difference]: Finished difference Result 8787 states and 26208 transitions. [2021-06-05 22:52:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:52:57,920 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:52:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:52:57,930 INFO L225 Difference]: With dead ends: 8787 [2021-06-05 22:52:57,930 INFO L226 Difference]: Without dead ends: 8664 [2021-06-05 22:52:57,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2215.1ms TimeCoverageRelationStatistics Valid=478, Invalid=5842, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:52:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8664 states. [2021-06-05 22:52:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8664 to 5522. [2021-06-05 22:52:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5522 states, 5521 states have (on average 3.009599710197428) internal successors, (16616), 5521 states have internal predecessors, (16616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 16616 transitions. [2021-06-05 22:52:58,006 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 16616 transitions. Word has length 37 [2021-06-05 22:52:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:52:58,006 INFO L482 AbstractCegarLoop]: Abstraction has 5522 states and 16616 transitions. [2021-06-05 22:52:58,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:52:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 16616 transitions. [2021-06-05 22:52:58,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:52:58,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:52:58,012 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:52:58,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:58,212 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:52:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:52:58,212 INFO L82 PathProgramCache]: Analyzing trace with hash -50294624, now seen corresponding path program 35 times [2021-06-05 22:52:58,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:52:58,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649911650] [2021-06-05 22:52:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:52:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:52:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:58,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:52:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649911650] [2021-06-05 22:52:58,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649911650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:58,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744988231] [2021-06-05 22:52:58,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:52:58,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:52:58,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:52:58,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:52:58,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:52:58,699 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:58,699 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 27 treesize of output 15 [2021-06-05 22:52:58,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:58,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:58,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:58,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:52:58,928 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:52:58,928 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 38 treesize of output 22 [2021-06-05 22:52:58,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:52:58,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:52:58,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:52:58,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:52:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:52:59,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744988231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:52:59,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:52:59,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 22:52:59,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603601918] [2021-06-05 22:52:59,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:52:59,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:52:59,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:52:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:52:59,093 INFO L87 Difference]: Start difference. First operand 5522 states and 16616 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:00,078 INFO L93 Difference]: Finished difference Result 5957 states and 17721 transitions. [2021-06-05 22:53:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 22:53:00,079 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:00,086 INFO L225 Difference]: With dead ends: 5957 [2021-06-05 22:53:00,086 INFO L226 Difference]: Without dead ends: 5921 [2021-06-05 22:53:00,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1137.6ms TimeCoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 22:53:00,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-06-05 22:53:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 5638. [2021-06-05 22:53:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5638 states, 5637 states have (on average 3.0014191946070605) internal successors, (16919), 5637 states have internal predecessors, (16919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5638 states to 5638 states and 16919 transitions. [2021-06-05 22:53:00,148 INFO L78 Accepts]: Start accepts. Automaton has 5638 states and 16919 transitions. Word has length 37 [2021-06-05 22:53:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:00,148 INFO L482 AbstractCegarLoop]: Abstraction has 5638 states and 16919 transitions. [2021-06-05 22:53:00,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5638 states and 16919 transitions. [2021-06-05 22:53:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:00,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:00,153 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:00,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:00,355 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:00,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:00,355 INFO L82 PathProgramCache]: Analyzing trace with hash -114922920, now seen corresponding path program 36 times [2021-06-05 22:53:00,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:00,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707825618] [2021-06-05 22:53:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:00,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:00,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707825618] [2021-06-05 22:53:00,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707825618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:00,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797799687] [2021-06-05 22:53:00,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:00,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:53:00,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:00,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:53:01,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:53:01,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 22:53:01,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:01,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:01,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:01,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:37 [2021-06-05 22:53:01,221 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:01,221 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 38 treesize of output 22 [2021-06-05 22:53:01,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:01,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:01,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:01,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:53:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:01,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797799687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:01,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:01,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 22:53:01,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116857063] [2021-06-05 22:53:01,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:53:01,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:53:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:53:01,409 INFO L87 Difference]: Start difference. First operand 5638 states and 16919 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:03,905 INFO L93 Difference]: Finished difference Result 6973 states and 20672 transitions. [2021-06-05 22:53:03,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:53:03,906 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:03,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:03,914 INFO L225 Difference]: With dead ends: 6973 [2021-06-05 22:53:03,914 INFO L226 Difference]: Without dead ends: 6709 [2021-06-05 22:53:03,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1953.6ms TimeCoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:53:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2021-06-05 22:53:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 5709. [2021-06-05 22:53:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5709 states, 5708 states have (on average 2.994043447792572) internal successors, (17090), 5708 states have internal predecessors, (17090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5709 states to 5709 states and 17090 transitions. [2021-06-05 22:53:03,981 INFO L78 Accepts]: Start accepts. Automaton has 5709 states and 17090 transitions. Word has length 37 [2021-06-05 22:53:03,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:03,981 INFO L482 AbstractCegarLoop]: Abstraction has 5709 states and 17090 transitions. [2021-06-05 22:53:03,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:03,981 INFO L276 IsEmpty]: Start isEmpty. Operand 5709 states and 17090 transitions. [2021-06-05 22:53:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:03,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:03,987 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:04,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:04,187 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1399226358, now seen corresponding path program 37 times [2021-06-05 22:53:04,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:04,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528081411] [2021-06-05 22:53:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:04,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528081411] [2021-06-05 22:53:04,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528081411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:04,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041051159] [2021-06-05 22:53:04,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:53:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:04,811 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:04,811 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 25 treesize of output 13 [2021-06-05 22:53:04,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:04,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:04,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:04,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:53:04,911 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:04,912 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 29 treesize of output 17 [2021-06-05 22:53:04,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:04,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:04,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:04,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:53:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:05,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041051159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:05,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:05,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2021-06-05 22:53:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276087103] [2021-06-05 22:53:05,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:53:05,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:05,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:53:05,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1110, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:53:05,108 INFO L87 Difference]: Start difference. First operand 5709 states and 17090 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:07,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:07,363 INFO L93 Difference]: Finished difference Result 7129 states and 21094 transitions. [2021-06-05 22:53:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:53:07,363 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:07,372 INFO L225 Difference]: With dead ends: 7129 [2021-06-05 22:53:07,372 INFO L226 Difference]: Without dead ends: 6874 [2021-06-05 22:53:07,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1663.1ms TimeCoverageRelationStatistics Valid=231, Invalid=3075, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:53:07,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6874 states. [2021-06-05 22:53:07,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6874 to 5817. [2021-06-05 22:53:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5817 states, 5816 states have (on average 2.9936382393397523) internal successors, (17411), 5816 states have internal predecessors, (17411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5817 states to 5817 states and 17411 transitions. [2021-06-05 22:53:07,445 INFO L78 Accepts]: Start accepts. Automaton has 5817 states and 17411 transitions. Word has length 37 [2021-06-05 22:53:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:07,445 INFO L482 AbstractCegarLoop]: Abstraction has 5817 states and 17411 transitions. [2021-06-05 22:53:07,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 5817 states and 17411 transitions. [2021-06-05 22:53:07,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:07,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:07,451 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:07,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 22:53:07,652 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:07,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:07,652 INFO L82 PathProgramCache]: Analyzing trace with hash 970465330, now seen corresponding path program 38 times [2021-06-05 22:53:07,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:07,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665783312] [2021-06-05 22:53:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:07,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:07,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665783312] [2021-06-05 22:53:07,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665783312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:07,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275430761] [2021-06-05 22:53:07,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:08,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:53:08,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:08,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:53:08,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:08,215 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:08,215 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 27 treesize of output 15 [2021-06-05 22:53:08,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:08,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:08,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:08,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:53:08,400 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:08,400 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 29 treesize of output 17 [2021-06-05 22:53:08,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:08,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:08,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:08,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:53:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:08,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275430761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:08,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:08,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:08,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529409147] [2021-06-05 22:53:08,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:08,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:08,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:08,628 INFO L87 Difference]: Start difference. First operand 5817 states and 17411 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:10,886 INFO L93 Difference]: Finished difference Result 7091 states and 21040 transitions. [2021-06-05 22:53:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:53:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:10,895 INFO L225 Difference]: With dead ends: 7091 [2021-06-05 22:53:10,895 INFO L226 Difference]: Without dead ends: 6901 [2021-06-05 22:53:10,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1712.2ms TimeCoverageRelationStatistics Valid=239, Invalid=3421, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:53:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-05 22:53:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5880. [2021-06-05 22:53:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5880 states, 5879 states have (on average 2.99319612178942) internal successors, (17597), 5879 states have internal predecessors, (17597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:10,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5880 states to 5880 states and 17597 transitions. [2021-06-05 22:53:10,970 INFO L78 Accepts]: Start accepts. Automaton has 5880 states and 17597 transitions. Word has length 37 [2021-06-05 22:53:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:10,970 INFO L482 AbstractCegarLoop]: Abstraction has 5880 states and 17597 transitions. [2021-06-05 22:53:10,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 5880 states and 17597 transitions. [2021-06-05 22:53:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:10,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:10,976 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:11,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:11,176 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash -773898676, now seen corresponding path program 39 times [2021-06-05 22:53:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:11,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617933609] [2021-06-05 22:53:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:11,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:11,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:11,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617933609] [2021-06-05 22:53:11,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617933609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:11,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136430866] [2021-06-05 22:53:11,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:11,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:53:11,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:11,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:11,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:11,780 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:11,780 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 27 treesize of output 15 [2021-06-05 22:53:11,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:11,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:11,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:11,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:53:11,979 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:11,979 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 38 treesize of output 22 [2021-06-05 22:53:11,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:11,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:11,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:11,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:53:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:12,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136430866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:12,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:12,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:12,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567676936] [2021-06-05 22:53:12,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:12,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:12,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:12,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:12,206 INFO L87 Difference]: Start difference. First operand 5880 states and 17597 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:14,673 INFO L93 Difference]: Finished difference Result 7286 states and 21638 transitions. [2021-06-05 22:53:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:53:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:14,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:14,682 INFO L225 Difference]: With dead ends: 7286 [2021-06-05 22:53:14,682 INFO L226 Difference]: Without dead ends: 7099 [2021-06-05 22:53:14,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 1759.9ms TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:53:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7099 states. [2021-06-05 22:53:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7099 to 5901. [2021-06-05 22:53:14,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5901 states, 5900 states have (on average 2.99271186440678) internal successors, (17657), 5900 states have internal predecessors, (17657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5901 states to 5901 states and 17657 transitions. [2021-06-05 22:53:14,753 INFO L78 Accepts]: Start accepts. Automaton has 5901 states and 17657 transitions. Word has length 37 [2021-06-05 22:53:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:14,753 INFO L482 AbstractCegarLoop]: Abstraction has 5901 states and 17657 transitions. [2021-06-05 22:53:14,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5901 states and 17657 transitions. [2021-06-05 22:53:14,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:14,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:14,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:14,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:14,959 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1340355464, now seen corresponding path program 40 times [2021-06-05 22:53:14,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:14,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045837567] [2021-06-05 22:53:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:15,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:15,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045837567] [2021-06-05 22:53:15,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045837567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:15,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254403846] [2021-06-05 22:53:15,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:15,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:53:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:15,522 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:53:15,522 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 29 treesize of output 13 [2021-06-05 22:53:15,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:15,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:15,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:15,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 22:53:15,757 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:15,757 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 30 treesize of output 18 [2021-06-05 22:53:15,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:15,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:15,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:15,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:53:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:15,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254403846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:15,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:15,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:15,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108375710] [2021-06-05 22:53:15,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:15,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:15,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:15,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:15,923 INFO L87 Difference]: Start difference. First operand 5901 states and 17657 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:18,261 INFO L93 Difference]: Finished difference Result 7167 states and 21271 transitions. [2021-06-05 22:53:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:53:18,261 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:18,270 INFO L225 Difference]: With dead ends: 7167 [2021-06-05 22:53:18,270 INFO L226 Difference]: Without dead ends: 6967 [2021-06-05 22:53:18,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1764.3ms TimeCoverageRelationStatistics Valid=239, Invalid=3543, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:53:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2021-06-05 22:53:18,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 5895. [2021-06-05 22:53:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5895 states, 5894 states have (on average 2.993552765524262) internal successors, (17644), 5894 states have internal predecessors, (17644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5895 states to 5895 states and 17644 transitions. [2021-06-05 22:53:18,370 INFO L78 Accepts]: Start accepts. Automaton has 5895 states and 17644 transitions. Word has length 37 [2021-06-05 22:53:18,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:18,370 INFO L482 AbstractCegarLoop]: Abstraction has 5895 states and 17644 transitions. [2021-06-05 22:53:18,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5895 states and 17644 transitions. [2021-06-05 22:53:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:18,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:18,376 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:18,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 22:53:18,576 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1809079972, now seen corresponding path program 41 times [2021-06-05 22:53:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:18,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710377386] [2021-06-05 22:53:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:18,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710377386] [2021-06-05 22:53:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710377386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699279711] [2021-06-05 22:53:18,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:18,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:53:18,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:18,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:53:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:19,118 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:19,118 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 27 treesize of output 15 [2021-06-05 22:53:19,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:19,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:19,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:19,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:53:19,229 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:19,230 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 31 treesize of output 19 [2021-06-05 22:53:19,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:19,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:19,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:19,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:53:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:19,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699279711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:19,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:19,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:53:19,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349509624] [2021-06-05 22:53:19,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:53:19,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:53:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:53:19,392 INFO L87 Difference]: Start difference. First operand 5895 states and 17644 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:21,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:21,039 INFO L93 Difference]: Finished difference Result 7693 states and 22811 transitions. [2021-06-05 22:53:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:53:21,040 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:21,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:21,049 INFO L225 Difference]: With dead ends: 7693 [2021-06-05 22:53:21,049 INFO L226 Difference]: Without dead ends: 7471 [2021-06-05 22:53:21,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1255.1ms TimeCoverageRelationStatistics Valid=208, Invalid=2654, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:53:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7471 states. [2021-06-05 22:53:21,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7471 to 5928. [2021-06-05 22:53:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5928 states, 5927 states have (on average 2.9940948203138182) internal successors, (17746), 5927 states have internal predecessors, (17746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5928 states to 5928 states and 17746 transitions. [2021-06-05 22:53:21,119 INFO L78 Accepts]: Start accepts. Automaton has 5928 states and 17746 transitions. Word has length 37 [2021-06-05 22:53:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:21,119 INFO L482 AbstractCegarLoop]: Abstraction has 5928 states and 17746 transitions. [2021-06-05 22:53:21,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states and 17746 transitions. [2021-06-05 22:53:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:21,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:21,125 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:21,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:21,325 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:21,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:21,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1971085202, now seen corresponding path program 42 times [2021-06-05 22:53:21,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:21,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669076009] [2021-06-05 22:53:21,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:21,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:21,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669076009] [2021-06-05 22:53:21,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669076009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:21,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671729026] [2021-06-05 22:53:21,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:21,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:53:21,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:21,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:21,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:21,867 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:21,867 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 27 treesize of output 15 [2021-06-05 22:53:21,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:21,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:21,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:21,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:53:22,061 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:22,061 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 36 treesize of output 20 [2021-06-05 22:53:22,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:22,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:22,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:22,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 22:53:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:22,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671729026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:22,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:22,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:22,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455720031] [2021-06-05 22:53:22,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:22,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:22,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:22,252 INFO L87 Difference]: Start difference. First operand 5928 states and 17746 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:24,647 INFO L93 Difference]: Finished difference Result 7495 states and 22284 transitions. [2021-06-05 22:53:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:53:24,648 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:24,658 INFO L225 Difference]: With dead ends: 7495 [2021-06-05 22:53:24,658 INFO L226 Difference]: Without dead ends: 7233 [2021-06-05 22:53:24,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1760.2ms TimeCoverageRelationStatistics Valid=248, Invalid=3534, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:53:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7233 states. [2021-06-05 22:53:24,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7233 to 5931. [2021-06-05 22:53:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5931 states, 5930 states have (on average 2.997133220910624) internal successors, (17773), 5930 states have internal predecessors, (17773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5931 states to 5931 states and 17773 transitions. [2021-06-05 22:53:24,736 INFO L78 Accepts]: Start accepts. Automaton has 5931 states and 17773 transitions. Word has length 37 [2021-06-05 22:53:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:24,736 INFO L482 AbstractCegarLoop]: Abstraction has 5931 states and 17773 transitions. [2021-06-05 22:53:24,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 5931 states and 17773 transitions. [2021-06-05 22:53:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:24,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:24,742 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:24,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 22:53:24,945 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1806920574, now seen corresponding path program 43 times [2021-06-05 22:53:24,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:24,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824488238] [2021-06-05 22:53:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:25,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:25,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824488238] [2021-06-05 22:53:25,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824488238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:25,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039686005] [2021-06-05 22:53:25,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:25,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:25,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:25,599 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:25,599 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 31 treesize of output 19 [2021-06-05 22:53:25,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:25,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:25,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:25,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 22:53:25,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:25,671 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 29 treesize of output 17 [2021-06-05 22:53:25,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:25,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:25,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:25,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:53:25,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:25,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039686005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:25,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:25,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-06-05 22:53:25,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300024517] [2021-06-05 22:53:25,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 22:53:25,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:25,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 22:53:25,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:53:25,835 INFO L87 Difference]: Start difference. First operand 5931 states and 17773 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:27,625 INFO L93 Difference]: Finished difference Result 7519 states and 22298 transitions. [2021-06-05 22:53:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:53:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:27,634 INFO L225 Difference]: With dead ends: 7519 [2021-06-05 22:53:27,634 INFO L226 Difference]: Without dead ends: 7264 [2021-06-05 22:53:27,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1339.6ms TimeCoverageRelationStatistics Valid=207, Invalid=2549, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:53:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7264 states. [2021-06-05 22:53:27,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7264 to 6006. [2021-06-05 22:53:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6006 states, 6005 states have (on average 3.0) internal successors, (18015), 6005 states have internal predecessors, (18015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6006 states to 6006 states and 18015 transitions. [2021-06-05 22:53:27,707 INFO L78 Accepts]: Start accepts. Automaton has 6006 states and 18015 transitions. Word has length 37 [2021-06-05 22:53:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:27,707 INFO L482 AbstractCegarLoop]: Abstraction has 6006 states and 18015 transitions. [2021-06-05 22:53:27,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6006 states and 18015 transitions. [2021-06-05 22:53:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:27,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:27,714 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:27,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:27,930 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1378159546, now seen corresponding path program 44 times [2021-06-05 22:53:27,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:27,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733960106] [2021-06-05 22:53:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:28,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733960106] [2021-06-05 22:53:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733960106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467556378] [2021-06-05 22:53:28,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:28,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:53:28,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:53:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:28,728 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:28,728 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 25 treesize of output 13 [2021-06-05 22:53:28,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:28,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:28,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:28,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:53:28,933 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:28,933 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 29 treesize of output 17 [2021-06-05 22:53:28,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:28,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:28,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:28,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:53:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:29,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467556378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:29,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:29,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:29,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869052078] [2021-06-05 22:53:29,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:29,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:29,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:29,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:29,156 INFO L87 Difference]: Start difference. First operand 6006 states and 18015 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:31,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:31,558 INFO L93 Difference]: Finished difference Result 7310 states and 21710 transitions. [2021-06-05 22:53:31,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:53:31,558 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:31,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:31,567 INFO L225 Difference]: With dead ends: 7310 [2021-06-05 22:53:31,567 INFO L226 Difference]: Without dead ends: 7120 [2021-06-05 22:53:31,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 1949.9ms TimeCoverageRelationStatistics Valid=219, Invalid=3087, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:53:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7120 states. [2021-06-05 22:53:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7120 to 6069. [2021-06-05 22:53:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 2.9995056031641396) internal successors, (18201), 6068 states have internal predecessors, (18201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:31,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 18201 transitions. [2021-06-05 22:53:31,639 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 18201 transitions. Word has length 37 [2021-06-05 22:53:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:31,639 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 18201 transitions. [2021-06-05 22:53:31,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 18201 transitions. [2021-06-05 22:53:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:31,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:31,645 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:31,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 22:53:31,849 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:31,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:31,849 INFO L82 PathProgramCache]: Analyzing trace with hash -366204460, now seen corresponding path program 45 times [2021-06-05 22:53:31,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:31,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937677752] [2021-06-05 22:53:31,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:32,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:32,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937677752] [2021-06-05 22:53:32,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937677752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:32,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9569112] [2021-06-05 22:53:32,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:32,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:53:32,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:32,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:32,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:32,464 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:32,464 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 27 treesize of output 15 [2021-06-05 22:53:32,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:32,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:32,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:32,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:53:32,667 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:32,667 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 38 treesize of output 22 [2021-06-05 22:53:32,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:32,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:32,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:32,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:53:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:32,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9569112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:32,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:32,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:32,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562157698] [2021-06-05 22:53:32,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:32,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:32,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:32,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:32,866 INFO L87 Difference]: Start difference. First operand 6069 states and 18201 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:35,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:35,215 INFO L93 Difference]: Finished difference Result 7505 states and 22308 transitions. [2021-06-05 22:53:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:53:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:35,224 INFO L225 Difference]: With dead ends: 7505 [2021-06-05 22:53:35,224 INFO L226 Difference]: Without dead ends: 7318 [2021-06-05 22:53:35,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1850.0ms TimeCoverageRelationStatistics Valid=227, Invalid=3313, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:53:35,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7318 states. [2021-06-05 22:53:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7318 to 6054. [2021-06-05 22:53:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 2.9986783413183544) internal successors, (18151), 6053 states have internal predecessors, (18151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 18151 transitions. [2021-06-05 22:53:35,298 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 18151 transitions. Word has length 37 [2021-06-05 22:53:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:35,298 INFO L482 AbstractCegarLoop]: Abstraction has 6054 states and 18151 transitions. [2021-06-05 22:53:35,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:35,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 18151 transitions. [2021-06-05 22:53:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:35,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:35,304 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:35,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:35,504 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1748049680, now seen corresponding path program 46 times [2021-06-05 22:53:35,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:35,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005504095] [2021-06-05 22:53:35,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:35,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:35,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005504095] [2021-06-05 22:53:35,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005504095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:35,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416435293] [2021-06-05 22:53:35,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:35,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:53:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:35,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:36,070 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:53:36,071 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 29 treesize of output 13 [2021-06-05 22:53:36,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:36,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:36,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:36,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 22:53:36,317 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:36,317 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 30 treesize of output 18 [2021-06-05 22:53:36,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:36,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:36,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:36,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:53:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:36,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416435293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:36,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:36,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:36,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776554359] [2021-06-05 22:53:36,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:36,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:36,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:36,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:36,494 INFO L87 Difference]: Start difference. First operand 6054 states and 18151 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:38,863 INFO L93 Difference]: Finished difference Result 7386 states and 21941 transitions. [2021-06-05 22:53:38,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:53:38,864 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:38,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:38,873 INFO L225 Difference]: With dead ends: 7386 [2021-06-05 22:53:38,873 INFO L226 Difference]: Without dead ends: 7186 [2021-06-05 22:53:38,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1736.4ms TimeCoverageRelationStatistics Valid=219, Invalid=3203, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:53:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7186 states. [2021-06-05 22:53:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7186 to 6048. [2021-06-05 22:53:38,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6048 states, 6047 states have (on average 2.999503886224574) internal successors, (18138), 6047 states have internal predecessors, (18138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6048 states to 6048 states and 18138 transitions. [2021-06-05 22:53:38,945 INFO L78 Accepts]: Start accepts. Automaton has 6048 states and 18138 transitions. Word has length 37 [2021-06-05 22:53:38,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:38,945 INFO L482 AbstractCegarLoop]: Abstraction has 6048 states and 18138 transitions. [2021-06-05 22:53:38,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:38,945 INFO L276 IsEmpty]: Start isEmpty. Operand 6048 states and 18138 transitions. [2021-06-05 22:53:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:38,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:38,950 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:39,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:39,152 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:39,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1401385756, now seen corresponding path program 47 times [2021-06-05 22:53:39,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:39,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540879680] [2021-06-05 22:53:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:39,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:39,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540879680] [2021-06-05 22:53:39,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540879680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:39,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961765374] [2021-06-05 22:53:39,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:39,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:53:39,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:53:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:39,740 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:39,741 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 27 treesize of output 15 [2021-06-05 22:53:39,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:39,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:39,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:39,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:53:39,846 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:39,846 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 29 treesize of output 17 [2021-06-05 22:53:39,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:39,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:39,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:39,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 22:53:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:40,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961765374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:40,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:40,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:53:40,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113497349] [2021-06-05 22:53:40,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:53:40,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:40,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:53:40,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:53:40,016 INFO L87 Difference]: Start difference. First operand 6048 states and 18138 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:41,547 INFO L93 Difference]: Finished difference Result 7813 states and 23208 transitions. [2021-06-05 22:53:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:53:41,548 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:41,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:41,557 INFO L225 Difference]: With dead ends: 7813 [2021-06-05 22:53:41,557 INFO L226 Difference]: Without dead ends: 7591 [2021-06-05 22:53:41,558 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1310.3ms TimeCoverageRelationStatistics Valid=203, Invalid=2553, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:53:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7591 states. [2021-06-05 22:53:41,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7591 to 6027. [2021-06-05 22:53:41,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6027 states, 6026 states have (on average 2.9995021573182874) internal successors, (18075), 6026 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6027 states to 6027 states and 18075 transitions. [2021-06-05 22:53:41,630 INFO L78 Accepts]: Start accepts. Automaton has 6027 states and 18075 transitions. Word has length 37 [2021-06-05 22:53:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:41,630 INFO L482 AbstractCegarLoop]: Abstraction has 6027 states and 18075 transitions. [2021-06-05 22:53:41,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6027 states and 18075 transitions. [2021-06-05 22:53:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:41,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:41,636 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:41,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 22:53:41,836 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:41,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1563390986, now seen corresponding path program 48 times [2021-06-05 22:53:41,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:41,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315100009] [2021-06-05 22:53:41,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:42,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:42,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315100009] [2021-06-05 22:53:42,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315100009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:42,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843257331] [2021-06-05 22:53:42,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:42,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:53:42,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:42,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:42,403 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:42,403 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 27 treesize of output 15 [2021-06-05 22:53:42,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:42,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:42,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:42,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:53:42,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:42,604 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 38 treesize of output 22 [2021-06-05 22:53:42,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:42,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:42,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:42,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:53:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:42,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843257331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:42,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:42,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:42,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762670349] [2021-06-05 22:53:42,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:42,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:42,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:42,801 INFO L87 Difference]: Start difference. First operand 6027 states and 18075 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:45,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:45,348 INFO L93 Difference]: Finished difference Result 7640 states and 22718 transitions. [2021-06-05 22:53:45,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:53:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:45,357 INFO L225 Difference]: With dead ends: 7640 [2021-06-05 22:53:45,358 INFO L226 Difference]: Without dead ends: 7381 [2021-06-05 22:53:45,358 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1797.9ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:53:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7381 states. [2021-06-05 22:53:45,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7381 to 5997. [2021-06-05 22:53:45,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 3.0005003335557037) internal successors, (17991), 5996 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:45,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 17991 transitions. [2021-06-05 22:53:45,428 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 17991 transitions. Word has length 37 [2021-06-05 22:53:45,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:45,429 INFO L482 AbstractCegarLoop]: Abstraction has 5997 states and 17991 transitions. [2021-06-05 22:53:45,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:45,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 17991 transitions. [2021-06-05 22:53:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:45,434 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:45,434 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:45,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:45,635 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:45,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:45,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1176430760, now seen corresponding path program 49 times [2021-06-05 22:53:45,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:45,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253950608] [2021-06-05 22:53:45,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:45,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:45,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:45,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253950608] [2021-06-05 22:53:45,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253950608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:45,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500195832] [2021-06-05 22:53:45,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:45,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:46,137 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:53:46,137 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 31 treesize of output 15 [2021-06-05 22:53:46,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:46,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:46,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:46,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 22:53:46,353 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:46,353 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 29 treesize of output 17 [2021-06-05 22:53:46,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:46,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:46,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:46,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:53:46,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:46,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500195832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:46,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:46,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:46,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979523685] [2021-06-05 22:53:46,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:46,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:46,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:46,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:46,562 INFO L87 Difference]: Start difference. First operand 5997 states and 17991 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:48,802 INFO L93 Difference]: Finished difference Result 7271 states and 21602 transitions. [2021-06-05 22:53:48,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:53:48,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:48,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:48,811 INFO L225 Difference]: With dead ends: 7271 [2021-06-05 22:53:48,811 INFO L226 Difference]: Without dead ends: 7081 [2021-06-05 22:53:48,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1842.7ms TimeCoverageRelationStatistics Valid=264, Invalid=3396, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:53:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7081 states. [2021-06-05 22:53:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7081 to 6030. [2021-06-05 22:53:48,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 6029 states have (on average 3.000995189915409) internal successors, (18093), 6029 states have internal predecessors, (18093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:48,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 18093 transitions. [2021-06-05 22:53:48,885 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 18093 transitions. Word has length 37 [2021-06-05 22:53:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:48,885 INFO L482 AbstractCegarLoop]: Abstraction has 6030 states and 18093 transitions. [2021-06-05 22:53:48,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 18093 transitions. [2021-06-05 22:53:48,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:48,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:48,891 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:49,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 22:53:49,092 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1374172530, now seen corresponding path program 50 times [2021-06-05 22:53:49,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:49,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254040817] [2021-06-05 22:53:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:49,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254040817] [2021-06-05 22:53:49,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254040817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447750216] [2021-06-05 22:53:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:49,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:53:49,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:49,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:53:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:49,612 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:49,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:53:49,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:49,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:49,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:49,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:53:49,835 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:49,835 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 29 treesize of output 17 [2021-06-05 22:53:49,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:49,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:49,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:49,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:53:50,042 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:50,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447750216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:50,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:50,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:50,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748636576] [2021-06-05 22:53:50,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:50,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:50,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:50,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:50,043 INFO L87 Difference]: Start difference. First operand 6030 states and 18093 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:52,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:52,396 INFO L93 Difference]: Finished difference Result 7463 states and 22192 transitions. [2021-06-05 22:53:52,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:53:52,396 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:52,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:52,405 INFO L225 Difference]: With dead ends: 7463 [2021-06-05 22:53:52,406 INFO L226 Difference]: Without dead ends: 7276 [2021-06-05 22:53:52,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 1819.2ms TimeCoverageRelationStatistics Valid=223, Invalid=3199, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:53:52,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-05 22:53:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6015. [2021-06-05 22:53:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6015 states, 6014 states have (on average 3.0001662786830727) internal successors, (18043), 6014 states have internal predecessors, (18043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:52,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6015 states to 6015 states and 18043 transitions. [2021-06-05 22:53:52,480 INFO L78 Accepts]: Start accepts. Automaton has 6015 states and 18043 transitions. Word has length 37 [2021-06-05 22:53:52,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:52,480 INFO L482 AbstractCegarLoop]: Abstraction has 6015 states and 18043 transitions. [2021-06-05 22:53:52,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6015 states and 18043 transitions. [2021-06-05 22:53:52,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:52,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:52,486 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:52,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 22:53:52,686 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -806540626, now seen corresponding path program 51 times [2021-06-05 22:53:52,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:52,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484809945] [2021-06-05 22:53:52,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:53,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:53,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484809945] [2021-06-05 22:53:53,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484809945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:53,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331891689] [2021-06-05 22:53:53,058 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:53,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:53:53,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:53,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:53,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:53,300 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 29 treesize of output 17 [2021-06-05 22:53:53,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:53,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:53,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:53,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 22:53:53,572 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:53,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 22:53:53,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:53,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:53,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:53,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 22:53:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:53,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331891689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:53,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:53,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:53,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069237680] [2021-06-05 22:53:53,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:53,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:53,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:53,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:53,732 INFO L87 Difference]: Start difference. First operand 6015 states and 18043 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:56,330 INFO L93 Difference]: Finished difference Result 7363 states and 21872 transitions. [2021-06-05 22:53:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:53:56,331 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:53:56,339 INFO L225 Difference]: With dead ends: 7363 [2021-06-05 22:53:56,340 INFO L226 Difference]: Without dead ends: 7163 [2021-06-05 22:53:56,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1909.9ms TimeCoverageRelationStatistics Valid=249, Invalid=3657, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:53:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7163 states. [2021-06-05 22:53:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7163 to 6009. [2021-06-05 22:53:56,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6009 states, 6008 states have (on average 3.0009986684420773) internal successors, (18030), 6008 states have internal predecessors, (18030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6009 states to 6009 states and 18030 transitions. [2021-06-05 22:53:56,409 INFO L78 Accepts]: Start accepts. Automaton has 6009 states and 18030 transitions. Word has length 37 [2021-06-05 22:53:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:53:56,409 INFO L482 AbstractCegarLoop]: Abstraction has 6009 states and 18030 transitions. [2021-06-05 22:53:56,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6009 states and 18030 transitions. [2021-06-05 22:53:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:53:56,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:53:56,415 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:53:56,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:56,617 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:53:56,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:53:56,617 INFO L82 PathProgramCache]: Analyzing trace with hash 338991234, now seen corresponding path program 52 times [2021-06-05 22:53:56,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:53:56,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170641527] [2021-06-05 22:53:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:53:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:53:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:56,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:53:56,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170641527] [2021-06-05 22:53:56,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170641527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:56,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283339189] [2021-06-05 22:53:56,924 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:53:56,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:53:56,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:53:56,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:53:56,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:53:57,132 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:53:57,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 22:53:57,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:57,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:57,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:57,140 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 22:53:57,360 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:53:57,360 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 29 treesize of output 17 [2021-06-05 22:53:57,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:53:57,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:53:57,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:53:57,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:53:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:53:57,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283339189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:53:57,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:53:57,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:53:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031132016] [2021-06-05 22:53:57,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:53:57,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:53:57,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:53:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:53:57,570 INFO L87 Difference]: Start difference. First operand 6009 states and 18030 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:53:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:53:59,990 INFO L93 Difference]: Finished difference Result 7661 states and 22805 transitions. [2021-06-05 22:53:59,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:53:59,990 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:53:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:00,000 INFO L225 Difference]: With dead ends: 7661 [2021-06-05 22:54:00,000 INFO L226 Difference]: Without dead ends: 7474 [2021-06-05 22:54:00,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1758.7ms TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:54:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7474 states. [2021-06-05 22:54:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7474 to 5997. [2021-06-05 22:54:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5997 states, 5996 states have (on average 3.0) internal successors, (17988), 5996 states have internal predecessors, (17988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 17988 transitions. [2021-06-05 22:54:00,076 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 17988 transitions. Word has length 37 [2021-06-05 22:54:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:00,076 INFO L482 AbstractCegarLoop]: Abstraction has 5997 states and 17988 transitions. [2021-06-05 22:54:00,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 17988 transitions. [2021-06-05 22:54:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:00,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:00,082 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:00,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:00,283 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1841721922, now seen corresponding path program 53 times [2021-06-05 22:54:00,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:00,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033788218] [2021-06-05 22:54:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:00,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033788218] [2021-06-05 22:54:00,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033788218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:00,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916497010] [2021-06-05 22:54:00,601 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:00,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:54:00,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:00,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 22:54:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:00,808 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:00,809 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 27 treesize of output 15 [2021-06-05 22:54:00,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:00,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:00,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:00,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:54:00,974 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:00,975 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 27 treesize of output 15 [2021-06-05 22:54:00,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:00,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:00,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:00,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 22:54:01,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:01,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916497010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:01,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:01,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:54:01,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044935864] [2021-06-05 22:54:01,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:54:01,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:01,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:54:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1106, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:54:01,137 INFO L87 Difference]: Start difference. First operand 5997 states and 17988 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:02,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:02,888 INFO L93 Difference]: Finished difference Result 7627 states and 22648 transitions. [2021-06-05 22:54:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:54:02,888 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:02,897 INFO L225 Difference]: With dead ends: 7627 [2021-06-05 22:54:02,897 INFO L226 Difference]: Without dead ends: 7411 [2021-06-05 22:54:02,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1380.8ms TimeCoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 22:54:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-06-05 22:54:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6054. [2021-06-05 22:54:02,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6054 states, 6053 states have (on average 3.000165207335206) internal successors, (18160), 6053 states have internal predecessors, (18160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6054 states to 6054 states and 18160 transitions. [2021-06-05 22:54:02,968 INFO L78 Accepts]: Start accepts. Automaton has 6054 states and 18160 transitions. Word has length 37 [2021-06-05 22:54:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:02,968 INFO L482 AbstractCegarLoop]: Abstraction has 6054 states and 18160 transitions. [2021-06-05 22:54:02,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 6054 states and 18160 transitions. [2021-06-05 22:54:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:02,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:02,975 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:03,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:03,175 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:03,175 INFO L82 PathProgramCache]: Analyzing trace with hash 176986004, now seen corresponding path program 54 times [2021-06-05 22:54:03,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:03,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124609456] [2021-06-05 22:54:03,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:03,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:03,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124609456] [2021-06-05 22:54:03,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124609456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:03,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360293257] [2021-06-05 22:54:03,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:03,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:54:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:54:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:03,742 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:03,742 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 27 treesize of output 15 [2021-06-05 22:54:03,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:03,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:03,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:03,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:54:03,967 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:03,967 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 36 treesize of output 20 [2021-06-05 22:54:03,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:03,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:03,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:03,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 22:54:04,159 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:04,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360293257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:04,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:04,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:04,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371354374] [2021-06-05 22:54:04,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:04,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:04,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:04,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:04,160 INFO L87 Difference]: Start difference. First operand 6054 states and 18160 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:06,434 INFO L93 Difference]: Finished difference Result 7609 states and 22651 transitions. [2021-06-05 22:54:06,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:54:06,435 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:06,444 INFO L225 Difference]: With dead ends: 7609 [2021-06-05 22:54:06,444 INFO L226 Difference]: Without dead ends: 7359 [2021-06-05 22:54:06,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1821.2ms TimeCoverageRelationStatistics Valid=254, Invalid=3406, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:54:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7359 states. [2021-06-05 22:54:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7359 to 6003. [2021-06-05 22:54:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 6002 states have (on average 3.002832389203599) internal successors, (18023), 6002 states have internal predecessors, (18023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 18023 transitions. [2021-06-05 22:54:06,512 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 18023 transitions. Word has length 37 [2021-06-05 22:54:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:06,512 INFO L482 AbstractCegarLoop]: Abstraction has 6003 states and 18023 transitions. [2021-06-05 22:54:06,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 18023 transitions. [2021-06-05 22:54:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:06,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:06,518 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:06,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 22:54:06,719 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash -956005634, now seen corresponding path program 55 times [2021-06-05 22:54:06,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:06,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63519244] [2021-06-05 22:54:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:07,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63519244] [2021-06-05 22:54:07,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63519244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30210357] [2021-06-05 22:54:07,025 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:54:07,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:07,269 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:07,270 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 27 treesize of output 15 [2021-06-05 22:54:07,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:07,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:07,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:07,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:54:07,505 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:07,506 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 29 treesize of output 17 [2021-06-05 22:54:07,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:07,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:07,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:07,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:07,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30210357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:07,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:07,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:07,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376902965] [2021-06-05 22:54:07,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:07,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:07,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:07,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:07,713 INFO L87 Difference]: Start difference. First operand 6003 states and 18023 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:10,366 INFO L93 Difference]: Finished difference Result 7853 states and 23572 transitions. [2021-06-05 22:54:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:54:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:10,376 INFO L225 Difference]: With dead ends: 7853 [2021-06-05 22:54:10,376 INFO L226 Difference]: Without dead ends: 7774 [2021-06-05 22:54:10,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1904.6ms TimeCoverageRelationStatistics Valid=258, Invalid=3524, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:54:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7774 states. [2021-06-05 22:54:10,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7774 to 5995. [2021-06-05 22:54:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5995 states, 5994 states have (on average 3.002836169502836) internal successors, (17999), 5994 states have internal predecessors, (17999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5995 states to 5995 states and 17999 transitions. [2021-06-05 22:54:10,448 INFO L78 Accepts]: Start accepts. Automaton has 5995 states and 17999 transitions. Word has length 37 [2021-06-05 22:54:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:10,448 INFO L482 AbstractCegarLoop]: Abstraction has 5995 states and 17999 transitions. [2021-06-05 22:54:10,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5995 states and 17999 transitions. [2021-06-05 22:54:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:10,454 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:10,454 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:10,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:10,654 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:10,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1158248506, now seen corresponding path program 56 times [2021-06-05 22:54:10,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:10,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080457364] [2021-06-05 22:54:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:10,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:10,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080457364] [2021-06-05 22:54:10,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080457364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:10,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977326809] [2021-06-05 22:54:10,958 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:10,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:54:10,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:10,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:54:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:11,176 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:11,177 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 27 treesize of output 15 [2021-06-05 22:54:11,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:11,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:11,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:11,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:54:11,448 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:11,448 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 30 treesize of output 18 [2021-06-05 22:54:11,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:11,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:11,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:11,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:54:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977326809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:11,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:11,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516673476] [2021-06-05 22:54:11,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:11,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:11,621 INFO L87 Difference]: Start difference. First operand 5995 states and 17999 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:14,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:14,321 INFO L93 Difference]: Finished difference Result 8024 states and 24069 transitions. [2021-06-05 22:54:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:54:14,322 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:14,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:14,332 INFO L225 Difference]: With dead ends: 8024 [2021-06-05 22:54:14,332 INFO L226 Difference]: Without dead ends: 7945 [2021-06-05 22:54:14,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1976.1ms TimeCoverageRelationStatistics Valid=283, Invalid=3749, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:54:14,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-05 22:54:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 5992. [2021-06-05 22:54:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5991 states have (on average 3.0030045067601403) internal successors, (17991), 5991 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 17991 transitions. [2021-06-05 22:54:14,407 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 17991 transitions. Word has length 37 [2021-06-05 22:54:14,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:14,407 INFO L482 AbstractCegarLoop]: Abstraction has 5992 states and 17991 transitions. [2021-06-05 22:54:14,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:14,407 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 17991 transitions. [2021-06-05 22:54:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:14,436 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:14,436 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:14,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 22:54:14,637 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:14,641 INFO L82 PathProgramCache]: Analyzing trace with hash -48622644, now seen corresponding path program 57 times [2021-06-05 22:54:14,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:14,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278564757] [2021-06-05 22:54:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:14,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:14,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278564757] [2021-06-05 22:54:14,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278564757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:14,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126728185] [2021-06-05 22:54:14,929 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:14,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:54:14,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:14,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:54:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:15,145 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:15,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:54:15,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:15,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:15,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:15,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:54:15,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:54:15,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:54:15,563 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 35 treesize of output 25 [2021-06-05 22:54:15,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:15,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:15,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:15,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:59, output treesize:23 [2021-06-05 22:54:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:15,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126728185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:15,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:15,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:15,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009732004] [2021-06-05 22:54:15,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:15,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:15,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:15,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1253, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:15,741 INFO L87 Difference]: Start difference. First operand 5992 states and 17991 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:18,532 INFO L93 Difference]: Finished difference Result 7723 states and 23124 transitions. [2021-06-05 22:54:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:54:18,532 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:18,542 INFO L225 Difference]: With dead ends: 7723 [2021-06-05 22:54:18,542 INFO L226 Difference]: Without dead ends: 7644 [2021-06-05 22:54:18,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 2120.1ms TimeCoverageRelationStatistics Valid=247, Invalid=3293, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:54:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7644 states. [2021-06-05 22:54:18,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7644 to 5992. [2021-06-05 22:54:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5992 states, 5991 states have (on average 3.0030045067601403) internal successors, (17991), 5991 states have internal predecessors, (17991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5992 states to 5992 states and 17991 transitions. [2021-06-05 22:54:18,618 INFO L78 Accepts]: Start accepts. Automaton has 5992 states and 17991 transitions. Word has length 37 [2021-06-05 22:54:18,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:18,618 INFO L482 AbstractCegarLoop]: Abstraction has 5992 states and 17991 transitions. [2021-06-05 22:54:18,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5992 states and 17991 transitions. [2021-06-05 22:54:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:18,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:18,624 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:18,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 22:54:18,824 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:18,825 INFO L82 PathProgramCache]: Analyzing trace with hash -673013410, now seen corresponding path program 58 times [2021-06-05 22:54:18,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:18,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584308702] [2021-06-05 22:54:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:19,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:19,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584308702] [2021-06-05 22:54:19,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584308702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:19,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825078562] [2021-06-05 22:54:19,188 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:19,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:54:19,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:19,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:54:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:19,552 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:19,552 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 25 treesize of output 13 [2021-06-05 22:54:19,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:19,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:19,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:19,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:54:19,630 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:19,630 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 29 treesize of output 17 [2021-06-05 22:54:19,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:19,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:19,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:19,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:19,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825078562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:19,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:19,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 22:54:19,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520250649] [2021-06-05 22:54:19,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 22:54:19,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 22:54:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1290, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:54:19,810 INFO L87 Difference]: Start difference. First operand 5992 states and 17991 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:24,970 INFO L93 Difference]: Finished difference Result 15123 states and 44674 transitions. [2021-06-05 22:54:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 22:54:24,971 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:24,990 INFO L225 Difference]: With dead ends: 15123 [2021-06-05 22:54:24,990 INFO L226 Difference]: Without dead ends: 14752 [2021-06-05 22:54:24,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4647 ImplicationChecksByTransitivity, 4274.3ms TimeCoverageRelationStatistics Valid=1442, Invalid=13810, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 22:54:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14752 states. [2021-06-05 22:54:25,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14752 to 6984. [2021-06-05 22:54:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6984 states, 6983 states have (on average 3.0221967635686666) internal successors, (21104), 6983 states have internal predecessors, (21104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6984 states to 6984 states and 21104 transitions. [2021-06-05 22:54:25,113 INFO L78 Accepts]: Start accepts. Automaton has 6984 states and 21104 transitions. Word has length 37 [2021-06-05 22:54:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:25,113 INFO L482 AbstractCegarLoop]: Abstraction has 6984 states and 21104 transitions. [2021-06-05 22:54:25,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6984 states and 21104 transitions. [2021-06-05 22:54:25,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:25,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:25,121 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:25,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 22:54:25,321 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1023292830, now seen corresponding path program 59 times [2021-06-05 22:54:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:25,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40056699] [2021-06-05 22:54:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:25,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40056699] [2021-06-05 22:54:25,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40056699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237311316] [2021-06-05 22:54:25,742 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:25,783 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:54:25,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:25,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 22:54:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:26,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:54:26,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:54:26,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:54:26,162 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 25 treesize of output 13 [2021-06-05 22:54:26,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:26,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:26,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:26,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:29 [2021-06-05 22:54:26,247 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:26,247 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 29 treesize of output 17 [2021-06-05 22:54:26,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:26,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:26,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:26,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:26,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:26,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237311316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:26,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:26,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:26,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396717671] [2021-06-05 22:54:26,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:26,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:26,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:26,459 INFO L87 Difference]: Start difference. First operand 6984 states and 21104 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:31,011 INFO L93 Difference]: Finished difference Result 11739 states and 35096 transitions. [2021-06-05 22:54:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 22:54:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:31,025 INFO L225 Difference]: With dead ends: 11739 [2021-06-05 22:54:31,026 INFO L226 Difference]: Without dead ends: 11268 [2021-06-05 22:54:31,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2942.8ms TimeCoverageRelationStatistics Valid=463, Invalid=7369, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 22:54:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11268 states. [2021-06-05 22:54:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11268 to 7469. [2021-06-05 22:54:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7469 states, 7468 states have (on average 3.0265131226566684) internal successors, (22602), 7468 states have internal predecessors, (22602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7469 states to 7469 states and 22602 transitions. [2021-06-05 22:54:31,153 INFO L78 Accepts]: Start accepts. Automaton has 7469 states and 22602 transitions. Word has length 37 [2021-06-05 22:54:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:31,153 INFO L482 AbstractCegarLoop]: Abstraction has 7469 states and 22602 transitions. [2021-06-05 22:54:31,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 7469 states and 22602 transitions. [2021-06-05 22:54:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:31,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:31,160 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:31,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:31,361 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash -786061334, now seen corresponding path program 60 times [2021-06-05 22:54:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:31,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465940813] [2021-06-05 22:54:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:31,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:31,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465940813] [2021-06-05 22:54:31,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465940813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:31,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264966932] [2021-06-05 22:54:31,746 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:31,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:54:31,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:31,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:54:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:32,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:32,106 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 31 treesize of output 19 [2021-06-05 22:54:32,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:32,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:32,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:32,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 22:54:32,188 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:32,189 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 43 treesize of output 23 [2021-06-05 22:54:32,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:32,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:32,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:32,196 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:54:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:32,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264966932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:32,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:32,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:32,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323314862] [2021-06-05 22:54:32,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:32,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:32,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:32,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:32,374 INFO L87 Difference]: Start difference. First operand 7469 states and 22602 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:35,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:35,251 INFO L93 Difference]: Finished difference Result 10651 states and 31890 transitions. [2021-06-05 22:54:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:54:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:35,265 INFO L225 Difference]: With dead ends: 10651 [2021-06-05 22:54:35,265 INFO L226 Difference]: Without dead ends: 10387 [2021-06-05 22:54:35,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2022.6ms TimeCoverageRelationStatistics Valid=283, Invalid=4007, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 22:54:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10387 states. [2021-06-05 22:54:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10387 to 7433. [2021-06-05 22:54:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7433 states, 7432 states have (on average 3.0278525296017222) internal successors, (22503), 7432 states have internal predecessors, (22503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7433 states to 7433 states and 22503 transitions. [2021-06-05 22:54:35,367 INFO L78 Accepts]: Start accepts. Automaton has 7433 states and 22503 transitions. Word has length 37 [2021-06-05 22:54:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:35,367 INFO L482 AbstractCegarLoop]: Abstraction has 7433 states and 22503 transitions. [2021-06-05 22:54:35,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7433 states and 22503 transitions. [2021-06-05 22:54:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:35,375 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:35,375 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:35,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:35,576 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:35,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1016751930, now seen corresponding path program 61 times [2021-06-05 22:54:35,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:35,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284734764] [2021-06-05 22:54:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:35,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284734764] [2021-06-05 22:54:35,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284734764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:35,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508831753] [2021-06-05 22:54:35,907 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:54:35,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:36,270 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:36,270 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 25 treesize of output 13 [2021-06-05 22:54:36,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:36,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:36,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:36,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:54:36,360 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:36,360 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 29 treesize of output 17 [2021-06-05 22:54:36,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:36,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:36,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:36,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:36,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508831753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:36,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:36,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:36,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328870089] [2021-06-05 22:54:36,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:36,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:36,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:36,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:36,537 INFO L87 Difference]: Start difference. First operand 7433 states and 22503 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:38,998 INFO L93 Difference]: Finished difference Result 11447 states and 33952 transitions. [2021-06-05 22:54:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:54:38,998 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:39,011 INFO L225 Difference]: With dead ends: 11447 [2021-06-05 22:54:39,011 INFO L226 Difference]: Without dead ends: 11273 [2021-06-05 22:54:39,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2348.7ms TimeCoverageRelationStatistics Valid=584, Invalid=5422, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 22:54:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11273 states. [2021-06-05 22:54:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11273 to 7538. [2021-06-05 22:54:39,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7538 states, 7537 states have (on average 3.02162664189996) internal successors, (22774), 7537 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 22774 transitions. [2021-06-05 22:54:39,114 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 22774 transitions. Word has length 37 [2021-06-05 22:54:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:39,115 INFO L482 AbstractCegarLoop]: Abstraction has 7538 states and 22774 transitions. [2021-06-05 22:54:39,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:39,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 22774 transitions. [2021-06-05 22:54:39,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:39,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:39,122 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:39,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 22:54:39,323 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:39,323 INFO L82 PathProgramCache]: Analyzing trace with hash 679554310, now seen corresponding path program 62 times [2021-06-05 22:54:39,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:39,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144135256] [2021-06-05 22:54:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:39,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:39,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:39,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144135256] [2021-06-05 22:54:39,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144135256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:39,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849282948] [2021-06-05 22:54:39,642 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:39,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:54:39,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:39,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:54:39,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:39,978 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:39,979 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 25 treesize of output 13 [2021-06-05 22:54:39,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:39,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:39,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:39,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:54:40,058 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:40,058 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 29 treesize of output 17 [2021-06-05 22:54:40,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:40,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:40,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:40,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:40,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849282948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:40,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:40,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 22:54:40,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687385956] [2021-06-05 22:54:40,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:54:40,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:40,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:54:40,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:54:40,263 INFO L87 Difference]: Start difference. First operand 7538 states and 22774 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:42,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:42,344 INFO L93 Difference]: Finished difference Result 9009 states and 27002 transitions. [2021-06-05 22:54:42,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:54:42,345 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:42,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:42,356 INFO L225 Difference]: With dead ends: 9009 [2021-06-05 22:54:42,356 INFO L226 Difference]: Without dead ends: 8777 [2021-06-05 22:54:42,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1682.7ms TimeCoverageRelationStatistics Valid=235, Invalid=3187, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:54:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8777 states. [2021-06-05 22:54:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8777 to 7508. [2021-06-05 22:54:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7508 states, 7507 states have (on average 3.026775009990675) internal successors, (22722), 7507 states have internal predecessors, (22722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7508 states to 7508 states and 22722 transitions. [2021-06-05 22:54:42,450 INFO L78 Accepts]: Start accepts. Automaton has 7508 states and 22722 transitions. Word has length 37 [2021-06-05 22:54:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:42,451 INFO L482 AbstractCegarLoop]: Abstraction has 7508 states and 22722 transitions. [2021-06-05 22:54:42,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 7508 states and 22722 transitions. [2021-06-05 22:54:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:42,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:42,458 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:42,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 22:54:42,658 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:42,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:42,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1445512958, now seen corresponding path program 63 times [2021-06-05 22:54:42,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:42,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971525802] [2021-06-05 22:54:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:42,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:42,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971525802] [2021-06-05 22:54:42,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971525802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:42,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997477474] [2021-06-05 22:54:42,987 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:43,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:54:43,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:43,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:54:43,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:43,215 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:43,216 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 27 treesize of output 15 [2021-06-05 22:54:43,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:43,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:43,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:43,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:54:43,386 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:43,387 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 29 treesize of output 17 [2021-06-05 22:54:43,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:43,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:43,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:43,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:43,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997477474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:43,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:43,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:43,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579422131] [2021-06-05 22:54:43,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:43,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:43,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:43,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:43,568 INFO L87 Difference]: Start difference. First operand 7508 states and 22722 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:47,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:47,088 INFO L93 Difference]: Finished difference Result 12734 states and 37798 transitions. [2021-06-05 22:54:47,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:54:47,088 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:47,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:47,104 INFO L225 Difference]: With dead ends: 12734 [2021-06-05 22:54:47,104 INFO L226 Difference]: Without dead ends: 12455 [2021-06-05 22:54:47,105 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 2775.4ms TimeCoverageRelationStatistics Valid=653, Invalid=6319, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 22:54:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12455 states. [2021-06-05 22:54:47,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12455 to 7592. [2021-06-05 22:54:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7592 states, 7591 states have (on average 3.0243709656171784) internal successors, (22958), 7591 states have internal predecessors, (22958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7592 states to 7592 states and 22958 transitions. [2021-06-05 22:54:47,218 INFO L78 Accepts]: Start accepts. Automaton has 7592 states and 22958 transitions. Word has length 37 [2021-06-05 22:54:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:47,218 INFO L482 AbstractCegarLoop]: Abstraction has 7592 states and 22958 transitions. [2021-06-05 22:54:47,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7592 states and 22958 transitions. [2021-06-05 22:54:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:47,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:47,226 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:47,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:47,427 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:47,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:47,427 INFO L82 PathProgramCache]: Analyzing trace with hash 250793282, now seen corresponding path program 64 times [2021-06-05 22:54:47,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:47,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924080089] [2021-06-05 22:54:47,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:47,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:47,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924080089] [2021-06-05 22:54:47,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924080089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:47,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782196175] [2021-06-05 22:54:47,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:47,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:54:47,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:54:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:48,007 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:54:48,007 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 31 treesize of output 15 [2021-06-05 22:54:48,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:48,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:48,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:48,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:54:48,192 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:48,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:54:48,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:48,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:48,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:48,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:48,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782196175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:48,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:48,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:48,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689054833] [2021-06-05 22:54:48,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:48,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:48,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:48,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:48,449 INFO L87 Difference]: Start difference. First operand 7592 states and 22958 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:50,777 INFO L93 Difference]: Finished difference Result 9142 states and 27401 transitions. [2021-06-05 22:54:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:54:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:50,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:50,789 INFO L225 Difference]: With dead ends: 9142 [2021-06-05 22:54:50,789 INFO L226 Difference]: Without dead ends: 8975 [2021-06-05 22:54:50,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1910.6ms TimeCoverageRelationStatistics Valid=249, Invalid=3533, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:54:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8975 states. [2021-06-05 22:54:50,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8975 to 7577. [2021-06-05 22:54:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7577 states, 7576 states have (on average 3.0258711721224922) internal successors, (22924), 7576 states have internal predecessors, (22924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7577 states to 7577 states and 22924 transitions. [2021-06-05 22:54:50,886 INFO L78 Accepts]: Start accepts. Automaton has 7577 states and 22924 transitions. Word has length 37 [2021-06-05 22:54:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:50,886 INFO L482 AbstractCegarLoop]: Abstraction has 7577 states and 22924 transitions. [2021-06-05 22:54:50,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 7577 states and 22924 transitions. [2021-06-05 22:54:50,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:50,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:50,893 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:51,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 22:54:51,094 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:51,094 INFO L82 PathProgramCache]: Analyzing trace with hash 785550070, now seen corresponding path program 65 times [2021-06-05 22:54:51,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:51,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308241693] [2021-06-05 22:54:51,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:51,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308241693] [2021-06-05 22:54:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308241693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668475709] [2021-06-05 22:54:51,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:51,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:54:51,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:51,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:54:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:51,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:51,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:54:51,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:51,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:51,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:51,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:54:51,804 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:51,805 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 31 treesize of output 19 [2021-06-05 22:54:51,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:51,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:51,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:51,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:54:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:51,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668475709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:51,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:51,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:54:51,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883282230] [2021-06-05 22:54:51,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:54:51,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:51,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:54:51,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:54:51,963 INFO L87 Difference]: Start difference. First operand 7577 states and 22924 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:53,566 INFO L93 Difference]: Finished difference Result 11020 states and 32999 transitions. [2021-06-05 22:54:53,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:54:53,567 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:53,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:53,581 INFO L225 Difference]: With dead ends: 11020 [2021-06-05 22:54:53,581 INFO L226 Difference]: Without dead ends: 10795 [2021-06-05 22:54:53,581 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1407.1ms TimeCoverageRelationStatistics Valid=249, Invalid=2943, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:54:53,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10795 states. [2021-06-05 22:54:53,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10795 to 7607. [2021-06-05 22:54:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7607 states, 7606 states have (on average 3.0262950302392846) internal successors, (23018), 7606 states have internal predecessors, (23018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:53,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 23018 transitions. [2021-06-05 22:54:53,685 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 23018 transitions. Word has length 37 [2021-06-05 22:54:53,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:53,685 INFO L482 AbstractCegarLoop]: Abstraction has 7607 states and 23018 transitions. [2021-06-05 22:54:53,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:53,685 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 23018 transitions. [2021-06-05 22:54:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:53,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:53,692 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:53,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:53,893 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash -92096194, now seen corresponding path program 66 times [2021-06-05 22:54:53,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:53,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882180501] [2021-06-05 22:54:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:54,237 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:54,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:54,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882180501] [2021-06-05 22:54:54,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882180501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:54,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280564762] [2021-06-05 22:54:54,237 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:54,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:54:54,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:54:54,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:54:54,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:54,474 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:54,474 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 27 treesize of output 15 [2021-06-05 22:54:54,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:54,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:54,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:54,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:54:54,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:54,655 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 36 treesize of output 20 [2021-06-05 22:54:54,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:54,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:54,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:54,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 22:54:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:54,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280564762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:54,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:54,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:54,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080111523] [2021-06-05 22:54:54,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:54,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:54,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:54,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:54,833 INFO L87 Difference]: Start difference. First operand 7607 states and 23018 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:54:57,582 INFO L93 Difference]: Finished difference Result 10794 states and 31781 transitions. [2021-06-05 22:54:57,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 22:54:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:54:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:54:57,596 INFO L225 Difference]: With dead ends: 10794 [2021-06-05 22:54:57,596 INFO L226 Difference]: Without dead ends: 10591 [2021-06-05 22:54:57,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 2424.0ms TimeCoverageRelationStatistics Valid=551, Invalid=5769, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:54:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10591 states. [2021-06-05 22:54:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10591 to 7648. [2021-06-05 22:54:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7647 states have (on average 3.024192493788414) internal successors, (23126), 7647 states have internal predecessors, (23126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 23126 transitions. [2021-06-05 22:54:57,699 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 23126 transitions. Word has length 37 [2021-06-05 22:54:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:54:57,700 INFO L482 AbstractCegarLoop]: Abstraction has 7648 states and 23126 transitions. [2021-06-05 22:54:57,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:54:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 23126 transitions. [2021-06-05 22:54:57,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:54:57,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:54:57,707 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:54:57,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-05 22:54:57,908 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:54:57,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:54:57,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1604210046, now seen corresponding path program 67 times [2021-06-05 22:54:57,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:54:57,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614688990] [2021-06-05 22:54:57,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:54:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:58,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:54:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614688990] [2021-06-05 22:54:58,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614688990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:58,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542231815] [2021-06-05 22:54:58,232 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:54:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:54:58,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:54:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:54:58,486 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:54:58,486 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 29 treesize of output 13 [2021-06-05 22:54:58,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:58,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:58,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:58,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 22:54:58,674 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:54:58,675 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 29 treesize of output 17 [2021-06-05 22:54:58,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:54:58,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:54:58,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:54:58,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:54:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:54:58,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542231815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:54:58,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:54:58,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:54:58,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867174759] [2021-06-05 22:54:58,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:54:58,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:54:58,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:54:58,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:54:58,887 INFO L87 Difference]: Start difference. First operand 7648 states and 23126 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:01,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:01,242 INFO L93 Difference]: Finished difference Result 9289 states and 27935 transitions. [2021-06-05 22:55:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:55:01,243 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:01,254 INFO L225 Difference]: With dead ends: 9289 [2021-06-05 22:55:01,254 INFO L226 Difference]: Without dead ends: 9125 [2021-06-05 22:55:01,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1781.7ms TimeCoverageRelationStatistics Valid=238, Invalid=3422, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:55:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9125 states. [2021-06-05 22:55:01,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 7732. [2021-06-05 22:55:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7732 states, 7731 states have (on average 3.024835079549864) internal successors, (23385), 7731 states have internal predecessors, (23385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7732 states to 7732 states and 23385 transitions. [2021-06-05 22:55:01,350 INFO L78 Accepts]: Start accepts. Automaton has 7732 states and 23385 transitions. Word has length 37 [2021-06-05 22:55:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:01,350 INFO L482 AbstractCegarLoop]: Abstraction has 7732 states and 23385 transitions. [2021-06-05 22:55:01,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 7732 states and 23385 transitions. [2021-06-05 22:55:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:01,358 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:01,358 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:01,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 22:55:01,558 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash -576503110, now seen corresponding path program 68 times [2021-06-05 22:55:01,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:01,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094962106] [2021-06-05 22:55:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:01,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:01,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094962106] [2021-06-05 22:55:01,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094962106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:01,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036848537] [2021-06-05 22:55:01,882 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:01,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:55:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:01,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:55:01,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:02,190 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:02,190 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 27 treesize of output 15 [2021-06-05 22:55:02,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:02,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:02,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:02,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:55:02,464 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:02,464 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 30 treesize of output 18 [2021-06-05 22:55:02,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:02,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:02,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:02,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:55:02,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:02,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036848537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:02,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:02,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:02,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883841412] [2021-06-05 22:55:02,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:02,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:02,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:02,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:02,652 INFO L87 Difference]: Start difference. First operand 7732 states and 23385 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:05,040 INFO L93 Difference]: Finished difference Result 9355 states and 28210 transitions. [2021-06-05 22:55:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:55:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:05,052 INFO L225 Difference]: With dead ends: 9355 [2021-06-05 22:55:05,052 INFO L226 Difference]: Without dead ends: 9181 [2021-06-05 22:55:05,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1922.5ms TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:55:05,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2021-06-05 22:55:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 7751. [2021-06-05 22:55:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7751 states, 7750 states have (on average 3.025161290322581) internal successors, (23445), 7750 states have internal predecessors, (23445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:05,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7751 states to 7751 states and 23445 transitions. [2021-06-05 22:55:05,148 INFO L78 Accepts]: Start accepts. Automaton has 7751 states and 23445 transitions. Word has length 37 [2021-06-05 22:55:05,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:05,148 INFO L482 AbstractCegarLoop]: Abstraction has 7751 states and 23445 transitions. [2021-06-05 22:55:05,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 7751 states and 23445 transitions. [2021-06-05 22:55:05,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:05,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:05,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:05,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 22:55:05,366 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:05,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1783374260, now seen corresponding path program 69 times [2021-06-05 22:55:05,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:05,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160994056] [2021-06-05 22:55:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:05,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:05,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:05,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160994056] [2021-06-05 22:55:05,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160994056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:05,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393078640] [2021-06-05 22:55:05,710 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:05,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:55:05,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:05,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:55:05,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:05,960 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:05,961 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 27 treesize of output 15 [2021-06-05 22:55:05,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:05,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:05,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:05,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:55:06,212 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 22:55:06,358 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:06,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-06-05 22:55:06,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:06,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:06,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:06,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:21 [2021-06-05 22:55:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:06,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393078640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:06,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:06,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:06,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376603443] [2021-06-05 22:55:06,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:06,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:06,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:06,545 INFO L87 Difference]: Start difference. First operand 7751 states and 23445 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:08,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:08,859 INFO L93 Difference]: Finished difference Result 9507 states and 28682 transitions. [2021-06-05 22:55:08,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:55:08,859 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:08,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:08,871 INFO L225 Difference]: With dead ends: 9507 [2021-06-05 22:55:08,871 INFO L226 Difference]: Without dead ends: 9289 [2021-06-05 22:55:08,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1866.1ms TimeCoverageRelationStatistics Valid=215, Invalid=2977, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 22:55:08,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9289 states. [2021-06-05 22:55:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9289 to 7726. [2021-06-05 22:55:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7725 states have (on average 3.029514563106796) internal successors, (23403), 7725 states have internal predecessors, (23403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 23403 transitions. [2021-06-05 22:55:08,972 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 23403 transitions. Word has length 37 [2021-06-05 22:55:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:08,972 INFO L482 AbstractCegarLoop]: Abstraction has 7726 states and 23403 transitions. [2021-06-05 22:55:08,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 23403 transitions. [2021-06-05 22:55:08,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:08,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:08,983 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:09,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:09,193 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1549469464, now seen corresponding path program 70 times [2021-06-05 22:55:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:09,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242162544] [2021-06-05 22:55:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:09,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:09,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242162544] [2021-06-05 22:55:09,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242162544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:09,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188601842] [2021-06-05 22:55:09,526 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:09,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:55:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:55:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:09,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:09,846 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 25 treesize of output 13 [2021-06-05 22:55:09,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:09,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:09,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:09,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:55:09,917 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:09,917 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 29 treesize of output 17 [2021-06-05 22:55:09,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:09,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:09,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:09,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:55:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:10,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188601842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:10,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:10,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 22:55:10,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348375886] [2021-06-05 22:55:10,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:55:10,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:10,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:55:10,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:55:10,092 INFO L87 Difference]: Start difference. First operand 7726 states and 23403 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:14,678 INFO L93 Difference]: Finished difference Result 16463 states and 48777 transitions. [2021-06-05 22:55:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 22:55:14,679 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:14,701 INFO L225 Difference]: With dead ends: 16463 [2021-06-05 22:55:14,702 INFO L226 Difference]: Without dead ends: 16129 [2021-06-05 22:55:14,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 3774.3ms TimeCoverageRelationStatistics Valid=1158, Invalid=10614, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 22:55:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16129 states. [2021-06-05 22:55:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16129 to 8079. [2021-06-05 22:55:14,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8079 states, 8078 states have (on average 3.0300817033919287) internal successors, (24477), 8078 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8079 states to 8079 states and 24477 transitions. [2021-06-05 22:55:14,852 INFO L78 Accepts]: Start accepts. Automaton has 8079 states and 24477 transitions. Word has length 37 [2021-06-05 22:55:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:14,852 INFO L482 AbstractCegarLoop]: Abstraction has 8079 states and 24477 transitions. [2021-06-05 22:55:14,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 8079 states and 24477 transitions. [2021-06-05 22:55:14,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:14,861 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:14,861 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:15,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 22:55:15,075 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash 146836776, now seen corresponding path program 71 times [2021-06-05 22:55:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:15,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12604740] [2021-06-05 22:55:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:15,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:15,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12604740] [2021-06-05 22:55:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12604740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:15,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043150562] [2021-06-05 22:55:15,394 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:15,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:55:15,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:15,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:55:15,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:15,679 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:15,679 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 31 treesize of output 19 [2021-06-05 22:55:15,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:15,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:15,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:15,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 22:55:15,744 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:15,745 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 29 treesize of output 17 [2021-06-05 22:55:15,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:15,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:15,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:15,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:55:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:15,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043150562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:15,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:15,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2021-06-05 22:55:15,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977507841] [2021-06-05 22:55:15,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 22:55:15,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 22:55:15,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 22:55:15,901 INFO L87 Difference]: Start difference. First operand 8079 states and 24477 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:19,479 INFO L93 Difference]: Finished difference Result 13022 states and 39095 transitions. [2021-06-05 22:55:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 22:55:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:19,497 INFO L225 Difference]: With dead ends: 13022 [2021-06-05 22:55:19,497 INFO L226 Difference]: Without dead ends: 12649 [2021-06-05 22:55:19,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2322.7ms TimeCoverageRelationStatistics Valid=486, Invalid=6486, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 22:55:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12649 states. [2021-06-05 22:55:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12649 to 8061. [2021-06-05 22:55:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8061 states, 8060 states have (on average 3.036848635235732) internal successors, (24477), 8060 states have internal predecessors, (24477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:19,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8061 states to 8061 states and 24477 transitions. [2021-06-05 22:55:19,624 INFO L78 Accepts]: Start accepts. Automaton has 8061 states and 24477 transitions. Word has length 37 [2021-06-05 22:55:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:19,624 INFO L482 AbstractCegarLoop]: Abstraction has 8061 states and 24477 transitions. [2021-06-05 22:55:19,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 8061 states and 24477 transitions. [2021-06-05 22:55:19,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:19,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:19,633 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:19,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:19,848 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:19,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1505232886, now seen corresponding path program 72 times [2021-06-05 22:55:19,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:19,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883325358] [2021-06-05 22:55:19,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:20,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:20,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883325358] [2021-06-05 22:55:20,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883325358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:20,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816288524] [2021-06-05 22:55:20,225 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:20,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:55:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:55:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:20,573 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:20,573 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 31 treesize of output 19 [2021-06-05 22:55:20,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:20,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:20,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:20,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 22:55:20,687 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:20,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 22:55:20,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:20,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:20,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:20,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:55:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:20,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816288524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:20,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:20,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 35 [2021-06-05 22:55:20,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211008480] [2021-06-05 22:55:20,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:55:20,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:20,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:55:20,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:55:20,794 INFO L87 Difference]: Start difference. First operand 8061 states and 24477 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:23,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:23,827 INFO L93 Difference]: Finished difference Result 15666 states and 46528 transitions. [2021-06-05 22:55:23,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 22:55:23,827 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:23,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:23,847 INFO L225 Difference]: With dead ends: 15666 [2021-06-05 22:55:23,847 INFO L226 Difference]: Without dead ends: 15353 [2021-06-05 22:55:23,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 2596.0ms TimeCoverageRelationStatistics Valid=717, Invalid=6423, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 22:55:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15353 states. [2021-06-05 22:55:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15353 to 8111. [2021-06-05 22:55:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8111 states, 8110 states have (on average 3.0355117139334156) internal successors, (24618), 8110 states have internal predecessors, (24618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8111 states to 8111 states and 24618 transitions. [2021-06-05 22:55:23,986 INFO L78 Accepts]: Start accepts. Automaton has 8111 states and 24618 transitions. Word has length 37 [2021-06-05 22:55:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:23,986 INFO L482 AbstractCegarLoop]: Abstraction has 8111 states and 24618 transitions. [2021-06-05 22:55:23,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:23,986 INFO L276 IsEmpty]: Start isEmpty. Operand 8111 states and 24618 transitions. [2021-06-05 22:55:23,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:23,995 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:23,995 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:24,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:24,196 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:24,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 594236954, now seen corresponding path program 73 times [2021-06-05 22:55:24,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:24,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64355950] [2021-06-05 22:55:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:24,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64355950] [2021-06-05 22:55:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64355950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:24,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993112139] [2021-06-05 22:55:24,541 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:55:24,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:24,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:24,758 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 25 treesize of output 13 [2021-06-05 22:55:24,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:24,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:24,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:24,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:55:24,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:24,932 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 29 treesize of output 17 [2021-06-05 22:55:24,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:24,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:24,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:24,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:55:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:25,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993112139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:25,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:25,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258994062] [2021-06-05 22:55:25,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:25,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:25,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:25,114 INFO L87 Difference]: Start difference. First operand 8111 states and 24618 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:29,686 INFO L93 Difference]: Finished difference Result 16437 states and 48919 transitions. [2021-06-05 22:55:29,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 22:55:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:29,708 INFO L225 Difference]: With dead ends: 16437 [2021-06-05 22:55:29,708 INFO L226 Difference]: Without dead ends: 16158 [2021-06-05 22:55:29,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 3671.7ms TimeCoverageRelationStatistics Valid=1041, Invalid=9671, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 22:55:29,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2021-06-05 22:55:29,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 8329. [2021-06-05 22:55:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 8328 states have (on average 3.0345821325648417) internal successors, (25272), 8328 states have internal predecessors, (25272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 25272 transitions. [2021-06-05 22:55:29,859 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 25272 transitions. Word has length 37 [2021-06-05 22:55:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:29,859 INFO L482 AbstractCegarLoop]: Abstraction has 8329 states and 25272 transitions. [2021-06-05 22:55:29,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 25272 transitions. [2021-06-05 22:55:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:29,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:29,868 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:30,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 22:55:30,069 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2004424102, now seen corresponding path program 74 times [2021-06-05 22:55:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:30,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503398474] [2021-06-05 22:55:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:30,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:30,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503398474] [2021-06-05 22:55:30,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503398474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:30,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431488560] [2021-06-05 22:55:30,443 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:30,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:55:30,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:30,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:55:30,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:30,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:30,674 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 27 treesize of output 15 [2021-06-05 22:55:30,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:30,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:30,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:30,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:55:30,846 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:30,846 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 29 treesize of output 17 [2021-06-05 22:55:30,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:30,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:30,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:30,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:55:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:31,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431488560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:31,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:31,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:31,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276716577] [2021-06-05 22:55:31,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:31,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:31,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:31,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:31,049 INFO L87 Difference]: Start difference. First operand 8329 states and 25272 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:35,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:35,361 INFO L93 Difference]: Finished difference Result 12304 states and 36865 transitions. [2021-06-05 22:55:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 22:55:35,361 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:35,376 INFO L225 Difference]: With dead ends: 12304 [2021-06-05 22:55:35,376 INFO L226 Difference]: Without dead ends: 12020 [2021-06-05 22:55:35,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 3201.9ms TimeCoverageRelationStatistics Valid=597, Invalid=8523, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 22:55:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-06-05 22:55:35,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 8329. [2021-06-05 22:55:35,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8329 states, 8328 states have (on average 3.0355427473583094) internal successors, (25280), 8328 states have internal predecessors, (25280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8329 states to 8329 states and 25280 transitions. [2021-06-05 22:55:35,499 INFO L78 Accepts]: Start accepts. Automaton has 8329 states and 25280 transitions. Word has length 37 [2021-06-05 22:55:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:35,499 INFO L482 AbstractCegarLoop]: Abstraction has 8329 states and 25280 transitions. [2021-06-05 22:55:35,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 8329 states and 25280 transitions. [2021-06-05 22:55:35,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:35,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:35,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:35,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 22:55:35,709 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:35,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:35,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1469667314, now seen corresponding path program 75 times [2021-06-05 22:55:35,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:35,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688906062] [2021-06-05 22:55:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:36,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:36,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688906062] [2021-06-05 22:55:36,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688906062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:36,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429565595] [2021-06-05 22:55:36,071 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:36,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:55:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:55:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:36,317 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:36,317 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 27 treesize of output 15 [2021-06-05 22:55:36,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:36,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:36,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:36,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:55:36,563 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:36,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 22:55:36,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:36,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:36,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:36,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:55:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:36,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429565595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:36,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:36,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:36,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010198601] [2021-06-05 22:55:36,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:36,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:36,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:36,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:36,763 INFO L87 Difference]: Start difference. First operand 8329 states and 25280 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:40,997 INFO L93 Difference]: Finished difference Result 13628 states and 40763 transitions. [2021-06-05 22:55:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:55:40,998 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:40,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:41,016 INFO L225 Difference]: With dead ends: 13628 [2021-06-05 22:55:41,016 INFO L226 Difference]: Without dead ends: 13372 [2021-06-05 22:55:41,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 3108.7ms TimeCoverageRelationStatistics Valid=515, Invalid=7857, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 22:55:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13372 states. [2021-06-05 22:55:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13372 to 8322. [2021-06-05 22:55:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8322 states, 8321 states have (on average 3.0348515803389016) internal successors, (25253), 8321 states have internal predecessors, (25253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8322 states to 8322 states and 25253 transitions. [2021-06-05 22:55:41,145 INFO L78 Accepts]: Start accepts. Automaton has 8322 states and 25253 transitions. Word has length 37 [2021-06-05 22:55:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:41,145 INFO L482 AbstractCegarLoop]: Abstraction has 8322 states and 25253 transitions. [2021-06-05 22:55:41,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 8322 states and 25253 transitions. [2021-06-05 22:55:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:41,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:41,153 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:41,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:41,354 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash 644586826, now seen corresponding path program 76 times [2021-06-05 22:55:41,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:41,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891022515] [2021-06-05 22:55:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:41,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:41,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891022515] [2021-06-05 22:55:41,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891022515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:41,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145323227] [2021-06-05 22:55:41,730 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:41,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:55:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:41,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:55:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:41,999 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:41,999 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 27 treesize of output 15 [2021-06-05 22:55:42,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:42,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:42,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:42,008 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:55:42,234 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:42,234 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 30 treesize of output 18 [2021-06-05 22:55:42,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:42,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:42,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:42,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:55:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:42,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145323227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:42,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:42,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:42,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886809581] [2021-06-05 22:55:42,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:42,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:42,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:42,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:42,400 INFO L87 Difference]: Start difference. First operand 8322 states and 25253 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:46,290 INFO L93 Difference]: Finished difference Result 13843 states and 41442 transitions. [2021-06-05 22:55:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:55:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:46,309 INFO L225 Difference]: With dead ends: 13843 [2021-06-05 22:55:46,309 INFO L226 Difference]: Without dead ends: 13564 [2021-06-05 22:55:46,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 2831.2ms TimeCoverageRelationStatistics Valid=440, Invalid=6870, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:55:46,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13564 states. [2021-06-05 22:55:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13564 to 8332. [2021-06-05 22:55:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8331 states have (on average 3.035770015604369) internal successors, (25291), 8331 states have internal predecessors, (25291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 25291 transitions. [2021-06-05 22:55:46,442 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 25291 transitions. Word has length 37 [2021-06-05 22:55:46,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:46,442 INFO L482 AbstractCegarLoop]: Abstraction has 8332 states and 25291 transitions. [2021-06-05 22:55:46,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 25291 transitions. [2021-06-05 22:55:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:46,450 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:46,450 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:46,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 22:55:46,651 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1790118686, now seen corresponding path program 77 times [2021-06-05 22:55:46,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:46,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405311535] [2021-06-05 22:55:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:47,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:47,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405311535] [2021-06-05 22:55:47,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405311535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:47,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985063615] [2021-06-05 22:55:47,030 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:47,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:55:47,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:47,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:55:47,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:47,335 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:47,336 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 25 treesize of output 13 [2021-06-05 22:55:47,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:47,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:47,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:47,344 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:55:47,525 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:47,526 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 29 treesize of output 17 [2021-06-05 22:55:47,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:47,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:47,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:47,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:55:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:47,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985063615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:47,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:47,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:47,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573430416] [2021-06-05 22:55:47,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:47,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:47,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:47,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:47,730 INFO L87 Difference]: Start difference. First operand 8332 states and 25291 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:51,640 INFO L93 Difference]: Finished difference Result 13716 states and 41060 transitions. [2021-06-05 22:55:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:55:51,641 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:51,659 INFO L225 Difference]: With dead ends: 13716 [2021-06-05 22:55:51,659 INFO L226 Difference]: Without dead ends: 13460 [2021-06-05 22:55:51,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 2847.3ms TimeCoverageRelationStatistics Valid=470, Invalid=7186, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 22:55:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13460 states. [2021-06-05 22:55:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13460 to 8320. [2021-06-05 22:55:51,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8320 states, 8319 states have (on average 3.0360620266858995) internal successors, (25257), 8319 states have internal predecessors, (25257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8320 states to 8320 states and 25257 transitions. [2021-06-05 22:55:51,787 INFO L78 Accepts]: Start accepts. Automaton has 8320 states and 25257 transitions. Word has length 37 [2021-06-05 22:55:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:51,788 INFO L482 AbstractCegarLoop]: Abstraction has 8320 states and 25257 transitions. [2021-06-05 22:55:51,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:51,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8320 states and 25257 transitions. [2021-06-05 22:55:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:51,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:51,796 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:52,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:52,001 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:52,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:52,002 INFO L82 PathProgramCache]: Analyzing trace with hash -390594470, now seen corresponding path program 78 times [2021-06-05 22:55:52,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:52,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375809442] [2021-06-05 22:55:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:52,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:52,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375809442] [2021-06-05 22:55:52,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375809442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:52,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027824859] [2021-06-05 22:55:52,382 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:52,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:55:52,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:55:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:55:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:52,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:52,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:55:52,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:52,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:52,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:52,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:55:52,913 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:52,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 22:55:52,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:52,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:52,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:52,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:23 [2021-06-05 22:55:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:53,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027824859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:53,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:53,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:53,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666409946] [2021-06-05 22:55:53,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:53,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:53,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:53,070 INFO L87 Difference]: Start difference. First operand 8320 states and 25257 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:55:57,199 INFO L93 Difference]: Finished difference Result 14169 states and 42466 transitions. [2021-06-05 22:55:57,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 22:55:57,199 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:55:57,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:55:57,219 INFO L225 Difference]: With dead ends: 14169 [2021-06-05 22:55:57,219 INFO L226 Difference]: Without dead ends: 13893 [2021-06-05 22:55:57,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 2805.6ms TimeCoverageRelationStatistics Valid=433, Invalid=6877, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:55:57,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13893 states. [2021-06-05 22:55:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13893 to 8338. [2021-06-05 22:55:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8338 states, 8337 states have (on average 3.0361041141897567) internal successors, (25312), 8337 states have internal predecessors, (25312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8338 states to 8338 states and 25312 transitions. [2021-06-05 22:55:57,351 INFO L78 Accepts]: Start accepts. Automaton has 8338 states and 25312 transitions. Word has length 37 [2021-06-05 22:55:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:55:57,351 INFO L482 AbstractCegarLoop]: Abstraction has 8338 states and 25312 transitions. [2021-06-05 22:55:57,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:55:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 8338 states and 25312 transitions. [2021-06-05 22:55:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:55:57,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:55:57,360 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:55:57,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:57,560 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:55:57,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:55:57,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1597465620, now seen corresponding path program 79 times [2021-06-05 22:55:57,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:55:57,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656435660] [2021-06-05 22:55:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:55:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:57,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:55:57,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656435660] [2021-06-05 22:55:57,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656435660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:57,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736505396] [2021-06-05 22:55:57,917 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:55:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:55:57,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:55:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:55:58,165 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:58,165 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 25 treesize of output 13 [2021-06-05 22:55:58,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:58,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:58,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:58,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:55:58,424 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:55:58,424 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 30 treesize of output 18 [2021-06-05 22:55:58,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:55:58,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:55:58,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:55:58,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:55:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:55:58,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736505396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:55:58,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:55:58,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:55:58,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682965508] [2021-06-05 22:55:58,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:55:58,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:55:58,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:55:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:55:58,601 INFO L87 Difference]: Start difference. First operand 8338 states and 25312 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:02,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:02,120 INFO L93 Difference]: Finished difference Result 13483 states and 40301 transitions. [2021-06-05 22:56:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:56:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:02,137 INFO L225 Difference]: With dead ends: 13483 [2021-06-05 22:56:02,137 INFO L226 Difference]: Without dead ends: 13191 [2021-06-05 22:56:02,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2637.2ms TimeCoverageRelationStatistics Valid=403, Invalid=6239, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:56:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13191 states. [2021-06-05 22:56:02,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13191 to 8332. [2021-06-05 22:56:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8332 states, 8331 states have (on average 3.0367302844796544) internal successors, (25299), 8331 states have internal predecessors, (25299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8332 states to 8332 states and 25299 transitions. [2021-06-05 22:56:02,259 INFO L78 Accepts]: Start accepts. Automaton has 8332 states and 25299 transitions. Word has length 37 [2021-06-05 22:56:02,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:02,259 INFO L482 AbstractCegarLoop]: Abstraction has 8332 states and 25299 transitions. [2021-06-05 22:56:02,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:02,259 INFO L276 IsEmpty]: Start isEmpty. Operand 8332 states and 25299 transitions. [2021-06-05 22:56:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:02,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:02,267 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:02,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 22:56:02,474 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:02,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1947653718, now seen corresponding path program 80 times [2021-06-05 22:56:02,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:02,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286647519] [2021-06-05 22:56:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:02,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:02,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:02,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286647519] [2021-06-05 22:56:02,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286647519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:02,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210044632] [2021-06-05 22:56:02,787 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:02,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:56:02,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:02,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:56:02,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:03,009 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:03,009 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 27 treesize of output 15 [2021-06-05 22:56:03,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:03,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:03,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:03,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:56:03,185 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:03,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:56:03,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:03,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:03,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:03,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:03,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210044632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:03,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:03,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:56:03,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797821739] [2021-06-05 22:56:03,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:56:03,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:03,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:56:03,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:56:03,377 INFO L87 Difference]: Start difference. First operand 8332 states and 25299 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:07,141 INFO L93 Difference]: Finished difference Result 16854 states and 50179 transitions. [2021-06-05 22:56:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 22:56:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:07,166 INFO L225 Difference]: With dead ends: 16854 [2021-06-05 22:56:07,166 INFO L226 Difference]: Without dead ends: 16575 [2021-06-05 22:56:07,167 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 3039.3ms TimeCoverageRelationStatistics Valid=784, Invalid=8146, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 22:56:07,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16575 states. [2021-06-05 22:56:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16575 to 8446. [2021-06-05 22:56:07,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8446 states, 8445 states have (on average 3.0351687388987565) internal successors, (25632), 8445 states have internal predecessors, (25632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8446 states to 8446 states and 25632 transitions. [2021-06-05 22:56:07,325 INFO L78 Accepts]: Start accepts. Automaton has 8446 states and 25632 transitions. Word has length 37 [2021-06-05 22:56:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:07,325 INFO L482 AbstractCegarLoop]: Abstraction has 8446 states and 25632 transitions. [2021-06-05 22:56:07,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 8446 states and 25632 transitions. [2021-06-05 22:56:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:07,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:07,334 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:07,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 22:56:07,535 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:07,535 INFO L82 PathProgramCache]: Analyzing trace with hash -651007338, now seen corresponding path program 81 times [2021-06-05 22:56:07,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:07,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517004012] [2021-06-05 22:56:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:07,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:07,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517004012] [2021-06-05 22:56:07,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517004012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:07,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197652820] [2021-06-05 22:56:07,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:07,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:56:07,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:07,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:08,158 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:08,158 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 27 treesize of output 15 [2021-06-05 22:56:08,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:08,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:08,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:08,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:56:08,343 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:08,343 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 36 treesize of output 20 [2021-06-05 22:56:08,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:08,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:08,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:08,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:20 [2021-06-05 22:56:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:08,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197652820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:08,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:08,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:56:08,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256482169] [2021-06-05 22:56:08,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:56:08,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:08,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:56:08,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1247, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:56:08,539 INFO L87 Difference]: Start difference. First operand 8446 states and 25632 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:11,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:11,255 INFO L93 Difference]: Finished difference Result 11633 states and 34886 transitions. [2021-06-05 22:56:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 22:56:11,255 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:11,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:11,269 INFO L225 Difference]: With dead ends: 11633 [2021-06-05 22:56:11,269 INFO L226 Difference]: Without dead ends: 11318 [2021-06-05 22:56:11,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1979.3ms TimeCoverageRelationStatistics Valid=303, Invalid=4389, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 22:56:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11318 states. [2021-06-05 22:56:11,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11318 to 8409. [2021-06-05 22:56:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 8408 states have (on average 3.0388915318744054) internal successors, (25551), 8408 states have internal predecessors, (25551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:11,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 25551 transitions. [2021-06-05 22:56:11,386 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 25551 transitions. Word has length 37 [2021-06-05 22:56:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:11,386 INFO L482 AbstractCegarLoop]: Abstraction has 8409 states and 25551 transitions. [2021-06-05 22:56:11,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:11,387 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 25551 transitions. [2021-06-05 22:56:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:11,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:11,395 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:11,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:11,596 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash -2113893768, now seen corresponding path program 82 times [2021-06-05 22:56:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:11,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348644311] [2021-06-05 22:56:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:11,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:11,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348644311] [2021-06-05 22:56:11,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348644311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:11,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771232763] [2021-06-05 22:56:11,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:11,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:56:11,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:56:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:12,296 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:12,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:56:12,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:12,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:12,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:12,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:56:12,375 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:12,376 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 29 treesize of output 17 [2021-06-05 22:56:12,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:12,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:12,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:12,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:12,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771232763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:12,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:12,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 22:56:12,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528598949] [2021-06-05 22:56:12,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 22:56:12,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:12,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 22:56:12,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:56:12,563 INFO L87 Difference]: Start difference. First operand 8409 states and 25551 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:15,901 INFO L93 Difference]: Finished difference Result 13168 states and 39076 transitions. [2021-06-05 22:56:15,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 22:56:15,901 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:15,919 INFO L225 Difference]: With dead ends: 13168 [2021-06-05 22:56:15,919 INFO L226 Difference]: Without dead ends: 12986 [2021-06-05 22:56:15,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2859.7ms TimeCoverageRelationStatistics Valid=787, Invalid=7585, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 22:56:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12986 states. [2021-06-05 22:56:16,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12986 to 8519. [2021-06-05 22:56:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8519 states, 8518 states have (on average 3.0319323784926038) internal successors, (25826), 8518 states have internal predecessors, (25826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8519 states to 8519 states and 25826 transitions. [2021-06-05 22:56:16,049 INFO L78 Accepts]: Start accepts. Automaton has 8519 states and 25826 transitions. Word has length 37 [2021-06-05 22:56:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:16,049 INFO L482 AbstractCegarLoop]: Abstraction has 8519 states and 25826 transitions. [2021-06-05 22:56:16,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 8519 states and 25826 transitions. [2021-06-05 22:56:16,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:16,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:16,057 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:16,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:16,258 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:16,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:16,258 INFO L82 PathProgramCache]: Analyzing trace with hash -417587528, now seen corresponding path program 83 times [2021-06-05 22:56:16,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:16,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123409701] [2021-06-05 22:56:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:16,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:16,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123409701] [2021-06-05 22:56:16,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123409701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:16,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851810390] [2021-06-05 22:56:16,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:16,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:56:16,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 22:56:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:16,849 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:16,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2021-06-05 22:56:16,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:16,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:16,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:16,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:41 [2021-06-05 22:56:16,922 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:16,923 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 31 treesize of output 19 [2021-06-05 22:56:16,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:16,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:16,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:16,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 22:56:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:17,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851810390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:17,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:17,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 33 [2021-06-05 22:56:17,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979620833] [2021-06-05 22:56:17,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 22:56:17,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:17,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 22:56:17,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:56:17,085 INFO L87 Difference]: Start difference. First operand 8519 states and 25826 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:17,831 INFO L93 Difference]: Finished difference Result 8965 states and 27063 transitions. [2021-06-05 22:56:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 22:56:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:17,843 INFO L225 Difference]: With dead ends: 8965 [2021-06-05 22:56:17,843 INFO L226 Difference]: Without dead ends: 8764 [2021-06-05 22:56:17,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 915.8ms TimeCoverageRelationStatistics Valid=157, Invalid=1735, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 22:56:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8764 states. [2021-06-05 22:56:17,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8764 to 8450. [2021-06-05 22:56:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8450 states, 8449 states have (on average 3.037045804237188) internal successors, (25660), 8449 states have internal predecessors, (25660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8450 states to 8450 states and 25660 transitions. [2021-06-05 22:56:17,942 INFO L78 Accepts]: Start accepts. Automaton has 8450 states and 25660 transitions. Word has length 37 [2021-06-05 22:56:17,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:17,942 INFO L482 AbstractCegarLoop]: Abstraction has 8450 states and 25660 transitions. [2021-06-05 22:56:17,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:17,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8450 states and 25660 transitions. [2021-06-05 22:56:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:17,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:17,950 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:18,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:18,151 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:18,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1630842670, now seen corresponding path program 84 times [2021-06-05 22:56:18,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:18,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284239595] [2021-06-05 22:56:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:18,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:18,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284239595] [2021-06-05 22:56:18,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284239595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:18,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581340990] [2021-06-05 22:56:18,495 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:18,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:56:18,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:18,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:56:18,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:56:18,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-06-05 22:56:18,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:18,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:18,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:18,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:28 [2021-06-05 22:56:18,878 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:18,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:56:18,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:18,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:18,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:18,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:56:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:19,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581340990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:19,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:19,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:56:19,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527785525] [2021-06-05 22:56:19,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:56:19,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:19,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:56:19,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:56:19,027 INFO L87 Difference]: Start difference. First operand 8450 states and 25660 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:21,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:21,499 INFO L93 Difference]: Finished difference Result 13844 states and 40921 transitions. [2021-06-05 22:56:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:56:21,500 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:21,520 INFO L225 Difference]: With dead ends: 13844 [2021-06-05 22:56:21,520 INFO L226 Difference]: Without dead ends: 13638 [2021-06-05 22:56:21,520 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2078.9ms TimeCoverageRelationStatistics Valid=612, Invalid=5550, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 22:56:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13638 states. [2021-06-05 22:56:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13638 to 8552. [2021-06-05 22:56:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8552 states, 8551 states have (on average 3.0321599812887383) internal successors, (25928), 8551 states have internal predecessors, (25928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8552 states to 8552 states and 25928 transitions. [2021-06-05 22:56:21,655 INFO L78 Accepts]: Start accepts. Automaton has 8552 states and 25928 transitions. Word has length 37 [2021-06-05 22:56:21,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:21,655 INFO L482 AbstractCegarLoop]: Abstraction has 8552 states and 25928 transitions. [2021-06-05 22:56:21,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:21,655 INFO L276 IsEmpty]: Start isEmpty. Operand 8552 states and 25928 transitions. [2021-06-05 22:56:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:21,664 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:21,664 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:21,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:21,877 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:21,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:21,877 INFO L82 PathProgramCache]: Analyzing trace with hash -967818386, now seen corresponding path program 85 times [2021-06-05 22:56:21,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:21,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004886673] [2021-06-05 22:56:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:22,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004886673] [2021-06-05 22:56:22,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004886673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:22,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315777415] [2021-06-05 22:56:22,197 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:22,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:56:22,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:22,547 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 22:56:22,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:22,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:22,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:22,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:56:22,628 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:22,628 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 29 treesize of output 17 [2021-06-05 22:56:22,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:22,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:22,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:22,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:22,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315777415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:22,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:22,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-06-05 22:56:22,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244156728] [2021-06-05 22:56:22,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:56:22,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:56:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1179, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:56:22,839 INFO L87 Difference]: Start difference. First operand 8552 states and 25928 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:25,105 INFO L93 Difference]: Finished difference Result 9940 states and 29928 transitions. [2021-06-05 22:56:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:56:25,116 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:25,130 INFO L225 Difference]: With dead ends: 9940 [2021-06-05 22:56:25,130 INFO L226 Difference]: Without dead ends: 9708 [2021-06-05 22:56:25,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1681.4ms TimeCoverageRelationStatistics Valid=218, Invalid=3088, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:56:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9708 states. [2021-06-05 22:56:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9708 to 8492. [2021-06-05 22:56:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.035802614533035) internal successors, (25777), 8491 states have internal predecessors, (25777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 25777 transitions. [2021-06-05 22:56:25,244 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 25777 transitions. Word has length 37 [2021-06-05 22:56:25,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:25,244 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 25777 transitions. [2021-06-05 22:56:25,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:25,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 25777 transitions. [2021-06-05 22:56:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:25,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:25,253 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:25,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:25,453 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1202081642, now seen corresponding path program 86 times [2021-06-05 22:56:25,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:25,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23182404] [2021-06-05 22:56:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:25,762 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:25,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:25,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23182404] [2021-06-05 22:56:25,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23182404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:25,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236286639] [2021-06-05 22:56:25,762 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:25,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:56:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:56:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:26,009 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:26,009 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 27 treesize of output 15 [2021-06-05 22:56:26,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:26,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:26,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:26,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:56:26,227 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:26,227 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 29 treesize of output 17 [2021-06-05 22:56:26,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:26,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:26,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:26,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:26,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236286639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:26,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:26,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:56:26,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576123521] [2021-06-05 22:56:26,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:56:26,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:56:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:56:26,427 INFO L87 Difference]: Start difference. First operand 8492 states and 25777 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:30,652 INFO L93 Difference]: Finished difference Result 15143 states and 44874 transitions. [2021-06-05 22:56:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 22:56:30,652 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:30,671 INFO L225 Difference]: With dead ends: 15143 [2021-06-05 22:56:30,672 INFO L226 Difference]: Without dead ends: 14864 [2021-06-05 22:56:30,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 3132.5ms TimeCoverageRelationStatistics Valid=751, Invalid=7991, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 22:56:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14864 states. [2021-06-05 22:56:30,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14864 to 8576. [2021-06-05 22:56:30,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 8575 states have (on average 3.033586005830904) internal successors, (26013), 8575 states have internal predecessors, (26013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 26013 transitions. [2021-06-05 22:56:30,810 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 26013 transitions. Word has length 37 [2021-06-05 22:56:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:30,810 INFO L482 AbstractCegarLoop]: Abstraction has 8576 states and 26013 transitions. [2021-06-05 22:56:30,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 26013 transitions. [2021-06-05 22:56:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:30,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:30,819 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:31,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 22:56:31,019 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1396579414, now seen corresponding path program 87 times [2021-06-05 22:56:31,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:31,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811238410] [2021-06-05 22:56:31,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:31,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:31,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811238410] [2021-06-05 22:56:31,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811238410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:31,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118996754] [2021-06-05 22:56:31,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:31,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:56:31,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:31,602 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:31,602 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 31 treesize of output 19 [2021-06-05 22:56:31,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:31,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:31,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:31,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 22:56:31,794 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:31,794 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 43 treesize of output 23 [2021-06-05 22:56:31,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:31,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:31,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:31,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:56:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:32,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118996754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:32,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:32,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:56:32,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8052306] [2021-06-05 22:56:32,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:56:32,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:32,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:56:32,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:56:32,003 INFO L87 Difference]: Start difference. First operand 8576 states and 26013 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:34,213 INFO L93 Difference]: Finished difference Result 9895 states and 29814 transitions. [2021-06-05 22:56:34,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:56:34,213 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:34,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:34,226 INFO L225 Difference]: With dead ends: 9895 [2021-06-05 22:56:34,226 INFO L226 Difference]: Without dead ends: 9666 [2021-06-05 22:56:34,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1647.1ms TimeCoverageRelationStatistics Valid=212, Invalid=3094, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:56:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2021-06-05 22:56:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 8549. [2021-06-05 22:56:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8549 states, 8548 states have (on average 3.0354468881609735) internal successors, (25947), 8548 states have internal predecessors, (25947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8549 states to 8549 states and 25947 transitions. [2021-06-05 22:56:34,335 INFO L78 Accepts]: Start accepts. Automaton has 8549 states and 25947 transitions. Word has length 37 [2021-06-05 22:56:34,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:34,335 INFO L482 AbstractCegarLoop]: Abstraction has 8549 states and 25947 transitions. [2021-06-05 22:56:34,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:34,335 INFO L276 IsEmpty]: Start isEmpty. Operand 8549 states and 25947 transitions. [2021-06-05 22:56:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:34,344 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:34,344 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:34,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 22:56:34,545 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1739468890, now seen corresponding path program 88 times [2021-06-05 22:56:34,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:34,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21819523] [2021-06-05 22:56:34,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:34,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:34,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21819523] [2021-06-05 22:56:34,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21819523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:34,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243294784] [2021-06-05 22:56:34,864 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:34,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:56:34,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:34,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:34,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:35,130 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:56:35,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 22:56:35,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:35,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:35,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:35,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:32 [2021-06-05 22:56:35,322 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:35,323 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 29 treesize of output 17 [2021-06-05 22:56:35,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:35,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:35,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:35,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:35,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243294784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:35,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:35,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:56:35,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317792056] [2021-06-05 22:56:35,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:56:35,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:56:35,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:56:35,525 INFO L87 Difference]: Start difference. First operand 8549 states and 25947 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:38,874 INFO L93 Difference]: Finished difference Result 12814 states and 38064 transitions. [2021-06-05 22:56:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:56:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:38,892 INFO L225 Difference]: With dead ends: 12814 [2021-06-05 22:56:38,892 INFO L226 Difference]: Without dead ends: 12632 [2021-06-05 22:56:38,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 2564.1ms TimeCoverageRelationStatistics Valid=539, Invalid=6103, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:56:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12632 states. [2021-06-05 22:56:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12632 to 8624. [2021-06-05 22:56:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 8623 states have (on average 3.0339788936565) internal successors, (26162), 8623 states have internal predecessors, (26162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:39,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 26162 transitions. [2021-06-05 22:56:39,042 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 26162 transitions. Word has length 37 [2021-06-05 22:56:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:39,042 INFO L482 AbstractCegarLoop]: Abstraction has 8624 states and 26162 transitions. [2021-06-05 22:56:39,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 26162 transitions. [2021-06-05 22:56:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:39,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:39,051 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:39,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:39,251 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:39,252 INFO L82 PathProgramCache]: Analyzing trace with hash -43162650, now seen corresponding path program 89 times [2021-06-05 22:56:39,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:39,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741497584] [2021-06-05 22:56:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:39,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:39,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741497584] [2021-06-05 22:56:39,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741497584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:39,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588474901] [2021-06-05 22:56:39,563 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:39,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:56:39,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:39,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:56:39,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:39,809 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:39,809 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 38 treesize of output 22 [2021-06-05 22:56:39,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:39,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:39,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:39,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:27 [2021-06-05 22:56:39,913 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:39,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:56:39,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:39,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:39,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:39,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-06-05 22:56:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:40,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588474901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:40,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:40,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:56:40,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118444215] [2021-06-05 22:56:40,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:56:40,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:56:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:56:40,085 INFO L87 Difference]: Start difference. First operand 8624 states and 26162 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:41,694 INFO L93 Difference]: Finished difference Result 10198 states and 30751 transitions. [2021-06-05 22:56:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 22:56:41,695 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:41,707 INFO L225 Difference]: With dead ends: 10198 [2021-06-05 22:56:41,708 INFO L226 Difference]: Without dead ends: 9953 [2021-06-05 22:56:41,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1224.9ms TimeCoverageRelationStatistics Valid=195, Invalid=2457, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:56:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9953 states. [2021-06-05 22:56:41,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9953 to 8534. [2021-06-05 22:56:41,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8534 states, 8533 states have (on average 3.0375014649009726) internal successors, (25919), 8533 states have internal predecessors, (25919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8534 states to 8534 states and 25919 transitions. [2021-06-05 22:56:41,839 INFO L78 Accepts]: Start accepts. Automaton has 8534 states and 25919 transitions. Word has length 37 [2021-06-05 22:56:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:41,839 INFO L482 AbstractCegarLoop]: Abstraction has 8534 states and 25919 transitions. [2021-06-05 22:56:41,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 8534 states and 25919 transitions. [2021-06-05 22:56:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:41,848 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:41,848 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:42,061 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash 739816670, now seen corresponding path program 90 times [2021-06-05 22:56:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:42,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278587426] [2021-06-05 22:56:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:42,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:42,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:42,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278587426] [2021-06-05 22:56:42,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278587426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:42,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874185091] [2021-06-05 22:56:42,427 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:42,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:56:42,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:42,694 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:42,694 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 31 treesize of output 19 [2021-06-05 22:56:42,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:42,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:42,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:42,701 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:28 [2021-06-05 22:56:42,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:42,758 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 29 treesize of output 17 [2021-06-05 22:56:42,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:42,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:42,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:42,764 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:56:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:42,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874185091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:42,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:42,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 34 [2021-06-05 22:56:42,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884068334] [2021-06-05 22:56:42,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:56:42,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:42,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:56:42,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:56:42,846 INFO L87 Difference]: Start difference. First operand 8534 states and 25919 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:44,662 INFO L93 Difference]: Finished difference Result 12951 states and 38342 transitions. [2021-06-05 22:56:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 22:56:44,663 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:44,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:44,680 INFO L225 Difference]: With dead ends: 12951 [2021-06-05 22:56:44,680 INFO L226 Difference]: Without dead ends: 12674 [2021-06-05 22:56:44,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1681.1ms TimeCoverageRelationStatistics Valid=500, Invalid=4330, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 22:56:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12674 states. [2021-06-05 22:56:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12674 to 8696. [2021-06-05 22:56:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8696 states, 8695 states have (on average 3.0357676825761932) internal successors, (26396), 8695 states have internal predecessors, (26396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8696 states to 8696 states and 26396 transitions. [2021-06-05 22:56:44,829 INFO L78 Accepts]: Start accepts. Automaton has 8696 states and 26396 transitions. Word has length 37 [2021-06-05 22:56:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:44,830 INFO L482 AbstractCegarLoop]: Abstraction has 8696 states and 26396 transitions. [2021-06-05 22:56:44,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 8696 states and 26396 transitions. [2021-06-05 22:56:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:44,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:44,838 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:45,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:45,039 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:45,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:45,039 INFO L82 PathProgramCache]: Analyzing trace with hash 311055642, now seen corresponding path program 91 times [2021-06-05 22:56:45,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:45,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664508455] [2021-06-05 22:56:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:45,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:45,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664508455] [2021-06-05 22:56:45,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664508455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:45,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630547967] [2021-06-05 22:56:45,399 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:45,639 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:56:45,640 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 29 treesize of output 13 [2021-06-05 22:56:45,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:45,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:45,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:45,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 22:56:45,818 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:45,818 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 29 treesize of output 17 [2021-06-05 22:56:45,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:45,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:45,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:45,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:46,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630547967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:46,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:46,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:56:46,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140129063] [2021-06-05 22:56:46,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:56:46,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:56:46,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:56:46,004 INFO L87 Difference]: Start difference. First operand 8696 states and 26396 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:49,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:49,663 INFO L93 Difference]: Finished difference Result 13049 states and 38753 transitions. [2021-06-05 22:56:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 22:56:49,663 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:49,680 INFO L225 Difference]: With dead ends: 13049 [2021-06-05 22:56:49,681 INFO L226 Difference]: Without dead ends: 12867 [2021-06-05 22:56:49,681 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 2566.9ms TimeCoverageRelationStatistics Valid=664, Invalid=6476, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 22:56:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12867 states. [2021-06-05 22:56:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12867 to 8774. [2021-06-05 22:56:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8774 states, 8773 states have (on average 3.033853869827881) internal successors, (26616), 8773 states have internal predecessors, (26616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:49,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8774 states to 8774 states and 26616 transitions. [2021-06-05 22:56:49,810 INFO L78 Accepts]: Start accepts. Automaton has 8774 states and 26616 transitions. Word has length 37 [2021-06-05 22:56:49,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:49,811 INFO L482 AbstractCegarLoop]: Abstraction has 8774 states and 26616 transitions. [2021-06-05 22:56:49,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:49,811 INFO L276 IsEmpty]: Start isEmpty. Operand 8774 states and 26616 transitions. [2021-06-05 22:56:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:49,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:49,820 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:50,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:50,020 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:50,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2007361882, now seen corresponding path program 92 times [2021-06-05 22:56:50,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:50,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156344045] [2021-06-05 22:56:50,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:50,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156344045] [2021-06-05 22:56:50,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156344045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144056289] [2021-06-05 22:56:50,370 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:50,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:56:50,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:50,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:50,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:50,614 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:50,614 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 38 treesize of output 22 [2021-06-05 22:56:50,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:50,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:50,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:50,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:33 [2021-06-05 22:56:50,720 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:50,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 22:56:50,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:50,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:50,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:50,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 22:56:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:50,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144056289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:50,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:50,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:56:50,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032494577] [2021-06-05 22:56:50,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:56:50,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:50,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:56:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:56:50,899 INFO L87 Difference]: Start difference. First operand 8774 states and 26616 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:52,486 INFO L93 Difference]: Finished difference Result 10209 states and 30738 transitions. [2021-06-05 22:56:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 22:56:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:52,500 INFO L225 Difference]: With dead ends: 10209 [2021-06-05 22:56:52,500 INFO L226 Difference]: Without dead ends: 9998 [2021-06-05 22:56:52,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1281.0ms TimeCoverageRelationStatistics Valid=201, Invalid=2451, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 22:56:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9998 states. [2021-06-05 22:56:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9998 to 8843. [2021-06-05 22:56:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 8842 states have (on average 3.033476589007012) internal successors, (26822), 8842 states have internal predecessors, (26822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 26822 transitions. [2021-06-05 22:56:52,613 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 26822 transitions. Word has length 37 [2021-06-05 22:56:52,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:52,613 INFO L482 AbstractCegarLoop]: Abstraction has 8843 states and 26822 transitions. [2021-06-05 22:56:52,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 26822 transitions. [2021-06-05 22:56:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:52,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:52,622 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:52,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 22:56:52,822 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1433308364, now seen corresponding path program 93 times [2021-06-05 22:56:52,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:52,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514565569] [2021-06-05 22:56:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:53,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:53,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514565569] [2021-06-05 22:56:53,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514565569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:53,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046519528] [2021-06-05 22:56:53,174 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:53,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:56:53,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:53,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:56:53,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:53,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:53,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:56:53,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:53,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:53,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:53,426 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:56:53,608 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:53,608 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 29 treesize of output 17 [2021-06-05 22:56:53,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:53,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:53,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:53,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:53,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046519528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:53,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:53,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:56:53,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312485998] [2021-06-05 22:56:53,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:56:53,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:56:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:56:53,798 INFO L87 Difference]: Start difference. First operand 8843 states and 26822 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:57,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:56:57,198 INFO L93 Difference]: Finished difference Result 13498 states and 40126 transitions. [2021-06-05 22:56:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 22:56:57,198 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:56:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:56:57,217 INFO L225 Difference]: With dead ends: 13498 [2021-06-05 22:56:57,218 INFO L226 Difference]: Without dead ends: 13328 [2021-06-05 22:56:57,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 2707.4ms TimeCoverageRelationStatistics Valid=650, Invalid=6660, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:56:57,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13328 states. [2021-06-05 22:56:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13328 to 8822. [2021-06-05 22:56:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 3.033556286135359) internal successors, (26759), 8821 states have internal predecessors, (26759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 26759 transitions. [2021-06-05 22:56:57,369 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 26759 transitions. Word has length 37 [2021-06-05 22:56:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:56:57,369 INFO L482 AbstractCegarLoop]: Abstraction has 8822 states and 26759 transitions. [2021-06-05 22:56:57,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:56:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 26759 transitions. [2021-06-05 22:56:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:56:57,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:56:57,378 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:56:57,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 22:56:57,579 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:56:57,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:56:57,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1826477636, now seen corresponding path program 94 times [2021-06-05 22:56:57,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:56:57,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981819300] [2021-06-05 22:56:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:56:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:56:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:57,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:56:57,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981819300] [2021-06-05 22:56:57,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981819300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:57,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126894269] [2021-06-05 22:56:57,947 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:56:57,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:56:57,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:56:57,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:56:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:56:58,193 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:56:58,194 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 29 treesize of output 13 [2021-06-05 22:56:58,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:58,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:58,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:58,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 22:56:58,378 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:56:58,378 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 29 treesize of output 17 [2021-06-05 22:56:58,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:56:58,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:56:58,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:56:58,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:56:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:56:58,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126894269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:56:58,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:56:58,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:56:58,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830000190] [2021-06-05 22:56:58,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:56:58,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:56:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:56:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:56:58,569 INFO L87 Difference]: Start difference. First operand 8822 states and 26759 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:01,753 INFO L93 Difference]: Finished difference Result 13664 states and 40658 transitions. [2021-06-05 22:57:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 22:57:01,753 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:01,771 INFO L225 Difference]: With dead ends: 13664 [2021-06-05 22:57:01,771 INFO L226 Difference]: Without dead ends: 13491 [2021-06-05 22:57:01,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 2430.7ms TimeCoverageRelationStatistics Valid=554, Invalid=6088, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:57:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13491 states. [2021-06-05 22:57:01,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13491 to 8717. [2021-06-05 22:57:01,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8717 states, 8716 states have (on average 3.0353373106929786) internal successors, (26456), 8716 states have internal predecessors, (26456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8717 states to 8717 states and 26456 transitions. [2021-06-05 22:57:01,902 INFO L78 Accepts]: Start accepts. Automaton has 8717 states and 26456 transitions. Word has length 37 [2021-06-05 22:57:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:01,902 INFO L482 AbstractCegarLoop]: Abstraction has 8717 states and 26456 transitions. [2021-06-05 22:57:01,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8717 states and 26456 transitions. [2021-06-05 22:57:01,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:01,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:01,911 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:02,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:02,111 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:02,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:02,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1664472406, now seen corresponding path program 95 times [2021-06-05 22:57:02,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:02,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761617448] [2021-06-05 22:57:02,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:02,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:02,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761617448] [2021-06-05 22:57:02,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761617448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:02,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983998994] [2021-06-05 22:57:02,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:02,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:57:02,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:02,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:57:02,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:57:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:57:02,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:57:02,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:57:02,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:57:02,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:02,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:02,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:02,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:32 [2021-06-05 22:57:02,971 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:02,972 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 29 treesize of output 17 [2021-06-05 22:57:02,973 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:02,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:02,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:02,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:03,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983998994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:03,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:03,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:57:03,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049987753] [2021-06-05 22:57:03,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:57:03,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:03,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:57:03,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:57:03,175 INFO L87 Difference]: Start difference. First operand 8717 states and 26456 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:06,578 INFO L93 Difference]: Finished difference Result 13319 states and 39727 transitions. [2021-06-05 22:57:06,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:57:06,578 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:06,597 INFO L225 Difference]: With dead ends: 13319 [2021-06-05 22:57:06,597 INFO L226 Difference]: Without dead ends: 13137 [2021-06-05 22:57:06,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 2433.3ms TimeCoverageRelationStatistics Valid=536, Invalid=6106, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:57:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13137 states. [2021-06-05 22:57:06,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13137 to 8772. [2021-06-05 22:57:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8772 states, 8771 states have (on average 3.033405540987345) internal successors, (26606), 8771 states have internal predecessors, (26606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8772 states to 8772 states and 26606 transitions. [2021-06-05 22:57:06,751 INFO L78 Accepts]: Start accepts. Automaton has 8772 states and 26606 transitions. Word has length 37 [2021-06-05 22:57:06,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:06,751 INFO L482 AbstractCegarLoop]: Abstraction has 8772 states and 26606 transitions. [2021-06-05 22:57:06,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 8772 states and 26606 transitions. [2021-06-05 22:57:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:06,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:06,760 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:06,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 22:57:06,960 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:06,961 INFO L82 PathProgramCache]: Analyzing trace with hash -934188650, now seen corresponding path program 96 times [2021-06-05 22:57:06,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:06,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093339644] [2021-06-05 22:57:06,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:07,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093339644] [2021-06-05 22:57:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093339644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467751409] [2021-06-05 22:57:07,289 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:07,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:57:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:07,549 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:07,549 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 31 treesize of output 19 [2021-06-05 22:57:07,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:07,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:07,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:07,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 22:57:07,754 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:07,754 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 43 treesize of output 23 [2021-06-05 22:57:07,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:07,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:07,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:07,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:57:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:07,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467751409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:07,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:07,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:57:07,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475152375] [2021-06-05 22:57:07,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:57:07,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:07,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:57:07,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:57:07,965 INFO L87 Difference]: Start difference. First operand 8772 states and 26606 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:10,643 INFO L93 Difference]: Finished difference Result 10119 states and 30529 transitions. [2021-06-05 22:57:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:57:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:10,657 INFO L225 Difference]: With dead ends: 10119 [2021-06-05 22:57:10,657 INFO L226 Difference]: Without dead ends: 9895 [2021-06-05 22:57:10,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1784.1ms TimeCoverageRelationStatistics Valid=236, Invalid=3424, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:57:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2021-06-05 22:57:10,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 8730. [2021-06-05 22:57:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8730 states, 8729 states have (on average 3.0362011685187307) internal successors, (26503), 8729 states have internal predecessors, (26503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8730 states to 8730 states and 26503 transitions. [2021-06-05 22:57:10,766 INFO L78 Accepts]: Start accepts. Automaton has 8730 states and 26503 transitions. Word has length 37 [2021-06-05 22:57:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:10,766 INFO L482 AbstractCegarLoop]: Abstraction has 8730 states and 26503 transitions. [2021-06-05 22:57:10,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 8730 states and 26503 transitions. [2021-06-05 22:57:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:10,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:10,775 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:10,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:10,976 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:10,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2051432632, now seen corresponding path program 97 times [2021-06-05 22:57:10,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:10,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181834072] [2021-06-05 22:57:10,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:11,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:11,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181834072] [2021-06-05 22:57:11,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181834072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:11,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022396486] [2021-06-05 22:57:11,316 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:11,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:11,528 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:57:11,528 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 31 treesize of output 15 [2021-06-05 22:57:11,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:11,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:11,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:11,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 22:57:11,732 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:11,732 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 29 treesize of output 17 [2021-06-05 22:57:11,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:11,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:11,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:11,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022396486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:11,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:11,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:57:11,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226458447] [2021-06-05 22:57:11,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:57:11,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:11,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:57:11,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:57:11,916 INFO L87 Difference]: Start difference. First operand 8730 states and 26503 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:15,040 INFO L93 Difference]: Finished difference Result 13225 states and 39211 transitions. [2021-06-05 22:57:15,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:57:15,041 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:15,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:15,059 INFO L225 Difference]: With dead ends: 13225 [2021-06-05 22:57:15,059 INFO L226 Difference]: Without dead ends: 13043 [2021-06-05 22:57:15,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2486.4ms TimeCoverageRelationStatistics Valid=645, Invalid=6327, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 22:57:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13043 states. [2021-06-05 22:57:15,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13043 to 8868. [2021-06-05 22:57:15,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8868 states, 8867 states have (on average 3.0340588699672946) internal successors, (26903), 8867 states have internal predecessors, (26903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8868 states to 8868 states and 26903 transitions. [2021-06-05 22:57:15,195 INFO L78 Accepts]: Start accepts. Automaton has 8868 states and 26903 transitions. Word has length 37 [2021-06-05 22:57:15,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:15,196 INFO L482 AbstractCegarLoop]: Abstraction has 8868 states and 26903 transitions. [2021-06-05 22:57:15,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:15,196 INFO L276 IsEmpty]: Start isEmpty. Operand 8868 states and 26903 transitions. [2021-06-05 22:57:15,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:15,205 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:15,205 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:15,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:15,407 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:15,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:15,407 INFO L82 PathProgramCache]: Analyzing trace with hash -547228424, now seen corresponding path program 98 times [2021-06-05 22:57:15,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:15,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608068123] [2021-06-05 22:57:15,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:15,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:15,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:15,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608068123] [2021-06-05 22:57:15,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608068123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:15,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109762413] [2021-06-05 22:57:15,736 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:15,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:15,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:15,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:57:15,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:15,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:15,951 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 27 treesize of output 15 [2021-06-05 22:57:15,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:15,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:15,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:15,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:57:16,205 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:16,205 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 29 treesize of output 17 [2021-06-05 22:57:16,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:16,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:16,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:16,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:16,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109762413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:16,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:16,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:57:16,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592851351] [2021-06-05 22:57:16,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:57:16,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:16,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:57:16,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:57:16,435 INFO L87 Difference]: Start difference. First operand 8868 states and 26903 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:19,068 INFO L93 Difference]: Finished difference Result 9926 states and 29891 transitions. [2021-06-05 22:57:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 22:57:19,069 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:19,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:19,082 INFO L225 Difference]: With dead ends: 9926 [2021-06-05 22:57:19,082 INFO L226 Difference]: Without dead ends: 9723 [2021-06-05 22:57:19,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2068.9ms TimeCoverageRelationStatistics Valid=282, Invalid=3878, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 22:57:19,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9723 states. [2021-06-05 22:57:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9723 to 8853. [2021-06-05 22:57:19,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8853 states, 8852 states have (on average 3.0353592408495254) internal successors, (26869), 8852 states have internal predecessors, (26869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 26869 transitions. [2021-06-05 22:57:19,219 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 26869 transitions. Word has length 37 [2021-06-05 22:57:19,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:19,219 INFO L482 AbstractCegarLoop]: Abstraction has 8853 states and 26869 transitions. [2021-06-05 22:57:19,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:19,219 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 26869 transitions. [2021-06-05 22:57:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:19,228 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:19,228 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:19,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 22:57:19,429 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 307068626, now seen corresponding path program 99 times [2021-06-05 22:57:19,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:19,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897995637] [2021-06-05 22:57:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:19,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:19,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897995637] [2021-06-05 22:57:19,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897995637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:19,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873663098] [2021-06-05 22:57:19,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:19,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:57:19,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:19,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:57:19,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:19,983 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:19,983 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 27 treesize of output 15 [2021-06-05 22:57:19,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:19,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:19,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:19,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:57:20,196 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:20,196 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 29 treesize of output 17 [2021-06-05 22:57:20,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:20,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:20,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:20,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:20,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873663098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:20,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:20,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:57:20,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37190854] [2021-06-05 22:57:20,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:57:20,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:20,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:57:20,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:57:20,385 INFO L87 Difference]: Start difference. First operand 8853 states and 26869 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:23,704 INFO L93 Difference]: Finished difference Result 13518 states and 40103 transitions. [2021-06-05 22:57:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 22:57:23,704 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:23,722 INFO L225 Difference]: With dead ends: 13518 [2021-06-05 22:57:23,722 INFO L226 Difference]: Without dead ends: 13336 [2021-06-05 22:57:23,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1782 ImplicationChecksByTransitivity, 2632.0ms TimeCoverageRelationStatistics Valid=633, Invalid=6507, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 22:57:23,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13336 states. [2021-06-05 22:57:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13336 to 8853. [2021-06-05 22:57:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8853 states, 8852 states have (on average 3.033890646181654) internal successors, (26856), 8852 states have internal predecessors, (26856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8853 states to 8853 states and 26856 transitions. [2021-06-05 22:57:23,855 INFO L78 Accepts]: Start accepts. Automaton has 8853 states and 26856 transitions. Word has length 37 [2021-06-05 22:57:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:23,855 INFO L482 AbstractCegarLoop]: Abstraction has 8853 states and 26856 transitions. [2021-06-05 22:57:23,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 8853 states and 26856 transitions. [2021-06-05 22:57:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:23,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:23,865 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:24,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:24,065 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:24,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2003374866, now seen corresponding path program 100 times [2021-06-05 22:57:24,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:24,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380923476] [2021-06-05 22:57:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:24,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:24,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380923476] [2021-06-05 22:57:24,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380923476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:24,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695723707] [2021-06-05 22:57:24,369 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:24,396 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:24,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:24,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:24,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:24,586 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:57:24,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 22:57:24,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:24,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:24,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:24,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:22 [2021-06-05 22:57:24,862 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:24,862 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 29 treesize of output 17 [2021-06-05 22:57:24,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:24,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:24,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:24,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:25,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695723707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:25,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:25,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:57:25,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530013049] [2021-06-05 22:57:25,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:57:25,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:57:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:57:25,085 INFO L87 Difference]: Start difference. First operand 8853 states and 26856 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:27,468 INFO L93 Difference]: Finished difference Result 10082 states and 30409 transitions. [2021-06-05 22:57:27,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:57:27,468 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:27,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:27,481 INFO L225 Difference]: With dead ends: 10082 [2021-06-05 22:57:27,481 INFO L226 Difference]: Without dead ends: 9918 [2021-06-05 22:57:27,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1792.6ms TimeCoverageRelationStatistics Valid=219, Invalid=3321, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 22:57:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9918 states. [2021-06-05 22:57:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9918 to 8847. [2021-06-05 22:57:27,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8846 states have (on average 3.034139724169116) internal successors, (26840), 8846 states have internal predecessors, (26840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 26840 transitions. [2021-06-05 22:57:27,596 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 26840 transitions. Word has length 37 [2021-06-05 22:57:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:27,596 INFO L482 AbstractCegarLoop]: Abstraction has 8847 states and 26840 transitions. [2021-06-05 22:57:27,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 26840 transitions. [2021-06-05 22:57:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:27,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:27,606 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:27,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 22:57:27,822 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:27,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:27,822 INFO L82 PathProgramCache]: Analyzing trace with hash -177338290, now seen corresponding path program 101 times [2021-06-05 22:57:27,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:27,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782098488] [2021-06-05 22:57:27,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:28,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:28,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782098488] [2021-06-05 22:57:28,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782098488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:28,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509969943] [2021-06-05 22:57:28,127 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:28,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:57:28,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:28,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:28,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:28,334 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 27 treesize of output 15 [2021-06-05 22:57:28,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:28,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:28,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:28,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:57:28,505 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:28,505 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 32 treesize of output 20 [2021-06-05 22:57:28,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:28,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:28,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:28,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:20 [2021-06-05 22:57:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:28,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509969943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:28,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:28,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:57:28,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212788245] [2021-06-05 22:57:28,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:57:28,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:28,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:57:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:57:28,695 INFO L87 Difference]: Start difference. First operand 8847 states and 26840 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:30,618 INFO L93 Difference]: Finished difference Result 10413 states and 31212 transitions. [2021-06-05 22:57:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:57:30,619 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:30,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:30,632 INFO L225 Difference]: With dead ends: 10413 [2021-06-05 22:57:30,632 INFO L226 Difference]: Without dead ends: 10166 [2021-06-05 22:57:30,633 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1502.4ms TimeCoverageRelationStatistics Valid=257, Invalid=3049, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 22:57:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10166 states. [2021-06-05 22:57:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10166 to 8964. [2021-06-05 22:57:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8964 states, 8963 states have (on average 3.0329130871360035) internal successors, (27184), 8963 states have internal predecessors, (27184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8964 states to 8964 states and 27184 transitions. [2021-06-05 22:57:30,746 INFO L78 Accepts]: Start accepts. Automaton has 8964 states and 27184 transitions. Word has length 37 [2021-06-05 22:57:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:30,746 INFO L482 AbstractCegarLoop]: Abstraction has 8964 states and 27184 transitions. [2021-06-05 22:57:30,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8964 states and 27184 transitions. [2021-06-05 22:57:30,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:30,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:30,755 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:30,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:30,956 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:30,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:30,956 INFO L82 PathProgramCache]: Analyzing trace with hash -728112670, now seen corresponding path program 102 times [2021-06-05 22:57:30,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:30,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234430719] [2021-06-05 22:57:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:31,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:31,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234430719] [2021-06-05 22:57:31,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234430719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:31,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814022438] [2021-06-05 22:57:31,290 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:31,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:57:31,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:31,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:31,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:31,539 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 27 treesize of output 15 [2021-06-05 22:57:31,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:31,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:31,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:31,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:57:31,753 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:31,753 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 38 treesize of output 22 [2021-06-05 22:57:31,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:31,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:31,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:31,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:57:31,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:31,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814022438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:31,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:31,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:57:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298170] [2021-06-05 22:57:31,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:57:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:31,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:57:31,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:57:31,925 INFO L87 Difference]: Start difference. First operand 8964 states and 27184 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:34,867 INFO L93 Difference]: Finished difference Result 13768 states and 40896 transitions. [2021-06-05 22:57:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 22:57:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:34,884 INFO L225 Difference]: With dead ends: 13768 [2021-06-05 22:57:34,884 INFO L226 Difference]: Without dead ends: 13595 [2021-06-05 22:57:34,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 2361.3ms TimeCoverageRelationStatistics Valid=539, Invalid=5941, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 22:57:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13595 states. [2021-06-05 22:57:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13595 to 8960. [2021-06-05 22:57:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8960 states, 8959 states have (on average 3.034936934925773) internal successors, (27190), 8959 states have internal predecessors, (27190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8960 states to 8960 states and 27190 transitions. [2021-06-05 22:57:35,010 INFO L78 Accepts]: Start accepts. Automaton has 8960 states and 27190 transitions. Word has length 37 [2021-06-05 22:57:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:35,010 INFO L482 AbstractCegarLoop]: Abstraction has 8960 states and 27190 transitions. [2021-06-05 22:57:35,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 8960 states and 27190 transitions. [2021-06-05 22:57:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:35,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:35,019 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:35,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:35,219 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash -890117900, now seen corresponding path program 103 times [2021-06-05 22:57:35,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:35,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455450666] [2021-06-05 22:57:35,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:35,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:35,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455450666] [2021-06-05 22:57:35,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455450666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:35,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817958988] [2021-06-05 22:57:35,553 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:35,766 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 22:57:35,766 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 31 treesize of output 15 [2021-06-05 22:57:35,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:35,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:35,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:35,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 22:57:35,983 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:35,984 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 29 treesize of output 17 [2021-06-05 22:57:35,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:35,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:35,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:35,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:36,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817958988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:36,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:36,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:57:36,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350591787] [2021-06-05 22:57:36,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:57:36,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:57:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:57:36,173 INFO L87 Difference]: Start difference. First operand 8960 states and 27190 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:39,325 INFO L93 Difference]: Finished difference Result 13626 states and 40559 transitions. [2021-06-05 22:57:39,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 22:57:39,325 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:39,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:39,343 INFO L225 Difference]: With dead ends: 13626 [2021-06-05 22:57:39,344 INFO L226 Difference]: Without dead ends: 13444 [2021-06-05 22:57:39,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 2244.2ms TimeCoverageRelationStatistics Valid=506, Invalid=5814, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:57:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13444 states. [2021-06-05 22:57:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13444 to 9008. [2021-06-05 22:57:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9008 states, 9007 states have (on average 3.033085378039303) internal successors, (27319), 9007 states have internal predecessors, (27319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:39,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9008 states to 9008 states and 27319 transitions. [2021-06-05 22:57:39,483 INFO L78 Accepts]: Start accepts. Automaton has 9008 states and 27319 transitions. Word has length 37 [2021-06-05 22:57:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:39,483 INFO L482 AbstractCegarLoop]: Abstraction has 9008 states and 27319 transitions. [2021-06-05 22:57:39,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9008 states and 27319 transitions. [2021-06-05 22:57:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:39,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:39,492 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:39,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:39,692 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:39,693 INFO L82 PathProgramCache]: Analyzing trace with hash 806188340, now seen corresponding path program 104 times [2021-06-05 22:57:39,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:39,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643929145] [2021-06-05 22:57:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:39,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:39,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643929145] [2021-06-05 22:57:39,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643929145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:39,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224930278] [2021-06-05 22:57:39,985 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:40,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:57:40,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:40,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:57:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:40,196 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:40,196 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 25 treesize of output 13 [2021-06-05 22:57:40,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:40,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:40,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:40,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 22:57:40,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:40,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:57:40,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:40,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:40,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:40,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:40,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224930278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:40,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:40,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:57:40,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576852163] [2021-06-05 22:57:40,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:57:40,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:57:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1252, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:57:40,635 INFO L87 Difference]: Start difference. First operand 9008 states and 27319 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:43,120 INFO L93 Difference]: Finished difference Result 10258 states and 30957 transitions. [2021-06-05 22:57:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:57:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:43,133 INFO L225 Difference]: With dead ends: 10258 [2021-06-05 22:57:43,133 INFO L226 Difference]: Without dead ends: 10094 [2021-06-05 22:57:43,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1669.1ms TimeCoverageRelationStatistics Valid=221, Invalid=3201, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:57:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2021-06-05 22:57:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 8984. [2021-06-05 22:57:43,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8984 states, 8983 states have (on average 3.0332850940665703) internal successors, (27248), 8983 states have internal predecessors, (27248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8984 states to 8984 states and 27248 transitions. [2021-06-05 22:57:43,244 INFO L78 Accepts]: Start accepts. Automaton has 8984 states and 27248 transitions. Word has length 37 [2021-06-05 22:57:43,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:43,244 INFO L482 AbstractCegarLoop]: Abstraction has 8984 states and 27248 transitions. [2021-06-05 22:57:43,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:43,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8984 states and 27248 transitions. [2021-06-05 22:57:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:43,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:43,253 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:43,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:43,453 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1374524816, now seen corresponding path program 105 times [2021-06-05 22:57:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:43,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814537921] [2021-06-05 22:57:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:43,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:43,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814537921] [2021-06-05 22:57:43,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814537921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:43,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415786054] [2021-06-05 22:57:43,753 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:43,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:57:43,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:43,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:44,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:44,005 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 27 treesize of output 15 [2021-06-05 22:57:44,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:44,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:44,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:44,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:57:44,283 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:44,284 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 21 [2021-06-05 22:57:44,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:44,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:44,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:44,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:25 [2021-06-05 22:57:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:44,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415786054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:44,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:44,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:57:44,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475084480] [2021-06-05 22:57:44,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:57:44,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:44,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:57:44,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:57:44,456 INFO L87 Difference]: Start difference. First operand 8984 states and 27248 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:47,237 INFO L93 Difference]: Finished difference Result 10414 states and 31457 transitions. [2021-06-05 22:57:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:57:47,237 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:47,250 INFO L225 Difference]: With dead ends: 10414 [2021-06-05 22:57:47,250 INFO L226 Difference]: Without dead ends: 10169 [2021-06-05 22:57:47,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1935.0ms TimeCoverageRelationStatistics Valid=256, Invalid=3650, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:57:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10169 states. [2021-06-05 22:57:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10169 to 9004. [2021-06-05 22:57:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9004 states, 9003 states have (on average 3.035210485393758) internal successors, (27326), 9003 states have internal predecessors, (27326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9004 states to 9004 states and 27326 transitions. [2021-06-05 22:57:47,359 INFO L78 Accepts]: Start accepts. Automaton has 9004 states and 27326 transitions. Word has length 37 [2021-06-05 22:57:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:47,359 INFO L482 AbstractCegarLoop]: Abstraction has 9004 states and 27326 transitions. [2021-06-05 22:57:47,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:47,360 INFO L276 IsEmpty]: Start isEmpty. Operand 9004 states and 27326 transitions. [2021-06-05 22:57:47,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:47,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:47,369 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:47,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 22:57:47,569 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:47,569 INFO L82 PathProgramCache]: Analyzing trace with hash -2023109538, now seen corresponding path program 106 times [2021-06-05 22:57:47,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:47,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676007994] [2021-06-05 22:57:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:47,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:47,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676007994] [2021-06-05 22:57:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676007994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:47,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232418403] [2021-06-05 22:57:47,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:47,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:57:47,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:47,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:57:47,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:48,114 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:48,114 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 25 treesize of output 13 [2021-06-05 22:57:48,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:48,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:48,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:48,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 22:57:48,324 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:48,325 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 29 treesize of output 17 [2021-06-05 22:57:48,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:48,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:48,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:48,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:57:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:48,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232418403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:48,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:48,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:57:48,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772622927] [2021-06-05 22:57:48,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:57:48,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:57:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:57:48,520 INFO L87 Difference]: Start difference. First operand 9004 states and 27326 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:51,715 INFO L93 Difference]: Finished difference Result 14444 states and 43442 transitions. [2021-06-05 22:57:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 22:57:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:51,735 INFO L225 Difference]: With dead ends: 14444 [2021-06-05 22:57:51,735 INFO L226 Difference]: Without dead ends: 14352 [2021-06-05 22:57:51,736 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 2189.2ms TimeCoverageRelationStatistics Valid=516, Invalid=5804, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 22:57:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14352 states. [2021-06-05 22:57:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14352 to 9126. [2021-06-05 22:57:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9126 states, 9125 states have (on average 3.0337534246575344) internal successors, (27683), 9125 states have internal predecessors, (27683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:51,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9126 states to 9126 states and 27683 transitions. [2021-06-05 22:57:51,879 INFO L78 Accepts]: Start accepts. Automaton has 9126 states and 27683 transitions. Word has length 37 [2021-06-05 22:57:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:51,879 INFO L482 AbstractCegarLoop]: Abstraction has 9126 states and 27683 transitions. [2021-06-05 22:57:51,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9126 states and 27683 transitions. [2021-06-05 22:57:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:51,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:51,889 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:52,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:52,101 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:52,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:52,101 INFO L82 PathProgramCache]: Analyzing trace with hash -326803298, now seen corresponding path program 107 times [2021-06-05 22:57:52,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:52,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807336235] [2021-06-05 22:57:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:52,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:52,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807336235] [2021-06-05 22:57:52,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807336235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:52,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641725430] [2021-06-05 22:57:52,398 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:52,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:57:52,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 22:57:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:52,605 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:52,605 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 36 treesize of output 20 [2021-06-05 22:57:52,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:52,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:52,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:52,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 22:57:52,738 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:52,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2021-06-05 22:57:52,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:52,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:52,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:52,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:17 [2021-06-05 22:57:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:52,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641725430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:52,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:52,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:57:52,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859543641] [2021-06-05 22:57:52,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:57:52,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:52,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:57:52,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1103, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:57:52,910 INFO L87 Difference]: Start difference. First operand 9126 states and 27683 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:57:54,738 INFO L93 Difference]: Finished difference Result 11066 states and 33453 transitions. [2021-06-05 22:57:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:57:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:57:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:57:54,753 INFO L225 Difference]: With dead ends: 11066 [2021-06-05 22:57:54,753 INFO L226 Difference]: Without dead ends: 11008 [2021-06-05 22:57:54,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1255.8ms TimeCoverageRelationStatistics Valid=211, Invalid=2545, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 22:57:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11008 states. [2021-06-05 22:57:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11008 to 9139. [2021-06-05 22:57:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9139 states, 9138 states have (on average 3.0408185598599258) internal successors, (27787), 9138 states have internal predecessors, (27787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9139 states to 9139 states and 27787 transitions. [2021-06-05 22:57:54,871 INFO L78 Accepts]: Start accepts. Automaton has 9139 states and 27787 transitions. Word has length 37 [2021-06-05 22:57:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:57:54,871 INFO L482 AbstractCegarLoop]: Abstraction has 9139 states and 27787 transitions. [2021-06-05 22:57:54,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:57:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 9139 states and 27787 transitions. [2021-06-05 22:57:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:57:54,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:57:54,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:57:55,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:55,081 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:57:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:57:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2098593696, now seen corresponding path program 108 times [2021-06-05 22:57:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:57:55,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442497351] [2021-06-05 22:57:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:57:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:57:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:55,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:57:55,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442497351] [2021-06-05 22:57:55,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442497351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:55,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993290576] [2021-06-05 22:57:55,429 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:57:55,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:57:55,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:57:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:57:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:57:55,751 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:55,751 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 31 treesize of output 19 [2021-06-05 22:57:55,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:55,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:55,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:55,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 22:57:55,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:57:55,829 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 43 treesize of output 23 [2021-06-05 22:57:55,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:57:55,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:57:55,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:57:55,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:57:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:57:55,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993290576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:57:55,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:57:55,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:57:55,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656410008] [2021-06-05 22:57:55,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:57:55,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:57:55,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:57:55,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:57:55,997 INFO L87 Difference]: Start difference. First operand 9139 states and 27787 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:01,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:01,526 INFO L93 Difference]: Finished difference Result 21012 states and 62619 transitions. [2021-06-05 22:58:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 22:58:01,526 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:01,555 INFO L225 Difference]: With dead ends: 21012 [2021-06-05 22:58:01,555 INFO L226 Difference]: Without dead ends: 20662 [2021-06-05 22:58:01,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 4321.7ms TimeCoverageRelationStatistics Valid=1388, Invalid=13132, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 22:58:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20662 states. [2021-06-05 22:58:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20662 to 9536. [2021-06-05 22:58:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9536 states, 9535 states have (on average 3.042999475616151) internal successors, (29015), 9535 states have internal predecessors, (29015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9536 states to 9536 states and 29015 transitions. [2021-06-05 22:58:01,742 INFO L78 Accepts]: Start accepts. Automaton has 9536 states and 29015 transitions. Word has length 37 [2021-06-05 22:58:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:01,742 INFO L482 AbstractCegarLoop]: Abstraction has 9536 states and 29015 transitions. [2021-06-05 22:58:01,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9536 states and 29015 transitions. [2021-06-05 22:58:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:01,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:01,752 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:01,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:01,953 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash -402287456, now seen corresponding path program 109 times [2021-06-05 22:58:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:01,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813486182] [2021-06-05 22:58:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:02,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:02,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:02,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813486182] [2021-06-05 22:58:02,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813486182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:02,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121136078] [2021-06-05 22:58:02,313 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:58:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:02,595 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:02,595 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 31 treesize of output 19 [2021-06-05 22:58:02,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:02,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:02,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:02,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:39 [2021-06-05 22:58:02,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:02,661 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 29 treesize of output 17 [2021-06-05 22:58:02,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:02,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:02,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:02,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:58:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:02,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121136078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:02,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:02,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2021-06-05 22:58:02,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29712818] [2021-06-05 22:58:02,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 22:58:02,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:02,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 22:58:02,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 22:58:02,820 INFO L87 Difference]: Start difference. First operand 9536 states and 29015 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:06,886 INFO L93 Difference]: Finished difference Result 14707 states and 44309 transitions. [2021-06-05 22:58:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 22:58:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:06,906 INFO L225 Difference]: With dead ends: 14707 [2021-06-05 22:58:06,907 INFO L226 Difference]: Without dead ends: 14334 [2021-06-05 22:58:06,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2626.8ms TimeCoverageRelationStatistics Valid=530, Invalid=7480, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 22:58:06,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14334 states. [2021-06-05 22:58:07,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14334 to 9486. [2021-06-05 22:58:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9486 states, 9485 states have (on average 3.0481813389562467) internal successors, (28912), 9485 states have internal predecessors, (28912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9486 states to 9486 states and 28912 transitions. [2021-06-05 22:58:07,048 INFO L78 Accepts]: Start accepts. Automaton has 9486 states and 28912 transitions. Word has length 37 [2021-06-05 22:58:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:07,049 INFO L482 AbstractCegarLoop]: Abstraction has 9486 states and 28912 transitions. [2021-06-05 22:58:07,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 9486 states and 28912 transitions. [2021-06-05 22:58:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:07,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:07,058 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:07,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:07,259 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:07,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:07,259 INFO L82 PathProgramCache]: Analyzing trace with hash 956108654, now seen corresponding path program 110 times [2021-06-05 22:58:07,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:07,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799186150] [2021-06-05 22:58:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:07,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:07,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:07,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799186150] [2021-06-05 22:58:07,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799186150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:07,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69162067] [2021-06-05 22:58:07,629 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:07,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:58:07,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:07,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:58:07,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:07,962 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:07,962 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 25 treesize of output 13 [2021-06-05 22:58:07,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:07,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:07,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:07,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:58:08,039 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:08,039 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 29 treesize of output 17 [2021-06-05 22:58:08,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:08,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:08,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:08,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:58:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:08,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69162067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:08,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:08,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 22:58:08,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62523261] [2021-06-05 22:58:08,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 22:58:08,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:08,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 22:58:08,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:58:08,226 INFO L87 Difference]: Start difference. First operand 9486 states and 28912 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:13,551 INFO L93 Difference]: Finished difference Result 19378 states and 57436 transitions. [2021-06-05 22:58:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 22:58:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:13,577 INFO L225 Difference]: With dead ends: 19378 [2021-06-05 22:58:13,577 INFO L226 Difference]: Without dead ends: 19107 [2021-06-05 22:58:13,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3967 ImplicationChecksByTransitivity, 4339.8ms TimeCoverageRelationStatistics Valid=1333, Invalid=12947, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 22:58:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19107 states. [2021-06-05 22:58:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19107 to 9555. [2021-06-05 22:58:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9555 states, 9554 states have (on average 3.043541971948922) internal successors, (29078), 9554 states have internal predecessors, (29078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9555 states to 9555 states and 29078 transitions. [2021-06-05 22:58:13,751 INFO L78 Accepts]: Start accepts. Automaton has 9555 states and 29078 transitions. Word has length 37 [2021-06-05 22:58:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:13,751 INFO L482 AbstractCegarLoop]: Abstraction has 9555 states and 29078 transitions. [2021-06-05 22:58:13,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:13,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9555 states and 29078 transitions. [2021-06-05 22:58:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:13,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:13,761 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:13,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:13,962 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:13,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:13,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1642552402, now seen corresponding path program 111 times [2021-06-05 22:58:13,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:13,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413626238] [2021-06-05 22:58:13,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:14,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:14,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413626238] [2021-06-05 22:58:14,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413626238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:14,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695626956] [2021-06-05 22:58:14,329 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:14,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:58:14,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:58:14,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:14,665 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:14,666 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 31 treesize of output 19 [2021-06-05 22:58:14,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:14,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:14,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:14,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:37 [2021-06-05 22:58:14,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 22:58:14,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 22:58:14,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 23 [2021-06-05 22:58:14,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:14,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:14,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:14,778 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:54, output treesize:20 [2021-06-05 22:58:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:15,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695626956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:15,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:15,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:58:15,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429396839] [2021-06-05 22:58:15,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:58:15,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:15,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:58:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:58:15,060 INFO L87 Difference]: Start difference. First operand 9555 states and 29078 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:20,238 INFO L93 Difference]: Finished difference Result 14453 states and 43491 transitions. [2021-06-05 22:58:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 22:58:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:20,258 INFO L225 Difference]: With dead ends: 14453 [2021-06-05 22:58:20,258 INFO L226 Difference]: Without dead ends: 14142 [2021-06-05 22:58:20,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 3515.9ms TimeCoverageRelationStatistics Valid=606, Invalid=8706, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 22:58:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14142 states. [2021-06-05 22:58:20,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14142 to 9678. [2021-06-05 22:58:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9678 states, 9677 states have (on average 3.0522889325204092) internal successors, (29537), 9677 states have internal predecessors, (29537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9678 states to 9678 states and 29537 transitions. [2021-06-05 22:58:20,410 INFO L78 Accepts]: Start accepts. Automaton has 9678 states and 29537 transitions. Word has length 37 [2021-06-05 22:58:20,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:20,410 INFO L482 AbstractCegarLoop]: Abstraction has 9678 states and 29537 transitions. [2021-06-05 22:58:20,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:20,410 INFO L276 IsEmpty]: Start isEmpty. Operand 9678 states and 29537 transitions. [2021-06-05 22:58:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:20,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:20,420 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:20,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 22:58:20,629 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 45112722, now seen corresponding path program 112 times [2021-06-05 22:58:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564671727] [2021-06-05 22:58:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:20,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564671727] [2021-06-05 22:58:20,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564671727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:20,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950612778] [2021-06-05 22:58:20,966 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:20,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:20,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:20,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:58:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:21,196 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:21,196 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 27 treesize of output 15 [2021-06-05 22:58:21,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:21,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:21,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:21,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:58:21,370 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:21,371 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 29 treesize of output 17 [2021-06-05 22:58:21,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:21,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:21,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:21,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:58:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:21,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950612778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:21,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:21,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:58:21,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664350424] [2021-06-05 22:58:21,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:58:21,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:21,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:58:21,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:58:21,593 INFO L87 Difference]: Start difference. First operand 9678 states and 29537 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:27,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:27,223 INFO L93 Difference]: Finished difference Result 18391 states and 54943 transitions. [2021-06-05 22:58:27,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 22:58:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:27,249 INFO L225 Difference]: With dead ends: 18391 [2021-06-05 22:58:27,250 INFO L226 Difference]: Without dead ends: 18112 [2021-06-05 22:58:27,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 4318.0ms TimeCoverageRelationStatistics Valid=1249, Invalid=12091, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 22:58:27,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18112 states. [2021-06-05 22:58:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18112 to 9905. [2021-06-05 22:58:27,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9905 states, 9904 states have (on average 3.050787560581583) internal successors, (30215), 9904 states have internal predecessors, (30215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:27,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9905 states to 9905 states and 30215 transitions. [2021-06-05 22:58:27,430 INFO L78 Accepts]: Start accepts. Automaton has 9905 states and 30215 transitions. Word has length 37 [2021-06-05 22:58:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:27,430 INFO L482 AbstractCegarLoop]: Abstraction has 9905 states and 30215 transitions. [2021-06-05 22:58:27,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:27,430 INFO L276 IsEmpty]: Start isEmpty. Operand 9905 states and 30215 transitions. [2021-06-05 22:58:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:27,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:27,441 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:27,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:27,642 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1741418962, now seen corresponding path program 113 times [2021-06-05 22:58:27,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:27,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348946318] [2021-06-05 22:58:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:28,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:28,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348946318] [2021-06-05 22:58:28,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348946318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:28,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592465926] [2021-06-05 22:58:28,038 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:28,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:58:28,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:28,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 22:58:28,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:28,261 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:28,262 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 25 treesize of output 13 [2021-06-05 22:58:28,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:28,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:28,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:28,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:58:28,422 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:28,423 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 29 treesize of output 17 [2021-06-05 22:58:28,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:28,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:28,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:28,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:58:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:28,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592465926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:28,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:28,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2021-06-05 22:58:28,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775661986] [2021-06-05 22:58:28,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 22:58:28,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:28,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 22:58:28,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 22:58:28,571 INFO L87 Difference]: Start difference. First operand 9905 states and 30215 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:29,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:29,940 INFO L93 Difference]: Finished difference Result 11608 states and 35225 transitions. [2021-06-05 22:58:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 22:58:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:29,955 INFO L225 Difference]: With dead ends: 11608 [2021-06-05 22:58:29,955 INFO L226 Difference]: Without dead ends: 11412 [2021-06-05 22:58:29,956 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 1445.9ms TimeCoverageRelationStatistics Valid=289, Invalid=3133, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 22:58:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11412 states. [2021-06-05 22:58:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11412 to 10057. [2021-06-05 22:58:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10057 states, 10056 states have (on average 3.057875894988067) internal successors, (30750), 10056 states have internal predecessors, (30750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 30750 transitions. [2021-06-05 22:58:30,091 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 30750 transitions. Word has length 37 [2021-06-05 22:58:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:30,091 INFO L482 AbstractCegarLoop]: Abstraction has 10057 states and 30750 transitions. [2021-06-05 22:58:30,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 30750 transitions. [2021-06-05 22:58:30,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:30,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:30,101 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:30,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:30,302 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:30,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2018791546, now seen corresponding path program 114 times [2021-06-05 22:58:30,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:30,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616427132] [2021-06-05 22:58:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:30,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616427132] [2021-06-05 22:58:30,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616427132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423793502] [2021-06-05 22:58:30,693 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:30,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:58:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:30,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:58:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:30,922 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:30,922 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 27 treesize of output 15 [2021-06-05 22:58:30,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:30,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:30,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:30,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:58:31,107 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:31,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-06-05 22:58:31,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:31,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:31,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:31,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 22:58:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:31,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423793502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:31,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:31,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:58:31,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752881360] [2021-06-05 22:58:31,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:58:31,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:31,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:58:31,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:58:31,288 INFO L87 Difference]: Start difference. First operand 10057 states and 30750 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:35,398 INFO L93 Difference]: Finished difference Result 15470 states and 46761 transitions. [2021-06-05 22:58:35,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 22:58:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:35,421 INFO L225 Difference]: With dead ends: 15470 [2021-06-05 22:58:35,421 INFO L226 Difference]: Without dead ends: 15214 [2021-06-05 22:58:35,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1905 ImplicationChecksByTransitivity, 3060.1ms TimeCoverageRelationStatistics Valid=523, Invalid=7849, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 22:58:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15214 states. [2021-06-05 22:58:35,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15214 to 10066. [2021-06-05 22:58:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10066 states, 10065 states have (on average 3.0572280178837556) internal successors, (30771), 10065 states have internal predecessors, (30771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10066 states to 10066 states and 30771 transitions. [2021-06-05 22:58:35,581 INFO L78 Accepts]: Start accepts. Automaton has 10066 states and 30771 transitions. Word has length 37 [2021-06-05 22:58:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:35,581 INFO L482 AbstractCegarLoop]: Abstraction has 10066 states and 30771 transitions. [2021-06-05 22:58:35,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 10066 states and 30771 transitions. [2021-06-05 22:58:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:35,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:35,592 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:35,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 22:58:35,797 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:35,797 INFO L82 PathProgramCache]: Analyzing trace with hash 95462594, now seen corresponding path program 115 times [2021-06-05 22:58:35,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:35,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911319765] [2021-06-05 22:58:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:36,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:36,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911319765] [2021-06-05 22:58:36,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911319765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:36,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199190058] [2021-06-05 22:58:36,153 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:36,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:58:36,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:36,383 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:36,384 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 27 treesize of output 15 [2021-06-05 22:58:36,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:36,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:36,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:36,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:58:36,656 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:36,657 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 30 treesize of output 18 [2021-06-05 22:58:36,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:36,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:36,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:36,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:58:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:36,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199190058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:36,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:36,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:58:36,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179643194] [2021-06-05 22:58:36,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:58:36,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:58:36,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:58:36,824 INFO L87 Difference]: Start difference. First operand 10066 states and 30771 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:40,618 INFO L93 Difference]: Finished difference Result 15547 states and 47074 transitions. [2021-06-05 22:58:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 22:58:40,619 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:40,640 INFO L225 Difference]: With dead ends: 15547 [2021-06-05 22:58:40,640 INFO L226 Difference]: Without dead ends: 15268 [2021-06-05 22:58:40,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 2889.1ms TimeCoverageRelationStatistics Valid=442, Invalid=6868, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:58:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15268 states. [2021-06-05 22:58:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15268 to 10253. [2021-06-05 22:58:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 3.0635973468591495) internal successors, (31408), 10252 states have internal predecessors, (31408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 31408 transitions. [2021-06-05 22:58:40,796 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 31408 transitions. Word has length 37 [2021-06-05 22:58:40,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:40,796 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 31408 transitions. [2021-06-05 22:58:40,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:40,796 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 31408 transitions. [2021-06-05 22:58:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:40,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:40,806 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:41,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:41,007 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:41,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1240994454, now seen corresponding path program 116 times [2021-06-05 22:58:41,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:41,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440313443] [2021-06-05 22:58:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:41,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:41,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440313443] [2021-06-05 22:58:41,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440313443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:41,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362673256] [2021-06-05 22:58:41,353 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:41,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:58:41,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:41,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:58:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:41,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:41,606 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 27 treesize of output 15 [2021-06-05 22:58:41,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:41,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:41,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:41,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:58:41,792 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:41,792 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 29 treesize of output 17 [2021-06-05 22:58:41,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:41,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:41,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:41,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:58:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:41,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362673256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:41,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:41,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:58:41,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982207292] [2021-06-05 22:58:41,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:58:41,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:41,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:58:41,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:58:41,990 INFO L87 Difference]: Start difference. First operand 10253 states and 31408 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:45,998 INFO L93 Difference]: Finished difference Result 15818 states and 47909 transitions. [2021-06-05 22:58:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 22:58:45,998 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:45,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:46,021 INFO L225 Difference]: With dead ends: 15818 [2021-06-05 22:58:46,021 INFO L226 Difference]: Without dead ends: 15562 [2021-06-05 22:58:46,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2913.5ms TimeCoverageRelationStatistics Valid=472, Invalid=7010, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 22:58:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15562 states. [2021-06-05 22:58:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15562 to 10253. [2021-06-05 22:58:46,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10253 states, 10252 states have (on average 3.063304721030043) internal successors, (31405), 10252 states have internal predecessors, (31405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10253 states to 10253 states and 31405 transitions. [2021-06-05 22:58:46,201 INFO L78 Accepts]: Start accepts. Automaton has 10253 states and 31405 transitions. Word has length 37 [2021-06-05 22:58:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:46,201 INFO L482 AbstractCegarLoop]: Abstraction has 10253 states and 31405 transitions. [2021-06-05 22:58:46,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10253 states and 31405 transitions. [2021-06-05 22:58:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:46,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:46,211 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:46,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:46,412 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -939718702, now seen corresponding path program 117 times [2021-06-05 22:58:46,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:46,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017040918] [2021-06-05 22:58:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:46,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:46,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:46,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017040918] [2021-06-05 22:58:46,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017040918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:46,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377312579] [2021-06-05 22:58:46,766 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:46,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:58:46,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:46,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:58:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:46,998 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:46,999 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 31 treesize of output 19 [2021-06-05 22:58:46,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:47,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:47,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:47,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 22:58:47,231 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:47,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 22:58:47,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:47,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:47,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:47,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 22:58:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:47,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377312579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:47,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:47,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:58:47,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517608488] [2021-06-05 22:58:47,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:58:47,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:47,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:58:47,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:58:47,386 INFO L87 Difference]: Start difference. First operand 10253 states and 31405 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:51,571 INFO L93 Difference]: Finished difference Result 16186 states and 49037 transitions. [2021-06-05 22:58:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 22:58:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:51,593 INFO L225 Difference]: With dead ends: 16186 [2021-06-05 22:58:51,594 INFO L226 Difference]: Without dead ends: 15910 [2021-06-05 22:58:51,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 2869.6ms TimeCoverageRelationStatistics Valid=448, Invalid=6862, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 22:58:51,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15910 states. [2021-06-05 22:58:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15910 to 10271. [2021-06-05 22:58:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10271 states, 10270 states have (on average 3.0632911392405062) internal successors, (31460), 10270 states have internal predecessors, (31460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10271 states to 10271 states and 31460 transitions. [2021-06-05 22:58:51,753 INFO L78 Accepts]: Start accepts. Automaton has 10271 states and 31460 transitions. Word has length 37 [2021-06-05 22:58:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:51,753 INFO L482 AbstractCegarLoop]: Abstraction has 10271 states and 31460 transitions. [2021-06-05 22:58:51,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 10271 states and 31460 transitions. [2021-06-05 22:58:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:51,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:51,764 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:51,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 22:58:51,965 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash -2146589852, now seen corresponding path program 118 times [2021-06-05 22:58:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:51,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446291909] [2021-06-05 22:58:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:51,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:52,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:52,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446291909] [2021-06-05 22:58:52,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446291909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:52,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982009810] [2021-06-05 22:58:52,368 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:52,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:58:52,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:58:52,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:52,611 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:52,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:58:52,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:52,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:52,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:52,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:58:52,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:52,845 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 30 treesize of output 18 [2021-06-05 22:58:52,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:52,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:52,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:52,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:58:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:53,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982009810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:53,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:53,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:58:53,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175208818] [2021-06-05 22:58:53,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:58:53,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:58:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1248, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:58:53,016 INFO L87 Difference]: Start difference. First operand 10271 states and 31460 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:56,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:58:56,850 INFO L93 Difference]: Finished difference Result 15619 states and 47242 transitions. [2021-06-05 22:58:56,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 22:58:56,850 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:58:56,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:58:56,871 INFO L225 Difference]: With dead ends: 15619 [2021-06-05 22:58:56,872 INFO L226 Difference]: Without dead ends: 15327 [2021-06-05 22:58:56,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 2813.1ms TimeCoverageRelationStatistics Valid=409, Invalid=6233, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 22:58:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15327 states. [2021-06-05 22:58:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15327 to 10241. [2021-06-05 22:58:57,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10241 states, 10240 states have (on average 3.0640625) internal successors, (31376), 10240 states have internal predecessors, (31376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10241 states to 10241 states and 31376 transitions. [2021-06-05 22:58:57,028 INFO L78 Accepts]: Start accepts. Automaton has 10241 states and 31376 transitions. Word has length 37 [2021-06-05 22:58:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:58:57,029 INFO L482 AbstractCegarLoop]: Abstraction has 10241 states and 31376 transitions. [2021-06-05 22:58:57,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:58:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 10241 states and 31376 transitions. [2021-06-05 22:58:57,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:58:57,039 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:58:57,040 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:58:57,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:57,240 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:58:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:58:57,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1398529486, now seen corresponding path program 119 times [2021-06-05 22:58:57,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:58:57,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745195258] [2021-06-05 22:58:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:58:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:58:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:57,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:58:57,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745195258] [2021-06-05 22:58:57,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745195258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:57,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96437652] [2021-06-05 22:58:57,578 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:58:57,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:58:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:58:57,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:58:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:58:57,802 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:57,803 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 27 treesize of output 15 [2021-06-05 22:58:57,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:57,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:57,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:57,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:58:57,910 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:58:57,910 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 31 treesize of output 19 [2021-06-05 22:58:57,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:58:57,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:58:57,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:58:57,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:58:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:58:58,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96437652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:58:58,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:58:58,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:58:58,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752746732] [2021-06-05 22:58:58,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:58:58,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:58:58,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:58:58,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:58:58,050 INFO L87 Difference]: Start difference. First operand 10241 states and 31376 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:00,804 INFO L93 Difference]: Finished difference Result 19517 states and 58523 transitions. [2021-06-05 22:59:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 22:59:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:00,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:00,832 INFO L225 Difference]: With dead ends: 19517 [2021-06-05 22:59:00,833 INFO L226 Difference]: Without dead ends: 19238 [2021-06-05 22:59:00,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 2472.6ms TimeCoverageRelationStatistics Valid=812, Invalid=7378, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 22:59:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19238 states. [2021-06-05 22:59:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19238 to 10138. [2021-06-05 22:59:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10138 states, 10137 states have (on average 3.059583703265266) internal successors, (31015), 10137 states have internal predecessors, (31015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:01,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10138 states to 10138 states and 31015 transitions. [2021-06-05 22:59:01,083 INFO L78 Accepts]: Start accepts. Automaton has 10138 states and 31015 transitions. Word has length 37 [2021-06-05 22:59:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:01,083 INFO L482 AbstractCegarLoop]: Abstraction has 10138 states and 31015 transitions. [2021-06-05 22:59:01,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:01,083 INFO L276 IsEmpty]: Start isEmpty. Operand 10138 states and 31015 transitions. [2021-06-05 22:59:01,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:01,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:01,093 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:01,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 22:59:01,294 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1200131570, now seen corresponding path program 120 times [2021-06-05 22:59:01,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:01,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519994110] [2021-06-05 22:59:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:01,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519994110] [2021-06-05 22:59:01,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519994110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:01,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627476057] [2021-06-05 22:59:01,625 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:01,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:59:01,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 22:59:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:01,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:01,847 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 27 treesize of output 15 [2021-06-05 22:59:01,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:01,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:01,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:01,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:02,007 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:02,007 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 29 treesize of output 17 [2021-06-05 22:59:02,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:02,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:02,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:02,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:17 [2021-06-05 22:59:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:02,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627476057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:02,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:02,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287792963] [2021-06-05 22:59:02,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:02,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:02,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:02,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:02,172 INFO L87 Difference]: Start difference. First operand 10138 states and 31015 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:04,238 INFO L93 Difference]: Finished difference Result 12990 states and 39338 transitions. [2021-06-05 22:59:04,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:59:04,239 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:04,255 INFO L225 Difference]: With dead ends: 12990 [2021-06-05 22:59:04,256 INFO L226 Difference]: Without dead ends: 12694 [2021-06-05 22:59:04,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1544.6ms TimeCoverageRelationStatistics Valid=282, Invalid=3624, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:59:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12694 states. [2021-06-05 22:59:04,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12694 to 10072. [2021-06-05 22:59:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.0629530334624167) internal successors, (30847), 10071 states have internal predecessors, (30847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 30847 transitions. [2021-06-05 22:59:04,392 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 30847 transitions. Word has length 37 [2021-06-05 22:59:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:04,392 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 30847 transitions. [2021-06-05 22:59:04,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 30847 transitions. [2021-06-05 22:59:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:04,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:04,403 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:04,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 22:59:04,605 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:04,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:04,605 INFO L82 PathProgramCache]: Analyzing trace with hash -482505722, now seen corresponding path program 121 times [2021-06-05 22:59:04,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:04,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128798900] [2021-06-05 22:59:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:04,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:04,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128798900] [2021-06-05 22:59:04,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128798900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:04,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292236525] [2021-06-05 22:59:04,960 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:04,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:04,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:05,307 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:05,308 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 25 treesize of output 13 [2021-06-05 22:59:05,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:05,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:05,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:05,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:59:05,387 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:05,387 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 29 treesize of output 17 [2021-06-05 22:59:05,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:05,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:05,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:05,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:05,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292236525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:05,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:05,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2021-06-05 22:59:05,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805722933] [2021-06-05 22:59:05,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 22:59:05,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:05,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 22:59:05,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 22:59:05,577 INFO L87 Difference]: Start difference. First operand 10072 states and 30847 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:08,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:08,983 INFO L93 Difference]: Finished difference Result 15078 states and 45035 transitions. [2021-06-05 22:59:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 22:59:08,983 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:09,006 INFO L225 Difference]: With dead ends: 15078 [2021-06-05 22:59:09,006 INFO L226 Difference]: Without dead ends: 14872 [2021-06-05 22:59:09,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2673.5ms TimeCoverageRelationStatistics Valid=638, Invalid=6168, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 22:59:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14872 states. [2021-06-05 22:59:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14872 to 10048. [2021-06-05 22:59:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10048 states, 10047 states have (on average 3.059321190405096) internal successors, (30737), 10047 states have internal predecessors, (30737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10048 states to 10048 states and 30737 transitions. [2021-06-05 22:59:09,162 INFO L78 Accepts]: Start accepts. Automaton has 10048 states and 30737 transitions. Word has length 37 [2021-06-05 22:59:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:09,162 INFO L482 AbstractCegarLoop]: Abstraction has 10048 states and 30737 transitions. [2021-06-05 22:59:09,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10048 states and 30737 transitions. [2021-06-05 22:59:09,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:09,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:09,173 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:09,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-06-05 22:59:09,377 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:09,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1213800518, now seen corresponding path program 122 times [2021-06-05 22:59:09,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:09,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141961206] [2021-06-05 22:59:09,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:09,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:09,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:09,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141961206] [2021-06-05 22:59:09,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141961206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:09,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672888203] [2021-06-05 22:59:09,717 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:09,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:09,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:09,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:59:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:09,967 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:09,967 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 38 treesize of output 22 [2021-06-05 22:59:09,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:09,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:09,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:09,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:24 [2021-06-05 22:59:10,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:10,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 22:59:10,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:10,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:10,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:10,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:15 [2021-06-05 22:59:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:10,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672888203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:10,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:10,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:59:10,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493205023] [2021-06-05 22:59:10,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:59:10,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:10,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:59:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:59:10,242 INFO L87 Difference]: Start difference. First operand 10048 states and 30737 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:11,754 INFO L93 Difference]: Finished difference Result 11444 states and 34793 transitions. [2021-06-05 22:59:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 22:59:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:11,769 INFO L225 Difference]: With dead ends: 11444 [2021-06-05 22:59:11,770 INFO L226 Difference]: Without dead ends: 11212 [2021-06-05 22:59:11,770 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1239.9ms TimeCoverageRelationStatistics Valid=199, Invalid=2351, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:59:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11212 states. [2021-06-05 22:59:11,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11212 to 9988. [2021-06-05 22:59:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 9987 states have (on average 3.0625813557624912) internal successors, (30586), 9987 states have internal predecessors, (30586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 30586 transitions. [2021-06-05 22:59:11,897 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 30586 transitions. Word has length 37 [2021-06-05 22:59:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:11,897 INFO L482 AbstractCegarLoop]: Abstraction has 9988 states and 30586 transitions. [2021-06-05 22:59:11,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 30586 transitions. [2021-06-05 22:59:11,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:11,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:11,907 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:12,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:12,108 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:12,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:12,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1393501654, now seen corresponding path program 123 times [2021-06-05 22:59:12,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:12,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983603855] [2021-06-05 22:59:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:12,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:12,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983603855] [2021-06-05 22:59:12,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983603855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:12,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871588444] [2021-06-05 22:59:12,424 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:12,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:59:12,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:12,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:12,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:12,669 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:12,670 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 27 treesize of output 15 [2021-06-05 22:59:12,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:12,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:12,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:12,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:12,844 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:12,844 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 29 treesize of output 17 [2021-06-05 22:59:12,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:12,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:12,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:12,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:13,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871588444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:13,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:13,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:13,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534434070] [2021-06-05 22:59:13,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:13,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:13,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:13,079 INFO L87 Difference]: Start difference. First operand 9988 states and 30586 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:16,127 INFO L93 Difference]: Finished difference Result 14398 states and 43235 transitions. [2021-06-05 22:59:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:59:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:16,148 INFO L225 Difference]: With dead ends: 14398 [2021-06-05 22:59:16,148 INFO L226 Difference]: Without dead ends: 14119 [2021-06-05 22:59:16,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 2366.4ms TimeCoverageRelationStatistics Valid=512, Invalid=5038, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 22:59:16,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14119 states. [2021-06-05 22:59:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14119 to 10072. [2021-06-05 22:59:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10072 states, 10071 states have (on average 3.0604706583258863) internal successors, (30822), 10071 states have internal predecessors, (30822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10072 states to 10072 states and 30822 transitions. [2021-06-05 22:59:16,320 INFO L78 Accepts]: Start accepts. Automaton has 10072 states and 30822 transitions. Word has length 37 [2021-06-05 22:59:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:16,320 INFO L482 AbstractCegarLoop]: Abstraction has 10072 states and 30822 transitions. [2021-06-05 22:59:16,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 10072 states and 30822 transitions. [2021-06-05 22:59:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:16,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:16,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:16,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 22:59:16,531 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash 302804586, now seen corresponding path program 124 times [2021-06-05 22:59:16,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:16,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865067589] [2021-06-05 22:59:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:16,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865067589] [2021-06-05 22:59:16,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865067589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:16,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672654091] [2021-06-05 22:59:16,865 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:16,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:16,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:17,105 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:17,105 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 27 treesize of output 15 [2021-06-05 22:59:17,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:17,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:17,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:17,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:17,289 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:17,289 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 29 treesize of output 17 [2021-06-05 22:59:17,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:17,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:17,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:17,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:17,500 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:17,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672654091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:17,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:17,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:17,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712135382] [2021-06-05 22:59:17,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:17,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:17,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:17,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:17,501 INFO L87 Difference]: Start difference. First operand 10072 states and 30822 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:20,059 INFO L93 Difference]: Finished difference Result 11139 states and 33907 transitions. [2021-06-05 22:59:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 22:59:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:20,074 INFO L225 Difference]: With dead ends: 11139 [2021-06-05 22:59:20,074 INFO L226 Difference]: Without dead ends: 10972 [2021-06-05 22:59:20,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1912.6ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:59:20,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-06-05 22:59:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10021. [2021-06-05 22:59:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10021 states, 10020 states have (on average 3.061676646706587) internal successors, (30678), 10020 states have internal predecessors, (30678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10021 states to 10021 states and 30678 transitions. [2021-06-05 22:59:20,204 INFO L78 Accepts]: Start accepts. Automaton has 10021 states and 30678 transitions. Word has length 37 [2021-06-05 22:59:20,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:20,204 INFO L482 AbstractCegarLoop]: Abstraction has 10021 states and 30678 transitions. [2021-06-05 22:59:20,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:20,204 INFO L276 IsEmpty]: Start isEmpty. Operand 10021 states and 30678 transitions. [2021-06-05 22:59:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:20,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:20,214 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:20,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 22:59:20,415 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash 837561374, now seen corresponding path program 125 times [2021-06-05 22:59:20,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:20,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828068055] [2021-06-05 22:59:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:20,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:20,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828068055] [2021-06-05 22:59:20,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828068055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:20,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940080309] [2021-06-05 22:59:20,772 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:20,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:59:20,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:20,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:59:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:21,010 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:21,010 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 27 treesize of output 15 [2021-06-05 22:59:21,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:21,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:21,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:21,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:21,205 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:21,205 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 29 treesize of output 17 [2021-06-05 22:59:21,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:21,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:21,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:21,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:21,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940080309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:21,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:21,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:21,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210733286] [2021-06-05 22:59:21,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:21,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:21,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:21,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:21,426 INFO L87 Difference]: Start difference. First operand 10021 states and 30678 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:23,924 INFO L93 Difference]: Finished difference Result 11714 states and 35534 transitions. [2021-06-05 22:59:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 22:59:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:23,940 INFO L225 Difference]: With dead ends: 11714 [2021-06-05 22:59:23,940 INFO L226 Difference]: Without dead ends: 11527 [2021-06-05 22:59:23,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 2008.4ms TimeCoverageRelationStatistics Valid=271, Invalid=3761, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:59:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11527 states. [2021-06-05 22:59:24,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11527 to 10053. [2021-06-05 22:59:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10053 states, 10052 states have (on average 3.0612813370473537) internal successors, (30772), 10052 states have internal predecessors, (30772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10053 states to 10053 states and 30772 transitions. [2021-06-05 22:59:24,078 INFO L78 Accepts]: Start accepts. Automaton has 10053 states and 30772 transitions. Word has length 37 [2021-06-05 22:59:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:24,078 INFO L482 AbstractCegarLoop]: Abstraction has 10053 states and 30772 transitions. [2021-06-05 22:59:24,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10053 states and 30772 transitions. [2021-06-05 22:59:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:24,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:24,089 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:24,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 22:59:24,289 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1343151782, now seen corresponding path program 126 times [2021-06-05 22:59:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:24,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909308159] [2021-06-05 22:59:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:24,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:24,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:24,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909308159] [2021-06-05 22:59:24,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909308159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:24,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983491490] [2021-06-05 22:59:24,637 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:24,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:59:24,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:24,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:59:24,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:24,879 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:24,879 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 27 treesize of output 15 [2021-06-05 22:59:24,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:24,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:24,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:24,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:25,131 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:25,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 22:59:25,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:25,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:25,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:25,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 22:59:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:25,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983491490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:25,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:25,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:25,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982199896] [2021-06-05 22:59:25,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:25,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:25,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:25,343 INFO L87 Difference]: Start difference. First operand 10053 states and 30772 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:27,941 INFO L93 Difference]: Finished difference Result 11647 states and 35316 transitions. [2021-06-05 22:59:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:59:27,942 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:27,957 INFO L225 Difference]: With dead ends: 11647 [2021-06-05 22:59:27,958 INFO L226 Difference]: Without dead ends: 11447 [2021-06-05 22:59:27,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1968.0ms TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 22:59:27,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11447 states. [2021-06-05 22:59:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11447 to 10036. [2021-06-05 22:59:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10036 states, 10035 states have (on average 3.0617837568510216) internal successors, (30725), 10035 states have internal predecessors, (30725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 30725 transitions. [2021-06-05 22:59:28,146 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 30725 transitions. Word has length 37 [2021-06-05 22:59:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:28,146 INFO L482 AbstractCegarLoop]: Abstraction has 10036 states and 30725 transitions. [2021-06-05 22:59:28,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 30725 transitions. [2021-06-05 22:59:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:28,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:28,156 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:28,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:28,357 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash -197619922, now seen corresponding path program 127 times [2021-06-05 22:59:28,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:28,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507835480] [2021-06-05 22:59:28,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:28,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:28,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:28,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507835480] [2021-06-05 22:59:28,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507835480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:28,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90058843] [2021-06-05 22:59:28,695 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:28,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:28,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:28,932 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:28,933 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 25 treesize of output 13 [2021-06-05 22:59:28,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:28,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:28,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:28,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:59:29,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:29,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:59:29,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:29,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:29,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:29,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:29,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90058843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:29,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:29,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:29,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797411413] [2021-06-05 22:59:29,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:29,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:29,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:29,322 INFO L87 Difference]: Start difference. First operand 10036 states and 30725 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:31,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:31,803 INFO L93 Difference]: Finished difference Result 11924 states and 36186 transitions. [2021-06-05 22:59:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 22:59:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:31,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:31,818 INFO L225 Difference]: With dead ends: 11924 [2021-06-05 22:59:31,819 INFO L226 Difference]: Without dead ends: 11737 [2021-06-05 22:59:31,819 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1916.0ms TimeCoverageRelationStatistics Valid=272, Invalid=3760, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 22:59:31,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11737 states. [2021-06-05 22:59:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11737 to 10036. [2021-06-05 22:59:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10036 states, 10035 states have (on average 3.061484803188839) internal successors, (30722), 10035 states have internal predecessors, (30722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10036 states to 10036 states and 30722 transitions. [2021-06-05 22:59:31,980 INFO L78 Accepts]: Start accepts. Automaton has 10036 states and 30722 transitions. Word has length 37 [2021-06-05 22:59:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:31,980 INFO L482 AbstractCegarLoop]: Abstraction has 10036 states and 30722 transitions. [2021-06-05 22:59:31,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 10036 states and 30722 transitions. [2021-06-05 22:59:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:31,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:31,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:32,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:32,192 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:32,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:32,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1916634218, now seen corresponding path program 128 times [2021-06-05 22:59:32,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:32,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153564923] [2021-06-05 22:59:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:32,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:32,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153564923] [2021-06-05 22:59:32,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153564923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:32,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455303474] [2021-06-05 22:59:32,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:32,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:32,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:32,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:59:32,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:32,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:32,778 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 27 treesize of output 15 [2021-06-05 22:59:32,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:32,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:32,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:32,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:32,911 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:32,912 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 30 treesize of output 18 [2021-06-05 22:59:32,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:32,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:32,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:32,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:33,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455303474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:33,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:33,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 22:59:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901076222] [2021-06-05 22:59:33,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 22:59:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 22:59:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 22:59:33,046 INFO L87 Difference]: Start difference. First operand 10036 states and 30722 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:34,537 INFO L93 Difference]: Finished difference Result 11857 states and 35960 transitions. [2021-06-05 22:59:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 22:59:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:34,553 INFO L225 Difference]: With dead ends: 11857 [2021-06-05 22:59:34,553 INFO L226 Difference]: Without dead ends: 11641 [2021-06-05 22:59:34,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1256.1ms TimeCoverageRelationStatistics Valid=203, Invalid=2347, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 22:59:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11641 states. [2021-06-05 22:59:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11641 to 10009. [2021-06-05 22:59:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 3.062150279776179) internal successors, (30646), 10008 states have internal predecessors, (30646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 30646 transitions. [2021-06-05 22:59:34,748 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 30646 transitions. Word has length 37 [2021-06-05 22:59:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:34,748 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 30646 transitions. [2021-06-05 22:59:34,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 30646 transitions. [2021-06-05 22:59:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:34,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:34,758 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:34,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable231 [2021-06-05 22:59:34,959 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:34,959 INFO L82 PathProgramCache]: Analyzing trace with hash -40084890, now seen corresponding path program 129 times [2021-06-05 22:59:34,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:34,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376372957] [2021-06-05 22:59:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:35,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:35,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376372957] [2021-06-05 22:59:35,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376372957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:35,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911361859] [2021-06-05 22:59:35,287 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:35,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:59:35,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:35,524 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:35,524 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 25 treesize of output 13 [2021-06-05 22:59:35,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:35,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:35,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:35,532 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 22:59:35,708 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:35,709 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 29 treesize of output 17 [2021-06-05 22:59:35,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:35,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:35,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:35,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911361859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:35,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:35,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:35,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870115925] [2021-06-05 22:59:35,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:35,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:35,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:35,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:35,902 INFO L87 Difference]: Start difference. First operand 10009 states and 30646 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:38,663 INFO L93 Difference]: Finished difference Result 13826 states and 41577 transitions. [2021-06-05 22:59:38,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 22:59:38,663 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:38,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:38,683 INFO L225 Difference]: With dead ends: 13826 [2021-06-05 22:59:38,683 INFO L226 Difference]: Without dead ends: 13644 [2021-06-05 22:59:38,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2205.1ms TimeCoverageRelationStatistics Valid=433, Invalid=4679, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 22:59:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13644 states. [2021-06-05 22:59:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13644 to 10084. [2021-06-05 22:59:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10084 states, 10083 states have (on average 3.0606962213626896) internal successors, (30861), 10083 states have internal predecessors, (30861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10084 states to 10084 states and 30861 transitions. [2021-06-05 22:59:38,857 INFO L78 Accepts]: Start accepts. Automaton has 10084 states and 30861 transitions. Word has length 37 [2021-06-05 22:59:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:38,858 INFO L482 AbstractCegarLoop]: Abstraction has 10084 states and 30861 transitions. [2021-06-05 22:59:38,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10084 states and 30861 transitions. [2021-06-05 22:59:38,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:38,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:38,869 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:39,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 22:59:39,069 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:39,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1656221350, now seen corresponding path program 130 times [2021-06-05 22:59:39,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:39,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887643435] [2021-06-05 22:59:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:39,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:39,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887643435] [2021-06-05 22:59:39,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887643435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:39,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28814954] [2021-06-05 22:59:39,406 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:39,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 22:59:39,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:39,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:39,644 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:39,644 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 27 treesize of output 15 [2021-06-05 22:59:39,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:39,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:39,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:39,652 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:39,834 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:39,834 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 29 treesize of output 17 [2021-06-05 22:59:39,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:39,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:39,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:39,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:40,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28814954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:40,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:40,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:40,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812365297] [2021-06-05 22:59:40,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:40,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:40,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:40,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:40,050 INFO L87 Difference]: Start difference. First operand 10084 states and 30861 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:42,698 INFO L93 Difference]: Finished difference Result 11406 states and 34747 transitions. [2021-06-05 22:59:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 22:59:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:42,711 INFO L225 Difference]: With dead ends: 11406 [2021-06-05 22:59:42,711 INFO L226 Difference]: Without dead ends: 11242 [2021-06-05 22:59:42,711 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1894.9ms TimeCoverageRelationStatistics Valid=254, Invalid=3528, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 22:59:42,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11242 states. [2021-06-05 22:59:42,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11242 to 10018. [2021-06-05 22:59:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10018 states, 10017 states have (on average 3.0614954577218727) internal successors, (30667), 10017 states have internal predecessors, (30667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10018 states to 10018 states and 30667 transitions. [2021-06-05 22:59:42,828 INFO L78 Accepts]: Start accepts. Automaton has 10018 states and 30667 transitions. Word has length 37 [2021-06-05 22:59:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:42,829 INFO L482 AbstractCegarLoop]: Abstraction has 10018 states and 30667 transitions. [2021-06-05 22:59:42,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10018 states and 30667 transitions. [2021-06-05 22:59:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:42,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:42,839 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:43,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 22:59:43,039 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1754628988, now seen corresponding path program 131 times [2021-06-05 22:59:43,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:43,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376786675] [2021-06-05 22:59:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:43,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376786675] [2021-06-05 22:59:43,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376786675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:43,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120322544] [2021-06-05 22:59:43,366 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:43,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 22:59:43,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 22:59:43,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:43,610 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:43,611 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 27 treesize of output 15 [2021-06-05 22:59:43,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:43,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:43,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:43,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 22:59:43,853 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:43,853 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 30 treesize of output 18 [2021-06-05 22:59:43,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:43,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:43,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:43,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 22:59:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:44,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120322544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:44,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:44,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:44,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27122335] [2021-06-05 22:59:44,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:44,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:44,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:44,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:44,026 INFO L87 Difference]: Start difference. First operand 10018 states and 30667 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:47,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:47,014 INFO L93 Difference]: Finished difference Result 11821 states and 35885 transitions. [2021-06-05 22:59:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 22:59:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:47,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:47,030 INFO L225 Difference]: With dead ends: 11821 [2021-06-05 22:59:47,030 INFO L226 Difference]: Without dead ends: 11572 [2021-06-05 22:59:47,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2179.1ms TimeCoverageRelationStatistics Valid=304, Invalid=4118, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:59:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-06-05 22:59:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10051. [2021-06-05 22:59:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10051 states, 10050 states have (on average 3.0612935323383086) internal successors, (30766), 10050 states have internal predecessors, (30766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10051 states to 10051 states and 30766 transitions. [2021-06-05 22:59:47,166 INFO L78 Accepts]: Start accepts. Automaton has 10051 states and 30766 transitions. Word has length 37 [2021-06-05 22:59:47,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:47,166 INFO L482 AbstractCegarLoop]: Abstraction has 10051 states and 30766 transitions. [2021-06-05 22:59:47,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 10051 states and 30766 transitions. [2021-06-05 22:59:47,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:47,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:47,177 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:47,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 22:59:47,377 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:47,377 INFO L82 PathProgramCache]: Analyzing trace with hash 547757838, now seen corresponding path program 132 times [2021-06-05 22:59:47,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:47,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231948584] [2021-06-05 22:59:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:47,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:47,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231948584] [2021-06-05 22:59:47,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231948584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373148162] [2021-06-05 22:59:47,711 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:47,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 22:59:47,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:47,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 22:59:47,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:47,960 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:47,960 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 31 treesize of output 19 [2021-06-05 22:59:47,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:47,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:47,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:47,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:33 [2021-06-05 22:59:48,209 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:48,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 22:59:48,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:48,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:48,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:48,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 22:59:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:48,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373148162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:48,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:48,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:48,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673727051] [2021-06-05 22:59:48,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:48,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:48,384 INFO L87 Difference]: Start difference. First operand 10051 states and 30766 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:50,855 INFO L93 Difference]: Finished difference Result 11899 states and 36165 transitions. [2021-06-05 22:59:50,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 22:59:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:50,870 INFO L225 Difference]: With dead ends: 11899 [2021-06-05 22:59:50,870 INFO L226 Difference]: Without dead ends: 11674 [2021-06-05 22:59:50,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1864.3ms TimeCoverageRelationStatistics Valid=245, Invalid=3415, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 22:59:50,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-06-05 22:59:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 10015. [2021-06-05 22:59:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.06291192330737) internal successors, (30672), 10014 states have internal predecessors, (30672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30672 transitions. [2021-06-05 22:59:51,005 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30672 transitions. Word has length 37 [2021-06-05 22:59:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:51,005 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30672 transitions. [2021-06-05 22:59:51,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30672 transitions. [2021-06-05 22:59:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:51,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:51,015 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:51,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:51,216 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:51,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:51,216 INFO L82 PathProgramCache]: Analyzing trace with hash 859170464, now seen corresponding path program 133 times [2021-06-05 22:59:51,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:51,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44639050] [2021-06-05 22:59:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:51,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:51,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44639050] [2021-06-05 22:59:51,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44639050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:51,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082141805] [2021-06-05 22:59:51,574 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:51,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:51,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:51,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:51,778 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 27 treesize of output 15 [2021-06-05 22:59:51,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:51,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:51,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:51,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 22:59:51,974 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:51,974 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 29 treesize of output 17 [2021-06-05 22:59:51,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:51,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:51,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:51,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:52,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082141805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:52,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:52,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 22:59:52,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832357383] [2021-06-05 22:59:52,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 22:59:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:52,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 22:59:52,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 22:59:52,153 INFO L87 Difference]: Start difference. First operand 10015 states and 30672 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:55,124 INFO L93 Difference]: Finished difference Result 13542 states and 40720 transitions. [2021-06-05 22:59:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 22:59:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:55,144 INFO L225 Difference]: With dead ends: 13542 [2021-06-05 22:59:55,144 INFO L226 Difference]: Without dead ends: 13360 [2021-06-05 22:59:55,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 2271.8ms TimeCoverageRelationStatistics Valid=562, Invalid=5290, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 22:59:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13360 states. [2021-06-05 22:59:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13360 to 10030. [2021-06-05 22:59:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10030 states, 10029 states have (on average 3.061421876557982) internal successors, (30703), 10029 states have internal predecessors, (30703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:55,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10030 states to 10030 states and 30703 transitions. [2021-06-05 22:59:55,299 INFO L78 Accepts]: Start accepts. Automaton has 10030 states and 30703 transitions. Word has length 37 [2021-06-05 22:59:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:55,299 INFO L482 AbstractCegarLoop]: Abstraction has 10030 states and 30703 transitions. [2021-06-05 22:59:55,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 10030 states and 30703 transitions. [2021-06-05 22:59:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:55,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:55,310 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:55,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:55,511 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1739490592, now seen corresponding path program 134 times [2021-06-05 22:59:55,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:55,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683721533] [2021-06-05 22:59:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:55,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:55,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683721533] [2021-06-05 22:59:55,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683721533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:55,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708441816] [2021-06-05 22:59:55,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:55,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 22:59:55,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:55,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:56,056 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:56,056 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 27 treesize of output 15 [2021-06-05 22:59:56,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:56,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:56,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:56,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 22:59:56,266 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 22:59:56,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:56,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:56,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:56,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 22:59:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:56,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708441816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:56,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 22:59:56,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 22:59:56,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041052740] [2021-06-05 22:59:56,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 22:59:56,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 22:59:56,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 22:59:56,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1250, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 22:59:56,476 INFO L87 Difference]: Start difference. First operand 10030 states and 30703 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 22:59:58,933 INFO L93 Difference]: Finished difference Result 11133 states and 33857 transitions. [2021-06-05 22:59:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 22:59:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 22:59:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 22:59:58,948 INFO L225 Difference]: With dead ends: 11133 [2021-06-05 22:59:58,949 INFO L226 Difference]: Without dead ends: 10930 [2021-06-05 22:59:58,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2123.4ms TimeCoverageRelationStatistics Valid=305, Invalid=4117, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 22:59:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10930 states. [2021-06-05 22:59:59,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10930 to 10015. [2021-06-05 22:59:59,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.062612342720192) internal successors, (30669), 10014 states have internal predecessors, (30669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30669 transitions. [2021-06-05 22:59:59,075 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30669 transitions. Word has length 37 [2021-06-05 22:59:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 22:59:59,075 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30669 transitions. [2021-06-05 22:59:59,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 22:59:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30669 transitions. [2021-06-05 22:59:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 22:59:59,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 22:59:59,085 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 22:59:59,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:59,286 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 22:59:59,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 22:59:59,286 INFO L82 PathProgramCache]: Analyzing trace with hash -885193542, now seen corresponding path program 135 times [2021-06-05 22:59:59,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 22:59:59,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981542894] [2021-06-05 22:59:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 22:59:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 22:59:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 22:59:59,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 22:59:59,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981542894] [2021-06-05 22:59:59,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981542894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 22:59:59,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265442592] [2021-06-05 22:59:59,637 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 22:59:59,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 22:59:59,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 22:59:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 22:59:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 22:59:59,836 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 22:59:59,836 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 27 treesize of output 15 [2021-06-05 22:59:59,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 22:59:59,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 22:59:59,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 22:59:59,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:00:00,044 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:00,044 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 29 treesize of output 17 [2021-06-05 23:00:00,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:00,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:00,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:00,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 23:00:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:00,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265442592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:00,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:00,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 23:00:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267061258] [2021-06-05 23:00:00,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:00:00,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:00:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:00:00,221 INFO L87 Difference]: Start difference. First operand 10015 states and 30669 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:03,175 INFO L93 Difference]: Finished difference Result 13770 states and 41415 transitions. [2021-06-05 23:00:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:00:03,175 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:03,194 INFO L225 Difference]: With dead ends: 13770 [2021-06-05 23:00:03,194 INFO L226 Difference]: Without dead ends: 13588 [2021-06-05 23:00:03,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 2415.0ms TimeCoverageRelationStatistics Valid=550, Invalid=5456, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 23:00:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13588 states. [2021-06-05 23:00:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13588 to 10015. [2021-06-05 23:00:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10015 states, 10014 states have (on average 3.061314160175754) internal successors, (30656), 10014 states have internal predecessors, (30656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:03,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10015 states to 10015 states and 30656 transitions. [2021-06-05 23:00:03,344 INFO L78 Accepts]: Start accepts. Automaton has 10015 states and 30656 transitions. Word has length 37 [2021-06-05 23:00:03,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:03,344 INFO L482 AbstractCegarLoop]: Abstraction has 10015 states and 30656 transitions. [2021-06-05 23:00:03,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 10015 states and 30656 transitions. [2021-06-05 23:00:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:03,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:03,355 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:03,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 23:00:03,556 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:03,556 INFO L82 PathProgramCache]: Analyzing trace with hash 811112698, now seen corresponding path program 136 times [2021-06-05 23:00:03,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:03,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677763859] [2021-06-05 23:00:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:03,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677763859] [2021-06-05 23:00:03,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677763859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572486079] [2021-06-05 23:00:03,949 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:03,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:00:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:04,153 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:04,153 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 25 treesize of output 13 [2021-06-05 23:00:04,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:04,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:04,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:04,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 23:00:04,365 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:04,366 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 29 treesize of output 17 [2021-06-05 23:00:04,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:04,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:04,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:04,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 23:00:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:04,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572486079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:04,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:04,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 23:00:04,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824808008] [2021-06-05 23:00:04,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:00:04,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:04,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:00:04,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:00:04,584 INFO L87 Difference]: Start difference. First operand 10015 states and 30656 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:07,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:07,086 INFO L93 Difference]: Finished difference Result 11289 states and 34375 transitions. [2021-06-05 23:00:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:00:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:07,102 INFO L225 Difference]: With dead ends: 11289 [2021-06-05 23:00:07,102 INFO L226 Difference]: Without dead ends: 11125 [2021-06-05 23:00:07,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 2021.7ms TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:00:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11125 states. [2021-06-05 23:00:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11125 to 10009. [2021-06-05 23:00:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10009 states, 10008 states have (on average 3.061550759392486) internal successors, (30640), 10008 states have internal predecessors, (30640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:07,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10009 states to 10009 states and 30640 transitions. [2021-06-05 23:00:07,240 INFO L78 Accepts]: Start accepts. Automaton has 10009 states and 30640 transitions. Word has length 37 [2021-06-05 23:00:07,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:07,240 INFO L482 AbstractCegarLoop]: Abstraction has 10009 states and 30640 transitions. [2021-06-05 23:00:07,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:07,241 INFO L276 IsEmpty]: Start isEmpty. Operand 10009 states and 30640 transitions. [2021-06-05 23:00:07,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:07,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:07,252 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:07,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 23:00:07,461 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1369600458, now seen corresponding path program 137 times [2021-06-05 23:00:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:07,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217863487] [2021-06-05 23:00:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:07,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217863487] [2021-06-05 23:00:07,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217863487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:07,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663259866] [2021-06-05 23:00:07,797 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:07,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:00:07,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-05 23:00:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:08,010 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:08,010 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 29 treesize of output 17 [2021-06-05 23:00:08,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:08,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:08,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:08,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:24 [2021-06-05 23:00:08,178 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:08,178 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 21 [2021-06-05 23:00:08,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:08,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:08,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:08,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:18 [2021-06-05 23:00:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:08,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663259866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:08,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:08,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 23:00:08,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147064572] [2021-06-05 23:00:08,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:00:08,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:08,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:00:08,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:00:08,334 INFO L87 Difference]: Start difference. First operand 10009 states and 30640 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:10,277 INFO L93 Difference]: Finished difference Result 11530 states and 34936 transitions. [2021-06-05 23:00:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:00:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:10,293 INFO L225 Difference]: With dead ends: 11530 [2021-06-05 23:00:10,293 INFO L226 Difference]: Without dead ends: 11283 [2021-06-05 23:00:10,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1500.6ms TimeCoverageRelationStatistics Valid=257, Invalid=2935, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:00:10,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11283 states. [2021-06-05 23:00:10,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11283 to 10060. [2021-06-05 23:00:10,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10060 states, 10059 states have (on average 3.0610398647976935) internal successors, (30791), 10059 states have internal predecessors, (30791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10060 states to 10060 states and 30791 transitions. [2021-06-05 23:00:10,437 INFO L78 Accepts]: Start accepts. Automaton has 10060 states and 30791 transitions. Word has length 37 [2021-06-05 23:00:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:10,437 INFO L482 AbstractCegarLoop]: Abstraction has 10060 states and 30791 transitions. [2021-06-05 23:00:10,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 10060 states and 30791 transitions. [2021-06-05 23:00:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:10,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:10,448 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:10,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 23:00:10,649 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1920374838, now seen corresponding path program 138 times [2021-06-05 23:00:10,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:10,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052542521] [2021-06-05 23:00:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:11,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052542521] [2021-06-05 23:00:11,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052542521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:11,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423717826] [2021-06-05 23:00:11,004 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:11,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:00:11,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:00:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:11,212 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:11,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 23:00:11,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:11,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:11,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:11,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:00:11,424 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:11,425 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 36 treesize of output 20 [2021-06-05 23:00:11,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:11,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:11,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:11,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 23:00:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:11,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423717826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:11,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:11,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 23:00:11,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611820326] [2021-06-05 23:00:11,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:00:11,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:11,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:00:11,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:00:11,595 INFO L87 Difference]: Start difference. First operand 10060 states and 30791 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:14,688 INFO L93 Difference]: Finished difference Result 13998 states and 42140 transitions. [2021-06-05 23:00:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:00:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:14,708 INFO L225 Difference]: With dead ends: 13998 [2021-06-05 23:00:14,708 INFO L226 Difference]: Without dead ends: 13825 [2021-06-05 23:00:14,709 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 2244.3ms TimeCoverageRelationStatistics Valid=477, Invalid=5073, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:00:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13825 states. [2021-06-05 23:00:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13825 to 9973. [2021-06-05 23:00:14,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9973 states, 9972 states have (on average 3.0628760529482553) internal successors, (30543), 9972 states have internal predecessors, (30543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9973 states to 9973 states and 30543 transitions. [2021-06-05 23:00:14,865 INFO L78 Accepts]: Start accepts. Automaton has 9973 states and 30543 transitions. Word has length 37 [2021-06-05 23:00:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:14,865 INFO L482 AbstractCegarLoop]: Abstraction has 9973 states and 30543 transitions. [2021-06-05 23:00:14,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 9973 states and 30543 transitions. [2021-06-05 23:00:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:14,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:14,876 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:15,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 23:00:15,077 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:15,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2082380068, now seen corresponding path program 139 times [2021-06-05 23:00:15,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:15,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912562460] [2021-06-05 23:00:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:15,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912562460] [2021-06-05 23:00:15,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912562460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:15,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960187733] [2021-06-05 23:00:15,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:15,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:00:15,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:15,747 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:15,747 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 25 treesize of output 13 [2021-06-05 23:00:15,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:15,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:15,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:15,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:24 [2021-06-05 23:00:15,951 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:15,951 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 29 treesize of output 17 [2021-06-05 23:00:15,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:15,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:15,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:15,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 23:00:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:16,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960187733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:16,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:16,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 23:00:16,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016800879] [2021-06-05 23:00:16,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:00:16,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:16,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:00:16,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:00:16,133 INFO L87 Difference]: Start difference. First operand 9973 states and 30543 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:18,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:18,447 INFO L93 Difference]: Finished difference Result 13546 states and 40841 transitions. [2021-06-05 23:00:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:00:18,447 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:18,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:18,466 INFO L225 Difference]: With dead ends: 13546 [2021-06-05 23:00:18,467 INFO L226 Difference]: Without dead ends: 13364 [2021-06-05 23:00:18,467 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 2109.6ms TimeCoverageRelationStatistics Valid=427, Invalid=4685, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 23:00:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13364 states. [2021-06-05 23:00:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13364 to 9949. [2021-06-05 23:00:18,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9949 states, 9948 states have (on average 3.0618214716525936) internal successors, (30459), 9948 states have internal predecessors, (30459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9949 states to 9949 states and 30459 transitions. [2021-06-05 23:00:18,622 INFO L78 Accepts]: Start accepts. Automaton has 9949 states and 30459 transitions. Word has length 37 [2021-06-05 23:00:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:18,623 INFO L482 AbstractCegarLoop]: Abstraction has 9949 states and 30459 transitions. [2021-06-05 23:00:18,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 9949 states and 30459 transitions. [2021-06-05 23:00:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:18,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:18,634 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:18,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:18,835 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -386073828, now seen corresponding path program 140 times [2021-06-05 23:00:18,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:18,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371460382] [2021-06-05 23:00:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:19,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371460382] [2021-06-05 23:00:19,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371460382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961759355] [2021-06-05 23:00:19,158 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:19,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:19,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:19,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:00:19,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:19,371 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:19,372 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 25 treesize of output 13 [2021-06-05 23:00:19,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:19,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:19,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:19,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:22 [2021-06-05 23:00:19,595 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:19,596 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 29 treesize of output 17 [2021-06-05 23:00:19,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:19,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:19,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:19,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 23:00:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:19,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961759355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:19,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:19,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 23:00:19,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674866285] [2021-06-05 23:00:19,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:00:19,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:19,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:00:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:00:19,810 INFO L87 Difference]: Start difference. First operand 9949 states and 30459 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:22,375 INFO L93 Difference]: Finished difference Result 11253 states and 34294 transitions. [2021-06-05 23:00:22,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:00:22,375 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:22,392 INFO L225 Difference]: With dead ends: 11253 [2021-06-05 23:00:22,392 INFO L226 Difference]: Without dead ends: 11089 [2021-06-05 23:00:22,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1961.7ms TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:00:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11089 states. [2021-06-05 23:00:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11089 to 9925. [2021-06-05 23:00:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9925 states, 9924 states have (on average 3.0620717452640065) internal successors, (30388), 9924 states have internal predecessors, (30388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9925 states to 9925 states and 30388 transitions. [2021-06-05 23:00:22,522 INFO L78 Accepts]: Start accepts. Automaton has 9925 states and 30388 transitions. Word has length 37 [2021-06-05 23:00:22,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:22,522 INFO L482 AbstractCegarLoop]: Abstraction has 9925 states and 30388 transitions. [2021-06-05 23:00:22,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:22,522 INFO L276 IsEmpty]: Start isEmpty. Operand 9925 states and 30388 transitions. [2021-06-05 23:00:22,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:22,532 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:22,532 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:22,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-06-05 23:00:22,733 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:22,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1728180312, now seen corresponding path program 141 times [2021-06-05 23:00:22,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:22,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369059468] [2021-06-05 23:00:22,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:23,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:23,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369059468] [2021-06-05 23:00:23,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369059468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:23,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524820735] [2021-06-05 23:00:23,091 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:23,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:00:23,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:23,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 23:00:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:23,322 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:23,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 23:00:23,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:23,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:23,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:23,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 23:00:23,612 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:23,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 24 [2021-06-05 23:00:23,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:23,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:23,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:23,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 23:00:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:23,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524820735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:23,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:23,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2021-06-05 23:00:23,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663593383] [2021-06-05 23:00:23,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 23:00:23,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 23:00:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1249, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:00:23,795 INFO L87 Difference]: Start difference. First operand 9925 states and 30388 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:26,561 INFO L93 Difference]: Finished difference Result 11364 states and 34628 transitions. [2021-06-05 23:00:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:00:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:26,575 INFO L225 Difference]: With dead ends: 11364 [2021-06-05 23:00:26,576 INFO L226 Difference]: Without dead ends: 11119 [2021-06-05 23:00:26,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2189.2ms TimeCoverageRelationStatistics Valid=274, Invalid=3758, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:00:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-06-05 23:00:26,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 9871. [2021-06-05 23:00:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9871 states, 9870 states have (on average 3.0641337386018237) internal successors, (30243), 9870 states have internal predecessors, (30243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9871 states to 9871 states and 30243 transitions. [2021-06-05 23:00:26,708 INFO L78 Accepts]: Start accepts. Automaton has 9871 states and 30243 transitions. Word has length 37 [2021-06-05 23:00:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:26,709 INFO L482 AbstractCegarLoop]: Abstraction has 9871 states and 30243 transitions. [2021-06-05 23:00:26,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 9871 states and 30243 transitions. [2021-06-05 23:00:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:26,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:26,719 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:26,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 23:00:26,919 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1079595590, now seen corresponding path program 142 times [2021-06-05 23:00:26,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:26,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986198641] [2021-06-05 23:00:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:27,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:27,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986198641] [2021-06-05 23:00:27,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986198641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:27,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694372733] [2021-06-05 23:00:27,264 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:27,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:27,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 23:00:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:27,471 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 23:00:27,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:27,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:27,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:27,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:00:27,681 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:27,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 23:00:27,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:27,688 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:27,688 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:27,688 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:20 [2021-06-05 23:00:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:27,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694372733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:27,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:27,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 38 [2021-06-05 23:00:27,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015082477] [2021-06-05 23:00:27,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 23:00:27,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:27,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 23:00:27,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:00:27,865 INFO L87 Difference]: Start difference. First operand 9871 states and 30243 transitions. Second operand has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:30,319 INFO L93 Difference]: Finished difference Result 14084 states and 42790 transitions. [2021-06-05 23:00:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:00:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:30,339 INFO L225 Difference]: With dead ends: 14084 [2021-06-05 23:00:30,339 INFO L226 Difference]: Without dead ends: 13992 [2021-06-05 23:00:30,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 2061.2ms TimeCoverageRelationStatistics Valid=451, Invalid=4805, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:00:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13992 states. [2021-06-05 23:00:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13992 to 9993. [2021-06-05 23:00:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9993 states, 9992 states have (on average 3.0624499599679744) internal successors, (30600), 9992 states have internal predecessors, (30600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9993 states to 9993 states and 30600 transitions. [2021-06-05 23:00:30,486 INFO L78 Accepts]: Start accepts. Automaton has 9993 states and 30600 transitions. Word has length 37 [2021-06-05 23:00:30,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:30,486 INFO L482 AbstractCegarLoop]: Abstraction has 9993 states and 30600 transitions. [2021-06-05 23:00:30,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.8717948717948718) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:30,486 INFO L276 IsEmpty]: Start isEmpty. Operand 9993 states and 30600 transitions. [2021-06-05 23:00:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 23:00:30,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:30,496 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:30,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 23:00:30,697 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1519065466, now seen corresponding path program 143 times [2021-06-05 23:00:30,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:30,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702428713] [2021-06-05 23:00:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:31,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:31,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702428713] [2021-06-05 23:00:31,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702428713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:31,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230963945] [2021-06-05 23:00:31,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:31,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:00:31,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:31,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 23:00:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:31,234 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:31,234 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 27 treesize of output 15 [2021-06-05 23:00:31,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:31,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:31,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:31,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 23:00:31,376 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:00:31,377 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 29 treesize of output 17 [2021-06-05 23:00:31,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:31,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:31,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:31,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:17 [2021-06-05 23:00:31,547 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:31,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230963945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:31,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:31,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 34 [2021-06-05 23:00:31,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795546420] [2021-06-05 23:00:31,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:00:31,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:31,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:00:31,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:00:31,548 INFO L87 Difference]: Start difference. First operand 9993 states and 30600 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:33,178 INFO L93 Difference]: Finished difference Result 11852 states and 36185 transitions. [2021-06-05 23:00:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:00:33,178 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 23:00:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:33,193 INFO L225 Difference]: With dead ends: 11852 [2021-06-05 23:00:33,193 INFO L226 Difference]: Without dead ends: 11794 [2021-06-05 23:00:33,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1304.7ms TimeCoverageRelationStatistics Valid=212, Invalid=2440, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:00:33,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11794 states. [2021-06-05 23:00:33,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11794 to 9787. [2021-06-05 23:00:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9787 states, 9786 states have (on average 3.066830165542612) internal successors, (30012), 9786 states have internal predecessors, (30012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9787 states to 9787 states and 30012 transitions. [2021-06-05 23:00:33,320 INFO L78 Accepts]: Start accepts. Automaton has 9787 states and 30012 transitions. Word has length 37 [2021-06-05 23:00:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:33,320 INFO L482 AbstractCegarLoop]: Abstraction has 9787 states and 30012 transitions. [2021-06-05 23:00:33,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 9787 states and 30012 transitions. [2021-06-05 23:00:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 23:00:33,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:33,331 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:33,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:33,531 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1180480077, now seen corresponding path program 144 times [2021-06-05 23:00:33,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:33,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741872458] [2021-06-05 23:00:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:33,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:33,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741872458] [2021-06-05 23:00:33,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741872458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:33,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842565906] [2021-06-05 23:00:33,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:33,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:00:33,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:00:33,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:33,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:33,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:33,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:33,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:33,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:33,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-06-05 23:00:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:33,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842565906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:33,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:33,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 23:00:33,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442371344] [2021-06-05 23:00:33,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:00:33,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:33,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:00:33,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:00:33,780 INFO L87 Difference]: Start difference. First operand 9787 states and 30012 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:34,001 INFO L93 Difference]: Finished difference Result 14719 states and 43834 transitions. [2021-06-05 23:00:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:00:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 40 [2021-06-05 23:00:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:34,022 INFO L225 Difference]: With dead ends: 14719 [2021-06-05 23:00:34,022 INFO L226 Difference]: Without dead ends: 14719 [2021-06-05 23:00:34,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:00:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14719 states. [2021-06-05 23:00:34,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14719 to 7251. [2021-06-05 23:00:34,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 7250 states have (on average 2.9986206896551724) internal successors, (21740), 7250 states have internal predecessors, (21740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 21740 transitions. [2021-06-05 23:00:34,141 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 21740 transitions. Word has length 40 [2021-06-05 23:00:34,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:34,141 INFO L482 AbstractCegarLoop]: Abstraction has 7251 states and 21740 transitions. [2021-06-05 23:00:34,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 21740 transitions. [2021-06-05 23:00:34,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 23:00:34,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:34,148 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:34,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:34,348 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:34,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:34,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1976946397, now seen corresponding path program 145 times [2021-06-05 23:00:34,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:34,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132702622] [2021-06-05 23:00:34,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:00:34,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:34,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132702622] [2021-06-05 23:00:34,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132702622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:34,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179852701] [2021-06-05 23:00:34,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:34,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:00:34,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:00:34,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179852701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:34,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:34,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:00:34,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246579502] [2021-06-05 23:00:34,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:00:34,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:00:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:00:34,434 INFO L87 Difference]: Start difference. First operand 7251 states and 21740 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:34,470 INFO L93 Difference]: Finished difference Result 12876 states and 38235 transitions. [2021-06-05 23:00:34,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:00:34,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 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 41 [2021-06-05 23:00:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:34,487 INFO L225 Difference]: With dead ends: 12876 [2021-06-05 23:00:34,487 INFO L226 Difference]: Without dead ends: 12623 [2021-06-05 23:00:34,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:00:34,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12623 states. [2021-06-05 23:00:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12623 to 9029. [2021-06-05 23:00:34,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9029 states, 9028 states have (on average 3.026251661497563) internal successors, (27321), 9028 states have internal predecessors, (27321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9029 states to 9029 states and 27321 transitions. [2021-06-05 23:00:34,615 INFO L78 Accepts]: Start accepts. Automaton has 9029 states and 27321 transitions. Word has length 41 [2021-06-05 23:00:34,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:34,615 INFO L482 AbstractCegarLoop]: Abstraction has 9029 states and 27321 transitions. [2021-06-05 23:00:34,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 9029 states and 27321 transitions. [2021-06-05 23:00:34,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 23:00:34,623 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:34,623 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:34,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:34,824 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:34,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1280099314, now seen corresponding path program 146 times [2021-06-05 23:00:34,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:34,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236558819] [2021-06-05 23:00:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:34,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236558819] [2021-06-05 23:00:34,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236558819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:34,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552175946] [2021-06-05 23:00:34,849 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:34,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:34,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:34,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 23:00:34,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:34,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552175946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:34,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:34,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 23:00:34,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396476126] [2021-06-05 23:00:34,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:00:34,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:34,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:00:34,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:00:34,924 INFO L87 Difference]: Start difference. First operand 9029 states and 27321 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:34,975 INFO L93 Difference]: Finished difference Result 18744 states and 57280 transitions. [2021-06-05 23:00:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:00:34,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 23:00:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:35,000 INFO L225 Difference]: With dead ends: 18744 [2021-06-05 23:00:35,000 INFO L226 Difference]: Without dead ends: 18363 [2021-06-05 23:00:35,000 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:00:35,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18363 states. [2021-06-05 23:00:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18363 to 15994. [2021-06-05 23:00:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15994 states, 15993 states have (on average 3.1260551491277435) internal successors, (49995), 15993 states have internal predecessors, (49995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:35,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15994 states to 15994 states and 49995 transitions. [2021-06-05 23:00:35,233 INFO L78 Accepts]: Start accepts. Automaton has 15994 states and 49995 transitions. Word has length 42 [2021-06-05 23:00:35,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:35,233 INFO L482 AbstractCegarLoop]: Abstraction has 15994 states and 49995 transitions. [2021-06-05 23:00:35,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:35,233 INFO L276 IsEmpty]: Start isEmpty. Operand 15994 states and 49995 transitions. [2021-06-05 23:00:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:35,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:35,252 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:35,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:35,468 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:35,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:35,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1019224685, now seen corresponding path program 147 times [2021-06-05 23:00:35,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:35,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049421265] [2021-06-05 23:00:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:35,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049421265] [2021-06-05 23:00:35,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049421265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357062493] [2021-06-05 23:00:35,605 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:35,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:00:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-05 23:00:35,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:36,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:00:36,175 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 51 treesize of output 29 [2021-06-05 23:00:36,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:36,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:36,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:36,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:49 [2021-06-05 23:00:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:36,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357062493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:36,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:36,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 26 [2021-06-05 23:00:36,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212961754] [2021-06-05 23:00:36,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:00:36,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:36,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:00:36,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:00:36,344 INFO L87 Difference]: Start difference. First operand 15994 states and 49995 transitions. Second operand has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:39,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:39,136 INFO L93 Difference]: Finished difference Result 23103 states and 71053 transitions. [2021-06-05 23:00:39,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:00:39,136 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:00:39,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:39,171 INFO L225 Difference]: With dead ends: 23103 [2021-06-05 23:00:39,171 INFO L226 Difference]: Without dead ends: 23103 [2021-06-05 23:00:39,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 2001.6ms TimeCoverageRelationStatistics Valid=412, Invalid=4280, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 23:00:39,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23103 states. [2021-06-05 23:00:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23103 to 18466. [2021-06-05 23:00:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18466 states, 18465 states have (on average 3.106959111833198) internal successors, (57370), 18465 states have internal predecessors, (57370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18466 states to 18466 states and 57370 transitions. [2021-06-05 23:00:39,507 INFO L78 Accepts]: Start accepts. Automaton has 18466 states and 57370 transitions. Word has length 45 [2021-06-05 23:00:39,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:39,507 INFO L482 AbstractCegarLoop]: Abstraction has 18466 states and 57370 transitions. [2021-06-05 23:00:39,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.740740740740741) internal successors, (74), 26 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:39,507 INFO L276 IsEmpty]: Start isEmpty. Operand 18466 states and 57370 transitions. [2021-06-05 23:00:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:39,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:39,527 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:39,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:39,727 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:39,728 INFO L82 PathProgramCache]: Analyzing trace with hash 701638189, now seen corresponding path program 148 times [2021-06-05 23:00:39,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:39,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493039651] [2021-06-05 23:00:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:39,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:39,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493039651] [2021-06-05 23:00:39,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493039651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:39,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430462407] [2021-06-05 23:00:39,823 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:39,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:39,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:00:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:39,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:00:39,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:39,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:39,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:39,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:7 [2021-06-05 23:00:40,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:40,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:40,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:40,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:40,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:00:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:40,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430462407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:40,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:40,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2021-06-05 23:00:40,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415826453] [2021-06-05 23:00:40,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:00:40,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:40,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:00:40,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:00:40,055 INFO L87 Difference]: Start difference. First operand 18466 states and 57370 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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) [2021-06-05 23:00:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:40,621 INFO L93 Difference]: Finished difference Result 29935 states and 92230 transitions. [2021-06-05 23:00:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:00:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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 45 [2021-06-05 23:00:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:40,668 INFO L225 Difference]: With dead ends: 29935 [2021-06-05 23:00:40,668 INFO L226 Difference]: Without dead ends: 29935 [2021-06-05 23:00:40,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:00:40,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29935 states. [2021-06-05 23:00:40,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29935 to 20625. [2021-06-05 23:00:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20625 states, 20624 states have (on average 3.1061869666408066) internal successors, (64062), 20624 states have internal predecessors, (64062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20625 states to 20625 states and 64062 transitions. [2021-06-05 23:00:41,006 INFO L78 Accepts]: Start accepts. Automaton has 20625 states and 64062 transitions. Word has length 45 [2021-06-05 23:00:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:41,006 INFO L482 AbstractCegarLoop]: Abstraction has 20625 states and 64062 transitions. [2021-06-05 23:00:41,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 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) [2021-06-05 23:00:41,006 INFO L276 IsEmpty]: Start isEmpty. Operand 20625 states and 64062 transitions. [2021-06-05 23:00:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:41,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:41,028 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:41,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:41,229 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash 380212589, now seen corresponding path program 149 times [2021-06-05 23:00:41,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:41,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669830915] [2021-06-05 23:00:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:41,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669830915] [2021-06-05 23:00:41,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669830915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432864060] [2021-06-05 23:00:41,319 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:41,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:00:41,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:41,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:00:41,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:41,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:41,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:41,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:41,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:41,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:9 [2021-06-05 23:00:41,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:41,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:41,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:41,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:41,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:41,509 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-06-05 23:00:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:41,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432864060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:41,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:41,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:00:41,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309303813] [2021-06-05 23:00:41,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:00:41,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:00:41,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:00:41,545 INFO L87 Difference]: Start difference. First operand 20625 states and 64062 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:42,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:42,228 INFO L93 Difference]: Finished difference Result 35863 states and 110465 transitions. [2021-06-05 23:00:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:00:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:00:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:42,292 INFO L225 Difference]: With dead ends: 35863 [2021-06-05 23:00:42,292 INFO L226 Difference]: Without dead ends: 35863 [2021-06-05 23:00:42,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:00:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35863 states. [2021-06-05 23:00:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35863 to 20780. [2021-06-05 23:00:42,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20780 states, 20779 states have (on average 3.106020501467828) internal successors, (64540), 20779 states have internal predecessors, (64540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20780 states to 20780 states and 64540 transitions. [2021-06-05 23:00:42,655 INFO L78 Accepts]: Start accepts. Automaton has 20780 states and 64540 transitions. Word has length 45 [2021-06-05 23:00:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:42,655 INFO L482 AbstractCegarLoop]: Abstraction has 20780 states and 64540 transitions. [2021-06-05 23:00:42,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 20780 states and 64540 transitions. [2021-06-05 23:00:42,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:42,678 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:42,678 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:42,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:42,883 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2033549703, now seen corresponding path program 150 times [2021-06-05 23:00:42,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:42,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111345646] [2021-06-05 23:00:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:42,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:42,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111345646] [2021-06-05 23:00:42,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111345646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:42,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240115525] [2021-06-05 23:00:42,971 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:43,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:00:43,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:43,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:00:43,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:43,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:43,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:00:43,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:43,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:43,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:43,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2021-06-05 23:00:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:43,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:43,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:43,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:43,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:00:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:43,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240115525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:43,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:43,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 23:00:43,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753011293] [2021-06-05 23:00:43,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:00:43,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:43,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:00:43,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:00:43,229 INFO L87 Difference]: Start difference. First operand 20780 states and 64540 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:43,907 INFO L93 Difference]: Finished difference Result 38900 states and 119843 transitions. [2021-06-05 23:00:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:00:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:00:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:43,967 INFO L225 Difference]: With dead ends: 38900 [2021-06-05 23:00:43,967 INFO L226 Difference]: Without dead ends: 38900 [2021-06-05 23:00:43,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:00:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38900 states. [2021-06-05 23:00:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38900 to 22864. [2021-06-05 23:00:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22864 states, 22863 states have (on average 3.1030048550059046) internal successors, (70944), 22863 states have internal predecessors, (70944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22864 states to 22864 states and 70944 transitions. [2021-06-05 23:00:44,547 INFO L78 Accepts]: Start accepts. Automaton has 22864 states and 70944 transitions. Word has length 45 [2021-06-05 23:00:44,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:44,547 INFO L482 AbstractCegarLoop]: Abstraction has 22864 states and 70944 transitions. [2021-06-05 23:00:44,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:44,547 INFO L276 IsEmpty]: Start isEmpty. Operand 22864 states and 70944 transitions. [2021-06-05 23:00:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:44,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:44,573 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:44,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 23:00:44,774 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1975277079, now seen corresponding path program 151 times [2021-06-05 23:00:44,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:44,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944264906] [2021-06-05 23:00:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:00:44,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944264906] [2021-06-05 23:00:44,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944264906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:44,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613442930] [2021-06-05 23:00:44,869 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:44,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:00:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:44,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 23:00:44,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:44,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:44,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:44,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 23:00:44,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:44,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:44,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:44,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:44,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 23:00:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:00:45,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613442930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:45,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:45,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 23:00:45,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849598261] [2021-06-05 23:00:45,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:00:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:00:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:00:45,019 INFO L87 Difference]: Start difference. First operand 22864 states and 70944 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:45,546 INFO L93 Difference]: Finished difference Result 41349 states and 126699 transitions. [2021-06-05 23:00:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:00:45,547 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:00:45,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:45,610 INFO L225 Difference]: With dead ends: 41349 [2021-06-05 23:00:45,610 INFO L226 Difference]: Without dead ends: 41323 [2021-06-05 23:00:45,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=244, Invalid=1088, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:00:45,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41323 states. [2021-06-05 23:00:45,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41323 to 22913. [2021-06-05 23:00:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22913 states, 22912 states have (on average 3.0903456703910615) internal successors, (70806), 22912 states have internal predecessors, (70806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22913 states to 22913 states and 70806 transitions. [2021-06-05 23:00:46,033 INFO L78 Accepts]: Start accepts. Automaton has 22913 states and 70806 transitions. Word has length 45 [2021-06-05 23:00:46,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:46,033 INFO L482 AbstractCegarLoop]: Abstraction has 22913 states and 70806 transitions. [2021-06-05 23:00:46,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:46,033 INFO L276 IsEmpty]: Start isEmpty. Operand 22913 states and 70806 transitions. [2021-06-05 23:00:46,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:46,058 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:46,058 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:46,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:46,258 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash 990578203, now seen corresponding path program 152 times [2021-06-05 23:00:46,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:46,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672974060] [2021-06-05 23:00:46,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:46,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672974060] [2021-06-05 23:00:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672974060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331894373] [2021-06-05 23:00:46,350 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:46,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:00:46,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:46,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:00:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:46,637 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 23:00:46,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 23:00:46,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:46,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:46,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:46,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:10 [2021-06-05 23:00:46,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:46,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:00:46,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:46,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:46,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:46,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-06-05 23:00:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:46,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331894373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:46,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:46,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:00:46,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387082209] [2021-06-05 23:00:46,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:00:46,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:46,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:00:46,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:00:46,754 INFO L87 Difference]: Start difference. First operand 22913 states and 70806 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:47,629 INFO L93 Difference]: Finished difference Result 45655 states and 139694 transitions. [2021-06-05 23:00:47,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:00:47,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:00:47,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:47,704 INFO L225 Difference]: With dead ends: 45655 [2021-06-05 23:00:47,704 INFO L226 Difference]: Without dead ends: 45655 [2021-06-05 23:00:47,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:00:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45655 states. [2021-06-05 23:00:48,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45655 to 23273. [2021-06-05 23:00:48,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23273 states, 23272 states have (on average 3.08903403231351) internal successors, (71888), 23272 states have internal predecessors, (71888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23273 states to 23273 states and 71888 transitions. [2021-06-05 23:00:48,185 INFO L78 Accepts]: Start accepts. Automaton has 23273 states and 71888 transitions. Word has length 45 [2021-06-05 23:00:48,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:48,185 INFO L482 AbstractCegarLoop]: Abstraction has 23273 states and 71888 transitions. [2021-06-05 23:00:48,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:48,185 INFO L276 IsEmpty]: Start isEmpty. Operand 23273 states and 71888 transitions. [2021-06-05 23:00:48,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:48,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:48,210 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:48,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 23:00:48,428 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:48,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2073054145, now seen corresponding path program 153 times [2021-06-05 23:00:48,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:48,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380964785] [2021-06-05 23:00:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:48,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:48,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380964785] [2021-06-05 23:00:48,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380964785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:48,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130141421] [2021-06-05 23:00:48,531 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:48,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:00:48,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:48,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:00:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:48,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:48,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:48,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:48,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:48,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 23:00:48,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:48,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 23:00:48,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:48,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:48,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:48,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-06-05 23:00:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:48,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130141421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:48,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:48,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 23:00:48,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134518830] [2021-06-05 23:00:48,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:00:48,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:48,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:00:48,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:00:48,731 INFO L87 Difference]: Start difference. First operand 23273 states and 71888 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:50,390 INFO L93 Difference]: Finished difference Result 52888 states and 162151 transitions. [2021-06-05 23:00:50,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:00:50,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:00:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:50,482 INFO L225 Difference]: With dead ends: 52888 [2021-06-05 23:00:50,483 INFO L226 Difference]: Without dead ends: 52888 [2021-06-05 23:00:50,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 864.8ms TimeCoverageRelationStatistics Valid=612, Invalid=3810, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:00:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52888 states. [2021-06-05 23:00:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52888 to 28583. [2021-06-05 23:00:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28583 states, 28582 states have (on average 3.1288923098453574) internal successors, (89430), 28582 states have internal predecessors, (89430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28583 states to 28583 states and 89430 transitions. [2021-06-05 23:00:51,211 INFO L78 Accepts]: Start accepts. Automaton has 28583 states and 89430 transitions. Word has length 45 [2021-06-05 23:00:51,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:51,211 INFO L482 AbstractCegarLoop]: Abstraction has 28583 states and 89430 transitions. [2021-06-05 23:00:51,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 28583 states and 89430 transitions. [2021-06-05 23:00:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 23:00:51,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:51,238 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:51,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:51,438 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:51,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:51,439 INFO L82 PathProgramCache]: Analyzing trace with hash -568576037, now seen corresponding path program 154 times [2021-06-05 23:00:51,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:51,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019050584] [2021-06-05 23:00:51,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:51,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:51,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019050584] [2021-06-05 23:00:51,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019050584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:51,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608233531] [2021-06-05 23:00:51,523 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:51,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:00:51,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:00:51,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:51,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 23:00:51,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:51,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:51,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:51,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:14 [2021-06-05 23:00:51,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:51,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:00:51,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:51,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:51,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:51,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-06-05 23:00:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:00:51,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608233531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:51,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:51,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 23:00:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502157030] [2021-06-05 23:00:51,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:00:51,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:00:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:00:51,735 INFO L87 Difference]: Start difference. First operand 28583 states and 89430 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:00:52,281 INFO L93 Difference]: Finished difference Result 42516 states and 131719 transitions. [2021-06-05 23:00:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:00:52,281 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 23:00:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:00:52,348 INFO L225 Difference]: With dead ends: 42516 [2021-06-05 23:00:52,349 INFO L226 Difference]: Without dead ends: 42516 [2021-06-05 23:00:52,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:00:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42516 states. [2021-06-05 23:00:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42516 to 29181. [2021-06-05 23:00:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29181 states, 29180 states have (on average 3.1281014393420152) internal successors, (91278), 29180 states have internal predecessors, (91278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29181 states to 29181 states and 91278 transitions. [2021-06-05 23:00:53,004 INFO L78 Accepts]: Start accepts. Automaton has 29181 states and 91278 transitions. Word has length 45 [2021-06-05 23:00:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:00:53,004 INFO L482 AbstractCegarLoop]: Abstraction has 29181 states and 91278 transitions. [2021-06-05 23:00:53,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:00:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 29181 states and 91278 transitions. [2021-06-05 23:00:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:00:53,029 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:00:53,029 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:00:53,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 23:00:53,229 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:00:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:00:53,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1260994688, now seen corresponding path program 155 times [2021-06-05 23:00:53,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:00:53,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943390355] [2021-06-05 23:00:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:00:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:00:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:54,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:00:54,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943390355] [2021-06-05 23:00:54,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943390355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:54,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289647634] [2021-06-05 23:00:54,003 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:00:54,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:00:54,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:00:54,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 67 conjunts are in the unsatisfiable core [2021-06-05 23:00:54,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:00:55,022 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:00:55,022 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 64 treesize of output 36 [2021-06-05 23:00:55,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:55,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:55,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:55,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:44 [2021-06-05 23:00:55,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:00:55,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:55,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:00:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:00:55,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:00:55,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:00:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:00:55,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:55,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 23:00:55,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2021-06-05 23:00:55,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:00:55,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:00:55,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:00:55,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:17 [2021-06-05 23:00:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:00:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289647634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:00:55,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:00:55,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 51 [2021-06-05 23:00:55,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571554868] [2021-06-05 23:00:55,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-06-05 23:00:55,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:00:55,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-06-05 23:00:55,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2444, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:00:55,313 INFO L87 Difference]: Start difference. First operand 29181 states and 91278 transitions. Second operand has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:01,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:01,255 INFO L93 Difference]: Finished difference Result 38093 states and 116808 transitions. [2021-06-05 23:01:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:01:01,255 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:01,312 INFO L225 Difference]: With dead ends: 38093 [2021-06-05 23:01:01,312 INFO L226 Difference]: Without dead ends: 37939 [2021-06-05 23:01:01,313 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4218 ImplicationChecksByTransitivity, 4834.7ms TimeCoverageRelationStatistics Valid=1187, Invalid=13093, Unknown=0, NotChecked=0, Total=14280 [2021-06-05 23:01:01,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37939 states. [2021-06-05 23:01:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37939 to 30032. [2021-06-05 23:01:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30032 states, 30031 states have (on average 3.11737870866771) internal successors, (93618), 30031 states have internal predecessors, (93618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30032 states to 30032 states and 93618 transitions. [2021-06-05 23:01:01,848 INFO L78 Accepts]: Start accepts. Automaton has 30032 states and 93618 transitions. Word has length 49 [2021-06-05 23:01:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:01,848 INFO L482 AbstractCegarLoop]: Abstraction has 30032 states and 93618 transitions. [2021-06-05 23:01:01,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 51 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 30032 states and 93618 transitions. [2021-06-05 23:01:01,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:01,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:01,874 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:02,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:02,074 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash 253154590, now seen corresponding path program 156 times [2021-06-05 23:01:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:02,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920435271] [2021-06-05 23:01:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:02,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:02,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920435271] [2021-06-05 23:01:02,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920435271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:02,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733776262] [2021-06-05 23:01:02,650 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:02,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:01:02,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:02,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:01:02,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:03,449 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:03,449 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 52 treesize of output 32 [2021-06-05 23:01:03,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:03,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:03,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:03,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:57 [2021-06-05 23:01:03,568 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:03,568 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 63 treesize of output 31 [2021-06-05 23:01:03,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:03,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:03,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:03,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 [2021-06-05 23:01:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:03,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733776262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:03,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:03,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 23:01:03,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582578170] [2021-06-05 23:01:03,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 23:01:03,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:03,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 23:01:03,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2190, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:01:03,779 INFO L87 Difference]: Start difference. First operand 30032 states and 93618 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:09,190 INFO L93 Difference]: Finished difference Result 38512 states and 118020 transitions. [2021-06-05 23:01:09,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:01:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:09,250 INFO L225 Difference]: With dead ends: 38512 [2021-06-05 23:01:09,250 INFO L226 Difference]: Without dead ends: 38358 [2021-06-05 23:01:09,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2833 ImplicationChecksByTransitivity, 4165.2ms TimeCoverageRelationStatistics Valid=880, Invalid=10250, Unknown=0, NotChecked=0, Total=11130 [2021-06-05 23:01:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38358 states. [2021-06-05 23:01:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38358 to 30098. [2021-06-05 23:01:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30098 states, 30097 states have (on average 3.1170880818686246) internal successors, (93815), 30097 states have internal predecessors, (93815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30098 states to 30098 states and 93815 transitions. [2021-06-05 23:01:09,767 INFO L78 Accepts]: Start accepts. Automaton has 30098 states and 93815 transitions. Word has length 49 [2021-06-05 23:01:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:09,767 INFO L482 AbstractCegarLoop]: Abstraction has 30098 states and 93815 transitions. [2021-06-05 23:01:09,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 30098 states and 93815 transitions. [2021-06-05 23:01:09,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:09,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:09,793 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:09,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:09,997 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:09,997 INFO L82 PathProgramCache]: Analyzing trace with hash -175606438, now seen corresponding path program 157 times [2021-06-05 23:01:09,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:09,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779423919] [2021-06-05 23:01:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:10,589 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:10,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:10,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779423919] [2021-06-05 23:01:10,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779423919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:10,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123575894] [2021-06-05 23:01:10,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:10,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:01:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:11,370 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:11,371 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 51 treesize of output 27 [2021-06-05 23:01:11,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:11,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:11,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:11,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:48 [2021-06-05 23:01:11,713 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:11,713 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 26 [2021-06-05 23:01:11,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:11,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:11,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:11,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 23:01:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:11,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123575894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:11,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:11,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 23:01:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016175401] [2021-06-05 23:01:11,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 23:01:11,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 23:01:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:01:11,985 INFO L87 Difference]: Start difference. First operand 30098 states and 93815 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:16,388 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2021-06-05 23:01:19,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:19,825 INFO L93 Difference]: Finished difference Result 40431 states and 123594 transitions. [2021-06-05 23:01:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 23:01:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:19,889 INFO L225 Difference]: With dead ends: 40431 [2021-06-05 23:01:19,889 INFO L226 Difference]: Without dead ends: 40212 [2021-06-05 23:01:19,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3736 ImplicationChecksByTransitivity, 5675.4ms TimeCoverageRelationStatistics Valid=1040, Invalid=14212, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 23:01:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40212 states. [2021-06-05 23:01:20,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40212 to 30553. [2021-06-05 23:01:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30553 states, 30552 states have (on average 3.1129549620319454) internal successors, (95107), 30552 states have internal predecessors, (95107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30553 states to 30553 states and 95107 transitions. [2021-06-05 23:01:20,468 INFO L78 Accepts]: Start accepts. Automaton has 30553 states and 95107 transitions. Word has length 49 [2021-06-05 23:01:20,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:20,468 INFO L482 AbstractCegarLoop]: Abstraction has 30553 states and 95107 transitions. [2021-06-05 23:01:20,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:20,469 INFO L276 IsEmpty]: Start isEmpty. Operand 30553 states and 95107 transitions. [2021-06-05 23:01:20,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:20,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:20,496 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:20,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:20,697 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:20,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1520699802, now seen corresponding path program 158 times [2021-06-05 23:01:20,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:20,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759546888] [2021-06-05 23:01:20,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:21,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:21,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759546888] [2021-06-05 23:01:21,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759546888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:21,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588704772] [2021-06-05 23:01:21,251 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:21,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:01:21,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:21,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:01:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:21,863 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:21,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:01:21,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:21,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:21,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:21,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 23:01:22,027 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:22,027 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 56 treesize of output 28 [2021-06-05 23:01:22,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:22,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:22,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:22,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:17 [2021-06-05 23:01:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:22,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588704772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:22,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:22,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 23:01:22,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539327989] [2021-06-05 23:01:22,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 23:01:22,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:22,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 23:01:22,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:01:22,273 INFO L87 Difference]: Start difference. First operand 30553 states and 95107 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:26,230 INFO L93 Difference]: Finished difference Result 31964 states and 99056 transitions. [2021-06-05 23:01:26,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:01:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:26,282 INFO L225 Difference]: With dead ends: 31964 [2021-06-05 23:01:26,282 INFO L226 Difference]: Without dead ends: 31798 [2021-06-05 23:01:26,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1091 ImplicationChecksByTransitivity, 2732.1ms TimeCoverageRelationStatistics Valid=302, Invalid=5550, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:01:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31798 states. [2021-06-05 23:01:26,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31798 to 30683. [2021-06-05 23:01:26,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30683 states, 30682 states have (on average 3.1108793429372272) internal successors, (95448), 30682 states have internal predecessors, (95448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30683 states to 30683 states and 95448 transitions. [2021-06-05 23:01:26,734 INFO L78 Accepts]: Start accepts. Automaton has 30683 states and 95448 transitions. Word has length 49 [2021-06-05 23:01:26,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:26,734 INFO L482 AbstractCegarLoop]: Abstraction has 30683 states and 95448 transitions. [2021-06-05 23:01:26,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:26,734 INFO L276 IsEmpty]: Start isEmpty. Operand 30683 states and 95448 transitions. [2021-06-05 23:01:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:26,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:26,760 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:26,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-05 23:01:26,961 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:26,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:26,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1919970444, now seen corresponding path program 159 times [2021-06-05 23:01:26,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:26,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927656624] [2021-06-05 23:01:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:27,490 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 21 [2021-06-05 23:01:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:27,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:27,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927656624] [2021-06-05 23:01:27,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927656624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:27,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377624891] [2021-06-05 23:01:27,707 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:27,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:01:27,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:01:27,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:28,358 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:28,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:01:28,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:28,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:28,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:28,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 23:01:28,660 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:28,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 24 [2021-06-05 23:01:28,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:28,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:28,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:28,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:20 [2021-06-05 23:01:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:28,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377624891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:28,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:28,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 23:01:28,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976050128] [2021-06-05 23:01:28,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 23:01:28,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:28,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 23:01:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2605, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:01:28,911 INFO L87 Difference]: Start difference. First operand 30683 states and 95448 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:35,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:35,591 INFO L93 Difference]: Finished difference Result 40926 states and 125101 transitions. [2021-06-05 23:01:35,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:01:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:35,658 INFO L225 Difference]: With dead ends: 40926 [2021-06-05 23:01:35,658 INFO L226 Difference]: Without dead ends: 40707 [2021-06-05 23:01:35,659 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 4959.8ms TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2021-06-05 23:01:35,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40707 states. [2021-06-05 23:01:36,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40707 to 30659. [2021-06-05 23:01:36,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30659 states, 30658 states have (on average 3.1109987605192773) internal successors, (95377), 30658 states have internal predecessors, (95377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30659 states to 30659 states and 95377 transitions. [2021-06-05 23:01:36,292 INFO L78 Accepts]: Start accepts. Automaton has 30659 states and 95377 transitions. Word has length 49 [2021-06-05 23:01:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:36,293 INFO L482 AbstractCegarLoop]: Abstraction has 30659 states and 95377 transitions. [2021-06-05 23:01:36,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30659 states and 95377 transitions. [2021-06-05 23:01:36,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:36,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:36,322 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:36,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 23:01:36,538 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:36,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:36,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1339815556, now seen corresponding path program 160 times [2021-06-05 23:01:36,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:36,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39767902] [2021-06-05 23:01:36,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:37,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:37,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39767902] [2021-06-05 23:01:37,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39767902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:37,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326796206] [2021-06-05 23:01:37,166 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:37,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:01:37,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:01:37,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:38,020 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:38,020 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 51 treesize of output 27 [2021-06-05 23:01:38,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:38,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:38,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:38,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:85, output treesize:48 [2021-06-05 23:01:38,376 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:38,376 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 26 [2021-06-05 23:01:38,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:38,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:38,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:38,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 23:01:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:38,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326796206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:38,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:38,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 23:01:38,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502737581] [2021-06-05 23:01:38,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 23:01:38,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:38,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 23:01:38,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2828, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:01:38,666 INFO L87 Difference]: Start difference. First operand 30659 states and 95377 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:39,399 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 23 [2021-06-05 23:01:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:46,319 INFO L93 Difference]: Finished difference Result 41025 states and 125405 transitions. [2021-06-05 23:01:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 23:01:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:46,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:46,391 INFO L225 Difference]: With dead ends: 41025 [2021-06-05 23:01:46,391 INFO L226 Difference]: Without dead ends: 40806 [2021-06-05 23:01:46,392 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 5658.6ms TimeCoverageRelationStatistics Valid=937, Invalid=14563, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 23:01:46,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40806 states. [2021-06-05 23:01:46,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40806 to 30588. [2021-06-05 23:01:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30588 states, 30587 states have (on average 3.111419884264557) internal successors, (95169), 30587 states have internal predecessors, (95169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30588 states to 30588 states and 95169 transitions. [2021-06-05 23:01:46,928 INFO L78 Accepts]: Start accepts. Automaton has 30588 states and 95169 transitions. Word has length 49 [2021-06-05 23:01:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:46,928 INFO L482 AbstractCegarLoop]: Abstraction has 30588 states and 95169 transitions. [2021-06-05 23:01:46,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 30588 states and 95169 transitions. [2021-06-05 23:01:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:46,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:46,957 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:47,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 23:01:47,173 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1177810326, now seen corresponding path program 161 times [2021-06-05 23:01:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:47,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465404448] [2021-06-05 23:01:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:47,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:47,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465404448] [2021-06-05 23:01:47,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465404448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:47,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285365793] [2021-06-05 23:01:47,780 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:47,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:01:47,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 23:01:47,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:48,341 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-06-05 23:01:48,518 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:48,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:01:48,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:48,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:48,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:48,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 23:01:48,674 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:48,674 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 41 treesize of output 21 [2021-06-05 23:01:48,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:48,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:48,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:48,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:17 [2021-06-05 23:01:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:48,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285365793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:48,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:48,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 50 [2021-06-05 23:01:48,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531171651] [2021-06-05 23:01:48,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:01:48,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:01:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:01:48,893 INFO L87 Difference]: Start difference. First operand 30588 states and 95169 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:54,138 INFO L93 Difference]: Finished difference Result 41262 states and 126100 transitions. [2021-06-05 23:01:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 23:01:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:54,205 INFO L225 Difference]: With dead ends: 41262 [2021-06-05 23:01:54,205 INFO L226 Difference]: Without dead ends: 41043 [2021-06-05 23:01:54,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3035 ImplicationChecksByTransitivity, 3662.2ms TimeCoverageRelationStatistics Valid=788, Invalid=10132, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 23:01:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41043 states. [2021-06-05 23:01:54,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41043 to 30615. [2021-06-05 23:01:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30615 states, 30614 states have (on average 3.1114849415300188) internal successors, (95255), 30614 states have internal predecessors, (95255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30615 states to 30615 states and 95255 transitions. [2021-06-05 23:01:54,737 INFO L78 Accepts]: Start accepts. Automaton has 30615 states and 95255 transitions. Word has length 49 [2021-06-05 23:01:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:54,737 INFO L482 AbstractCegarLoop]: Abstraction has 30615 states and 95255 transitions. [2021-06-05 23:01:54,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 30615 states and 95255 transitions. [2021-06-05 23:01:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:54,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:54,764 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:54,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:54,965 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:54,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:54,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1420850730, now seen corresponding path program 162 times [2021-06-05 23:01:54,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:54,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893918265] [2021-06-05 23:01:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:55,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:55,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893918265] [2021-06-05 23:01:55,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893918265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:55,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500366390] [2021-06-05 23:01:55,486 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:55,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:01:55,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:01:55,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:01:55,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:01:56,207 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:56,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:01:56,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:56,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:56,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:56,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:50 [2021-06-05 23:01:56,374 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:01:56,375 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 51 treesize of output 27 [2021-06-05 23:01:56,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:01:56,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:01:56,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:01:56,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 23:01:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:56,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500366390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:56,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:01:56,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 23:01:56,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099766165] [2021-06-05 23:01:56,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 23:01:56,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:01:56,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 23:01:56,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:01:56,511 INFO L87 Difference]: Start difference. First operand 30615 states and 95255 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:01:58,616 INFO L93 Difference]: Finished difference Result 31062 states and 96409 transitions. [2021-06-05 23:01:58,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:01:58,616 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:01:58,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:01:58,664 INFO L225 Difference]: With dead ends: 31062 [2021-06-05 23:01:58,664 INFO L226 Difference]: Without dead ends: 30998 [2021-06-05 23:01:58,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2100.5ms TimeCoverageRelationStatistics Valid=247, Invalid=4175, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 23:01:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30998 states. [2021-06-05 23:01:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30998 to 30615. [2021-06-05 23:01:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30615 states, 30614 states have (on average 3.1114849415300188) internal successors, (95255), 30614 states have internal predecessors, (95255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30615 states to 30615 states and 95255 transitions. [2021-06-05 23:01:59,080 INFO L78 Accepts]: Start accepts. Automaton has 30615 states and 95255 transitions. Word has length 49 [2021-06-05 23:01:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:01:59,080 INFO L482 AbstractCegarLoop]: Abstraction has 30615 states and 95255 transitions. [2021-06-05 23:01:59,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:01:59,080 INFO L276 IsEmpty]: Start isEmpty. Operand 30615 states and 95255 transitions. [2021-06-05 23:01:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:01:59,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:01:59,106 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:01:59,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:59,306 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:01:59,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:01:59,306 INFO L82 PathProgramCache]: Analyzing trace with hash 660848806, now seen corresponding path program 163 times [2021-06-05 23:01:59,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:01:59,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331081710] [2021-06-05 23:01:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:01:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:01:59,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:01:59,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331081710] [2021-06-05 23:01:59,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331081710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:01:59,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426885325] [2021-06-05 23:01:59,868 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:01:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:01:59,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:01:59,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:00,856 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:00,856 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 51 treesize of output 27 [2021-06-05 23:02:00,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:00,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:00,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:00,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:54 [2021-06-05 23:02:00,997 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:00,998 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 26 [2021-06-05 23:02:00,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:01,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:01,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:01,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 23:02:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:01,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426885325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:01,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:01,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 53 [2021-06-05 23:02:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852635798] [2021-06-05 23:02:01,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-06-05 23:02:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:01,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-06-05 23:02:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2722, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:02:01,276 INFO L87 Difference]: Start difference. First operand 30615 states and 95255 transitions. Second operand has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:08,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:08,820 INFO L93 Difference]: Finished difference Result 39956 states and 122260 transitions. [2021-06-05 23:02:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 23:02:08,821 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:02:08,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:08,882 INFO L225 Difference]: With dead ends: 39956 [2021-06-05 23:02:08,883 INFO L226 Difference]: Without dead ends: 39737 [2021-06-05 23:02:08,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 5276.6ms TimeCoverageRelationStatistics Valid=905, Invalid=11977, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 23:02:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39737 states. [2021-06-05 23:02:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39737 to 30942. [2021-06-05 23:02:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30942 states, 30941 states have (on average 3.1104036715038297) internal successors, (96239), 30941 states have internal predecessors, (96239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30942 states to 30942 states and 96239 transitions. [2021-06-05 23:02:09,389 INFO L78 Accepts]: Start accepts. Automaton has 30942 states and 96239 transitions. Word has length 49 [2021-06-05 23:02:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:09,389 INFO L482 AbstractCegarLoop]: Abstraction has 30942 states and 96239 transitions. [2021-06-05 23:02:09,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 1.7962962962962963) internal successors, (97), 53 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 30942 states and 96239 transitions. [2021-06-05 23:02:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:02:09,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:09,415 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:09,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:09,615 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:09,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:09,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1937812250, now seen corresponding path program 164 times [2021-06-05 23:02:09,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:09,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321243583] [2021-06-05 23:02:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:10,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:10,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321243583] [2021-06-05 23:02:10,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321243583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:10,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118643369] [2021-06-05 23:02:10,271 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:10,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:02:10,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:10,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:02:10,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:10,891 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:10,891 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 51 treesize of output 31 [2021-06-05 23:02:10,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:10,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:10,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:10,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:40 [2021-06-05 23:02:10,995 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:10,995 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 41 treesize of output 21 [2021-06-05 23:02:10,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:11,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:11,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:11,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:17 [2021-06-05 23:02:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:11,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118643369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:11,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:11,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 47 [2021-06-05 23:02:11,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082782678] [2021-06-05 23:02:11,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-06-05 23:02:11,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:11,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-06-05 23:02:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:02:11,227 INFO L87 Difference]: Start difference. First operand 30942 states and 96239 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:15,288 INFO L93 Difference]: Finished difference Result 32263 states and 99913 transitions. [2021-06-05 23:02:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:02:15,288 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:02:15,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:15,344 INFO L225 Difference]: With dead ends: 32263 [2021-06-05 23:02:15,344 INFO L226 Difference]: Without dead ends: 32112 [2021-06-05 23:02:15,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2709.0ms TimeCoverageRelationStatistics Valid=311, Invalid=5541, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 23:02:15,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32112 states. [2021-06-05 23:02:15,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32112 to 31041. [2021-06-05 23:02:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31041 states, 31040 states have (on average 3.1089884020618554) internal successors, (96503), 31040 states have internal predecessors, (96503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31041 states to 31041 states and 96503 transitions. [2021-06-05 23:02:15,925 INFO L78 Accepts]: Start accepts. Automaton has 31041 states and 96503 transitions. Word has length 49 [2021-06-05 23:02:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:15,925 INFO L482 AbstractCegarLoop]: Abstraction has 31041 states and 96503 transitions. [2021-06-05 23:02:15,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 31041 states and 96503 transitions. [2021-06-05 23:02:15,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:02:15,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:15,951 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:16,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 23:02:16,152 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 232087778, now seen corresponding path program 165 times [2021-06-05 23:02:16,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:16,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084880490] [2021-06-05 23:02:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:16,731 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:16,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084880490] [2021-06-05 23:02:16,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084880490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587823544] [2021-06-05 23:02:16,732 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:16,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:02:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:02:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:17,357 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:17,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:02:17,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:17,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:17,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:17,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:43 [2021-06-05 23:02:17,643 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:17,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2021-06-05 23:02:17,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:17,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:17,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:17,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 23:02:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:17,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587823544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:17,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:17,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 23:02:17,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282475509] [2021-06-05 23:02:17,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 23:02:17,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 23:02:17,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2606, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:02:17,891 INFO L87 Difference]: Start difference. First operand 31041 states and 96503 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:24,777 INFO L93 Difference]: Finished difference Result 41561 states and 126826 transitions. [2021-06-05 23:02:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 23:02:24,778 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:02:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:24,835 INFO L225 Difference]: With dead ends: 41561 [2021-06-05 23:02:24,835 INFO L226 Difference]: Without dead ends: 41342 [2021-06-05 23:02:24,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 4905.8ms TimeCoverageRelationStatistics Valid=1056, Invalid=13706, Unknown=0, NotChecked=0, Total=14762 [2021-06-05 23:02:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41342 states. [2021-06-05 23:02:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41342 to 31141. [2021-06-05 23:02:25,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31141 states, 31140 states have (on average 3.1085420680796405) internal successors, (96800), 31140 states have internal predecessors, (96800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31141 states to 31141 states and 96800 transitions. [2021-06-05 23:02:25,333 INFO L78 Accepts]: Start accepts. Automaton has 31141 states and 96800 transitions. Word has length 49 [2021-06-05 23:02:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:25,333 INFO L482 AbstractCegarLoop]: Abstraction has 31141 states and 96800 transitions. [2021-06-05 23:02:25,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 31141 states and 96800 transitions. [2021-06-05 23:02:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:02:25,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:25,360 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:25,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 23:02:25,560 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:25,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:25,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1928394018, now seen corresponding path program 166 times [2021-06-05 23:02:25,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:25,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330049604] [2021-06-05 23:02:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:26,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:26,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330049604] [2021-06-05 23:02:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330049604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:26,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191359401] [2021-06-05 23:02:26,109 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:26,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:02:26,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:26,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 23:02:26,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:26,713 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:26,714 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 79 treesize of output 51 [2021-06-05 23:02:26,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:26,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:26,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:26,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:96, output treesize:55 [2021-06-05 23:02:27,012 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:27,012 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 49 treesize of output 25 [2021-06-05 23:02:27,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:27,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:27,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:27,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:20 [2021-06-05 23:02:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:27,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191359401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:27,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:27,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 23:02:27,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122065553] [2021-06-05 23:02:27,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:02:27,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:27,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:02:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2435, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:02:27,307 INFO L87 Difference]: Start difference. First operand 31141 states and 96800 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:30,271 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-06-05 23:02:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:32,686 INFO L93 Difference]: Finished difference Result 32160 states and 99576 transitions. [2021-06-05 23:02:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:02:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:02:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:32,736 INFO L225 Difference]: With dead ends: 32160 [2021-06-05 23:02:32,736 INFO L226 Difference]: Without dead ends: 32023 [2021-06-05 23:02:32,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 3436.2ms TimeCoverageRelationStatistics Valid=328, Invalid=6644, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:02:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32023 states. [2021-06-05 23:02:33,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32023 to 31164. [2021-06-05 23:02:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31164 states, 31163 states have (on average 3.108365690081186) internal successors, (96866), 31163 states have internal predecessors, (96866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:33,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31164 states to 31164 states and 96866 transitions. [2021-06-05 23:02:33,180 INFO L78 Accepts]: Start accepts. Automaton has 31164 states and 96866 transitions. Word has length 49 [2021-06-05 23:02:33,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:33,180 INFO L482 AbstractCegarLoop]: Abstraction has 31164 states and 96866 transitions. [2021-06-05 23:02:33,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:33,180 INFO L276 IsEmpty]: Start isEmpty. Operand 31164 states and 96866 transitions. [2021-06-05 23:02:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:02:33,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:33,214 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:33,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-05 23:02:33,414 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash 184030012, now seen corresponding path program 167 times [2021-06-05 23:02:33,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:33,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333376131] [2021-06-05 23:02:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:33,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:33,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333376131] [2021-06-05 23:02:33,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333376131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:33,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500414497] [2021-06-05 23:02:33,955 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:33,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:02:33,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:33,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-05 23:02:33,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:34,792 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 23:02:34,871 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:34,872 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 65 treesize of output 41 [2021-06-05 23:02:34,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:34,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:34,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:34,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:56 [2021-06-05 23:02:35,066 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:35,067 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 61 treesize of output 29 [2021-06-05 23:02:35,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:35,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:35,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:35,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:20 [2021-06-05 23:02:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:35,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500414497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:35,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:35,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 23:02:35,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228925184] [2021-06-05 23:02:35,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:02:35,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:35,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:02:35,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2430, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:02:35,341 INFO L87 Difference]: Start difference. First operand 31164 states and 96866 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:40,440 INFO L93 Difference]: Finished difference Result 32496 states and 100529 transitions. [2021-06-05 23:02:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 23:02:40,440 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:02:40,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:40,491 INFO L225 Difference]: With dead ends: 32496 [2021-06-05 23:02:40,491 INFO L226 Difference]: Without dead ends: 32345 [2021-06-05 23:02:40,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3569.6ms TimeCoverageRelationStatistics Valid=344, Invalid=6796, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 23:02:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32345 states. [2021-06-05 23:02:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32345 to 31242. [2021-06-05 23:02:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31242 states, 31241 states have (on average 3.1072628917128133) internal successors, (97074), 31241 states have internal predecessors, (97074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:40,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31242 states to 31242 states and 97074 transitions. [2021-06-05 23:02:40,995 INFO L78 Accepts]: Start accepts. Automaton has 31242 states and 97074 transitions. Word has length 49 [2021-06-05 23:02:40,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:40,995 INFO L482 AbstractCegarLoop]: Abstraction has 31242 states and 97074 transitions. [2021-06-05 23:02:40,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 31242 states and 97074 transitions. [2021-06-05 23:02:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:02:41,027 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:41,027 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:41,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:41,227 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:41,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:41,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1585504542, now seen corresponding path program 168 times [2021-06-05 23:02:41,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:41,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833803528] [2021-06-05 23:02:41,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:41,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:41,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833803528] [2021-06-05 23:02:41,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833803528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:41,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826295144] [2021-06-05 23:02:41,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:41,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:02:41,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:02:41,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:02:41,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:42,571 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:02:42,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:42,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:42,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:42,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:82, output treesize:50 [2021-06-05 23:02:42,754 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:42,754 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 51 treesize of output 27 [2021-06-05 23:02:42,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:42,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:42,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:42,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:20 [2021-06-05 23:02:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:42,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826295144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:42,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:42,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 50 [2021-06-05 23:02:42,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527415768] [2021-06-05 23:02:42,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:02:42,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:02:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2387, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:02:42,901 INFO L87 Difference]: Start difference. First operand 31242 states and 97074 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:48,949 INFO L93 Difference]: Finished difference Result 41173 states and 125718 transitions. [2021-06-05 23:02:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:02:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:02:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:49,011 INFO L225 Difference]: With dead ends: 41173 [2021-06-05 23:02:49,012 INFO L226 Difference]: Without dead ends: 41012 [2021-06-05 23:02:49,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2902 ImplicationChecksByTransitivity, 4277.9ms TimeCoverageRelationStatistics Valid=796, Invalid=10976, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:02:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41012 states. [2021-06-05 23:02:49,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41012 to 31230. [2021-06-05 23:02:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31230 states, 31229 states have (on average 3.10743219443466) internal successors, (97042), 31229 states have internal predecessors, (97042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31230 states to 31230 states and 97042 transitions. [2021-06-05 23:02:49,527 INFO L78 Accepts]: Start accepts. Automaton has 31230 states and 97042 transitions. Word has length 49 [2021-06-05 23:02:49,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:49,527 INFO L482 AbstractCegarLoop]: Abstraction has 31230 states and 97042 transitions. [2021-06-05 23:02:49,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 31230 states and 97042 transitions. [2021-06-05 23:02:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:02:49,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:49,560 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:49,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:49,760 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1972464768, now seen corresponding path program 169 times [2021-06-05 23:02:49,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:49,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908778031] [2021-06-05 23:02:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:50,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:02:50,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908778031] [2021-06-05 23:02:50,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908778031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:50,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197396905] [2021-06-05 23:02:50,330 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:02:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:02:50,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:02:50,592 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 23:02:51,179 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:51,179 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 51 treesize of output 27 [2021-06-05 23:02:51,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:51,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:51,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:51,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:43 [2021-06-05 23:02:51,569 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:02:51,570 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 26 [2021-06-05 23:02:51,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:02:51,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:02:51,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:02:51,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 23:02:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:02:51,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197396905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:02:51,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:02:51,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 23:02:51,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391645326] [2021-06-05 23:02:51,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 23:02:51,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:02:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 23:02:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:02:51,841 INFO L87 Difference]: Start difference. First operand 31230 states and 97042 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:02:58,781 INFO L93 Difference]: Finished difference Result 40170 states and 122842 transitions. [2021-06-05 23:02:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 23:02:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:02:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:02:58,842 INFO L225 Difference]: With dead ends: 40170 [2021-06-05 23:02:58,842 INFO L226 Difference]: Without dead ends: 39951 [2021-06-05 23:02:58,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 5378.1ms TimeCoverageRelationStatistics Valid=1002, Invalid=13518, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 23:02:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39951 states. [2021-06-05 23:02:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39951 to 31384. [2021-06-05 23:02:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31384 states, 31383 states have (on average 3.1069050122677884) internal successors, (97504), 31383 states have internal predecessors, (97504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31384 states to 31384 states and 97504 transitions. [2021-06-05 23:02:59,354 INFO L78 Accepts]: Start accepts. Automaton has 31384 states and 97504 transitions. Word has length 49 [2021-06-05 23:02:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:02:59,354 INFO L482 AbstractCegarLoop]: Abstraction has 31384 states and 97504 transitions. [2021-06-05 23:02:59,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:02:59,354 INFO L276 IsEmpty]: Start isEmpty. Operand 31384 states and 97504 transitions. [2021-06-05 23:02:59,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:02:59,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:02:59,385 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:02:59,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:02:59,585 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:02:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:02:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash -626196288, now seen corresponding path program 170 times [2021-06-05 23:02:59,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:02:59,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311214640] [2021-06-05 23:02:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:02:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:00,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311214640] [2021-06-05 23:03:00,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311214640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:00,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948891750] [2021-06-05 23:03:00,116 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:00,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:00,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:00,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:03:00,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:00,650 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:00,650 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 71 treesize of output 43 [2021-06-05 23:03:00,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:00,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:00,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:00,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:83, output treesize:38 [2021-06-05 23:03:00,849 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:00,849 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 47 treesize of output 27 [2021-06-05 23:03:00,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:00,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:00,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:00,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:17 [2021-06-05 23:03:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:01,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948891750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:01,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:01,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2021-06-05 23:03:01,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442871735] [2021-06-05 23:03:01,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-06-05 23:03:01,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:01,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-06-05 23:03:01,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:03:01,087 INFO L87 Difference]: Start difference. First operand 31384 states and 97504 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:05,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:05,951 INFO L93 Difference]: Finished difference Result 32827 states and 101444 transitions. [2021-06-05 23:03:05,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:03:05,951 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:03:05,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:06,002 INFO L225 Difference]: With dead ends: 32827 [2021-06-05 23:03:06,003 INFO L226 Difference]: Without dead ends: 32640 [2021-06-05 23:03:06,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1407 ImplicationChecksByTransitivity, 3012.7ms TimeCoverageRelationStatistics Valid=411, Invalid=7071, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:03:06,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32640 states. [2021-06-05 23:03:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32640 to 31449. [2021-06-05 23:03:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31449 states, 31448 states have (on average 3.106366064614602) internal successors, (97689), 31448 states have internal predecessors, (97689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31449 states to 31449 states and 97689 transitions. [2021-06-05 23:03:06,433 INFO L78 Accepts]: Start accepts. Automaton has 31449 states and 97689 transitions. Word has length 49 [2021-06-05 23:03:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:06,434 INFO L482 AbstractCegarLoop]: Abstraction has 31449 states and 97689 transitions. [2021-06-05 23:03:06,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 31449 states and 97689 transitions. [2021-06-05 23:03:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:03:06,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:06,465 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:06,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 23:03:06,665 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash 228100762, now seen corresponding path program 171 times [2021-06-05 23:03:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:06,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650598857] [2021-06-05 23:03:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:07,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:07,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650598857] [2021-06-05 23:03:07,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650598857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:07,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126855594] [2021-06-05 23:03:07,243 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:07,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:03:07,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:07,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:03:07,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:07,428 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 23:03:08,089 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:08,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:03:08,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:08,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:08,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:08,100 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:77, output treesize:45 [2021-06-05 23:03:08,322 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:08,323 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 30 [2021-06-05 23:03:08,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:08,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:08,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:08,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:20 [2021-06-05 23:03:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:08,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126855594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:08,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:08,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 52 [2021-06-05 23:03:08,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979298106] [2021-06-05 23:03:08,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 23:03:08,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:08,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 23:03:08,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2595, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:03:08,564 INFO L87 Difference]: Start difference. First operand 31449 states and 97689 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:14,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:14,663 INFO L93 Difference]: Finished difference Result 40720 states and 124475 transitions. [2021-06-05 23:03:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 23:03:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:03:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:14,725 INFO L225 Difference]: With dead ends: 40720 [2021-06-05 23:03:14,725 INFO L226 Difference]: Without dead ends: 40501 [2021-06-05 23:03:14,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3232 ImplicationChecksByTransitivity, 4530.8ms TimeCoverageRelationStatistics Valid=918, Invalid=11964, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 23:03:14,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40501 states. [2021-06-05 23:03:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40501 to 31410. [2021-06-05 23:03:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31410 states, 31409 states have (on average 3.106689165525805) internal successors, (97578), 31409 states have internal predecessors, (97578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31410 states to 31410 states and 97578 transitions. [2021-06-05 23:03:15,227 INFO L78 Accepts]: Start accepts. Automaton has 31410 states and 97578 transitions. Word has length 49 [2021-06-05 23:03:15,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:15,227 INFO L482 AbstractCegarLoop]: Abstraction has 31410 states and 97578 transitions. [2021-06-05 23:03:15,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 31410 states and 97578 transitions. [2021-06-05 23:03:15,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:03:15,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:15,259 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:15,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 23:03:15,460 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash -969085764, now seen corresponding path program 172 times [2021-06-05 23:03:15,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:15,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110722746] [2021-06-05 23:03:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:16,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:16,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110722746] [2021-06-05 23:03:16,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110722746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:16,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025682360] [2021-06-05 23:03:16,007 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:16,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:03:16,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:03:16,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:16,720 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:16,720 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 51 treesize of output 27 [2021-06-05 23:03:16,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:16,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:16,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:16,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:43 [2021-06-05 23:03:17,115 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:17,116 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 26 [2021-06-05 23:03:17,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:17,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:17,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:17,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 23:03:17,392 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:17,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025682360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:17,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:17,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 23:03:17,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248725488] [2021-06-05 23:03:17,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 23:03:17,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:17,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 23:03:17,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2830, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:03:17,393 INFO L87 Difference]: Start difference. First operand 31410 states and 97578 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:23,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:23,877 INFO L93 Difference]: Finished difference Result 41342 states and 126398 transitions. [2021-06-05 23:03:23,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 23:03:23,877 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:03:23,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:23,940 INFO L225 Difference]: With dead ends: 41342 [2021-06-05 23:03:23,940 INFO L226 Difference]: Without dead ends: 41123 [2021-06-05 23:03:23,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 4798.3ms TimeCoverageRelationStatistics Valid=753, Invalid=11903, Unknown=0, NotChecked=0, Total=12656 [2021-06-05 23:03:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41123 states. [2021-06-05 23:03:24,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41123 to 31403. [2021-06-05 23:03:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31403 states, 31402 states have (on average 3.1067129482198585) internal successors, (97557), 31402 states have internal predecessors, (97557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31403 states to 31403 states and 97557 transitions. [2021-06-05 23:03:24,460 INFO L78 Accepts]: Start accepts. Automaton has 31403 states and 97557 transitions. Word has length 49 [2021-06-05 23:03:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:24,460 INFO L482 AbstractCegarLoop]: Abstraction has 31403 states and 97557 transitions. [2021-06-05 23:03:24,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 31403 states and 97557 transitions. [2021-06-05 23:03:24,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:03:24,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:24,491 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:24,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 23:03:24,692 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:24,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:24,692 INFO L82 PathProgramCache]: Analyzing trace with hash 727220476, now seen corresponding path program 173 times [2021-06-05 23:03:24,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:24,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239184864] [2021-06-05 23:03:24,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:25,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239184864] [2021-06-05 23:03:25,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239184864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98409980] [2021-06-05 23:03:25,331 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:25,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:03:25,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-05 23:03:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:26,084 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:26,084 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 51 treesize of output 27 [2021-06-05 23:03:26,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:26,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:26,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:26,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:43 [2021-06-05 23:03:26,485 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:26,485 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 26 [2021-06-05 23:03:26,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:26,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:26,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:26,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 23:03:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:26,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98409980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:26,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:26,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 52 [2021-06-05 23:03:26,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263047691] [2021-06-05 23:03:26,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-06-05 23:03:26,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:26,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-06-05 23:03:26,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2638, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:03:26,791 INFO L87 Difference]: Start difference. First operand 31403 states and 97557 transitions. Second operand has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:32,477 INFO L93 Difference]: Finished difference Result 32325 states and 100076 transitions. [2021-06-05 23:03:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:03:32,477 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:03:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:32,526 INFO L225 Difference]: With dead ends: 32325 [2021-06-05 23:03:32,526 INFO L226 Difference]: Without dead ends: 32188 [2021-06-05 23:03:32,526 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 3908.9ms TimeCoverageRelationStatistics Valid=326, Invalid=7156, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 23:03:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32188 states. [2021-06-05 23:03:32,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32188 to 31433. [2021-06-05 23:03:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31433 states, 31432 states have (on average 3.106515652837872) internal successors, (97644), 31432 states have internal predecessors, (97644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31433 states to 31433 states and 97644 transitions. [2021-06-05 23:03:32,949 INFO L78 Accepts]: Start accepts. Automaton has 31433 states and 97644 transitions. Word has length 49 [2021-06-05 23:03:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:32,949 INFO L482 AbstractCegarLoop]: Abstraction has 31433 states and 97644 transitions. [2021-06-05 23:03:32,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.830188679245283) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 31433 states and 97644 transitions. [2021-06-05 23:03:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:03:32,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:32,981 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:33,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 23:03:33,181 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1453492680, now seen corresponding path program 174 times [2021-06-05 23:03:33,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:33,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123333491] [2021-06-05 23:03:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:33,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:33,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123333491] [2021-06-05 23:03:33,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123333491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:33,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438612142] [2021-06-05 23:03:33,700 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:33,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:03:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2021-06-05 23:03:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:34,254 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:34,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 28 [2021-06-05 23:03:34,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:34,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:34,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:34,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:70, output treesize:38 [2021-06-05 23:03:34,664 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:34,665 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 47 treesize of output 23 [2021-06-05 23:03:34,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:34,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:34,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:34,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:21 [2021-06-05 23:03:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:34,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438612142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:34,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:34,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 50 [2021-06-05 23:03:34,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385713376] [2021-06-05 23:03:34,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-06-05 23:03:34,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:34,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-06-05 23:03:34,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=2434, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 23:03:34,894 INFO L87 Difference]: Start difference. First operand 31433 states and 97644 transitions. Second operand has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:40,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:40,084 INFO L93 Difference]: Finished difference Result 32727 states and 101197 transitions. [2021-06-05 23:03:40,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 23:03:40,085 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:03:40,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:40,137 INFO L225 Difference]: With dead ends: 32727 [2021-06-05 23:03:40,137 INFO L226 Difference]: Without dead ends: 32533 [2021-06-05 23:03:40,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 3339.5ms TimeCoverageRelationStatistics Valid=323, Invalid=6649, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 23:03:40,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32533 states. [2021-06-05 23:03:40,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32533 to 31489. [2021-06-05 23:03:40,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31489 states, 31488 states have (on average 3.1062309451219514) internal successors, (97809), 31488 states have internal predecessors, (97809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31489 states to 31489 states and 97809 transitions. [2021-06-05 23:03:40,572 INFO L78 Accepts]: Start accepts. Automaton has 31489 states and 97809 transitions. Word has length 49 [2021-06-05 23:03:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:40,572 INFO L482 AbstractCegarLoop]: Abstraction has 31489 states and 97809 transitions. [2021-06-05 23:03:40,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 31489 states and 97809 transitions. [2021-06-05 23:03:40,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:03:40,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:40,607 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:40,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:40,808 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:40,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2102077402, now seen corresponding path program 175 times [2021-06-05 23:03:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:40,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788555631] [2021-06-05 23:03:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:41,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:41,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788555631] [2021-06-05 23:03:41,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788555631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:41,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859424444] [2021-06-05 23:03:41,352 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:41,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 59 conjunts are in the unsatisfiable core [2021-06-05 23:03:41,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:42,072 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:42,072 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 51 treesize of output 27 [2021-06-05 23:03:42,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:42,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:42,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:42,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:78, output treesize:41 [2021-06-05 23:03:42,467 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:42,468 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 26 [2021-06-05 23:03:42,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:42,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:42,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:42,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:20 [2021-06-05 23:03:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:42,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859424444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:42,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:03:42,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 54 [2021-06-05 23:03:42,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156158576] [2021-06-05 23:03:42,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-06-05 23:03:42,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:03:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-06-05 23:03:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2830, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:03:42,739 INFO L87 Difference]: Start difference. First operand 31489 states and 97809 transitions. Second operand has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:49,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:03:49,298 INFO L93 Difference]: Finished difference Result 41976 states and 128315 transitions. [2021-06-05 23:03:49,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 23:03:49,299 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-06-05 23:03:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:03:49,362 INFO L225 Difference]: With dead ends: 41976 [2021-06-05 23:03:49,363 INFO L226 Difference]: Without dead ends: 41757 [2021-06-05 23:03:49,363 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2600 ImplicationChecksByTransitivity, 4532.3ms TimeCoverageRelationStatistics Valid=700, Invalid=11072, Unknown=0, NotChecked=0, Total=11772 [2021-06-05 23:03:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41757 states. [2021-06-05 23:03:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41757 to 31615. [2021-06-05 23:03:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31615 states, 31614 states have (on average 3.1058075536154868) internal successors, (98187), 31614 states have internal predecessors, (98187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31615 states to 31615 states and 98187 transitions. [2021-06-05 23:03:49,936 INFO L78 Accepts]: Start accepts. Automaton has 31615 states and 98187 transitions. Word has length 49 [2021-06-05 23:03:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:03:49,936 INFO L482 AbstractCegarLoop]: Abstraction has 31615 states and 98187 transitions. [2021-06-05 23:03:49,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 54 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:03:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31615 states and 98187 transitions. [2021-06-05 23:03:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-06-05 23:03:49,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:03:49,968 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:03:50,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:50,168 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:03:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:03:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash -405771162, now seen corresponding path program 176 times [2021-06-05 23:03:50,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:03:50,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523953168] [2021-06-05 23:03:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:03:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:03:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:03:50,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:03:50,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523953168] [2021-06-05 23:03:50,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523953168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:03:50,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003507400] [2021-06-05 23:03:50,674 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:03:50,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:03:50,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:03:50,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-05 23:03:50,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:03:51,360 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:51,361 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 65 treesize of output 37 [2021-06-05 23:03:51,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:51,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:80, output treesize:49 [2021-06-05 23:03:51,607 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-05 23:03:51,607 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 63 treesize of output 31 [2021-06-05 23:03:51,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:03:51,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:03:51,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:66, output treesize:20 Received shutdown request... [2021-06-05 23:03:51,764 WARN L222 SmtUtils]: Removed 8 from assertion stack [2021-06-05 23:03:51,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 23:03:51,964 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:03:51,966 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:03:51,967 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:03:51,967 INFO L202 PluginConnector]: Adding new model horseshoe.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:03:51 BasicIcfg [2021-06-05 23:03:51,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:03:51,968 INFO L168 Benchmark]: Toolchain (without parser) took 784618.95 ms. Allocated memory was 362.8 MB in the beginning and 3.8 GB in the end (delta: 3.5 GB). Free memory was 342.2 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-06-05 23:03:51,968 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 362.8 MB. Free memory was 343.5 MB in the beginning and 343.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:03:51,968 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.21 ms. Allocated memory is still 362.8 MB. Free memory was 342.2 MB in the beginning and 340.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:03:51,968 INFO L168 Benchmark]: Boogie Preprocessor took 11.83 ms. Allocated memory is still 362.8 MB. Free memory was 340.7 MB in the beginning and 339.7 MB in the end (delta: 996.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 23:03:51,968 INFO L168 Benchmark]: RCFGBuilder took 291.82 ms. Allocated memory is still 362.8 MB. Free memory was 339.6 MB in the beginning and 324.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 23:03:51,968 INFO L168 Benchmark]: TraceAbstraction took 784292.39 ms. Allocated memory was 362.8 MB in the beginning and 3.8 GB in the end (delta: 3.5 GB). Free memory was 323.7 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. [2021-06-05 23:03:51,969 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 362.8 MB. Free memory was 343.5 MB in the beginning and 343.4 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.21 ms. Allocated memory is still 362.8 MB. Free memory was 342.2 MB in the beginning and 340.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.83 ms. Allocated memory is still 362.8 MB. Free memory was 340.7 MB in the beginning and 339.7 MB in the end (delta: 996.9 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 291.82 ms. Allocated memory is still 362.8 MB. Free memory was 339.6 MB in the beginning and 324.2 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 784292.39 ms. Allocated memory was 362.8 MB in the beginning and 3.8 GB in the end (delta: 3.5 GB). Free memory was 323.7 MB in the beginning and 1.7 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 50 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 22 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 53 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 784220.2ms, OverallIterations: 183, TraceHistogramMax: 3, EmptinessCheckTime: 2000.0ms, AutomataDifference: 531497.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 54.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 35078 SDtfs, 117711 SDslu, 827321 SDs, 0 SdLazy, 593185 SolverSat, 17710 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 213579.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16433 GetRequests, 3979 SyntacticMatches, 75 SemanticMatches, 12379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214270 ImplicationChecksByTransitivity, 398218.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31615occurred in iteration=182, InterpolantAutomatonStates: 9131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 30891.0ms AutomataMinimizationTime, 182 MinimizatonAttempts, 667848 StatesRemovedByMinimization, 179 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 784.6ms SsaConstructionTime, 2793.8ms SatisfiabilityAnalysisTime, 174288.5ms InterpolantComputationTime, 13860 NumberOfCodeBlocks, 13860 NumberOfCodeBlocksAsserted, 667 NumberOfCheckSat, 13499 ConstructedInterpolants, 110 QuantifiedInterpolants, 320864 SizeOfPredicates, 1904 NumberOfNonLiveVariables, 18931 ConjunctsInSsa, 7588 ConjunctsInUnsatCore, 361 InterpolantComputations, 5 PerfectInterpolantSequences, 354/6205 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