/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-bad/threaded-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:34:25,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:34:25,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:34:25,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:34:25,205 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 23:34:25,232 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:34:25,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:34:25,233 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:34:25,233 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:34:25,235 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:34:25,235 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:34:25,235 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:34:25,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:34:25,235 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:34:25,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:34:25,236 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:34:25,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:34:25,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:34:25,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:34:25,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:34:25,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:34:25,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:34:25,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:34:25,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:34:25,238 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:34:25,238 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:34:25,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:34:25,238 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:34:25,238 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:34:25,238 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:34:25,480 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:34:25,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:34:25,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:34:25,497 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:34:25,498 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:34:25,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl [2021-06-05 23:34:25,499 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/threaded-sum-2.wvr.bpl' [2021-06-05 23:34:25,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:34:25,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:34:25,521 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:34:25,521 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:34:25,521 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:34:25,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:34:25,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:34:25,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:34:25,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:34:25,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/1) ... [2021-06-05 23:34:25,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:34:25,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:34:25,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:34:25,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:34:25,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (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 23:34:25,617 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:34:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:34:25,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:34:25,618 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:34:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:34:25,618 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:34:25,618 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:34:25,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:34:25,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:34:25,619 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 23:34:25,805 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:34:25,805 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 23:34:25,807 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:34:25 BoogieIcfgContainer [2021-06-05 23:34:25,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:34:25,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:34:25,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:34:25,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:34:25,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:34:25" (1/2) ... [2021-06-05 23:34:25,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cdc9e3 and model type threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:34:25, skipping insertion in model container [2021-06-05 23:34:25,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:34:25" (2/2) ... [2021-06-05 23:34:25,812 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.bpl [2021-06-05 23:34:25,816 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:34:25,816 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:34:25,816 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:34:25,817 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:34:25,861 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 23:34:25,881 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 23:34:25,905 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:34:25,905 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:34:25,905 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:34:25,905 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:34:25,906 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:34:25,906 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:34:25,906 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:34:25,906 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:34:25,916 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 24 transitions, 64 flow [2021-06-05 23:34:25,937 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:25,939 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:34:25,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:25,944 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:25,944 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash -281375544, now seen corresponding path program 1 times [2021-06-05 23:34:25,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:25,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285289120] [2021-06-05 23:34:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:26,061 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 23:34:26,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:26,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285289120] [2021-06-05 23:34:26,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285289120] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:26,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:26,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:34:26,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039622864] [2021-06-05 23:34:26,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:34:26,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:34:26,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:26,079 INFO L87 Difference]: Start difference. First operand has 40 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:26,117 INFO L93 Difference]: Finished difference Result 38 states and 65 transitions. [2021-06-05 23:34:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:34:26,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 23:34:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:26,124 INFO L225 Difference]: With dead ends: 38 [2021-06-05 23:34:26,124 INFO L226 Difference]: Without dead ends: 38 [2021-06-05 23:34:26,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:34:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-06-05 23:34:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-06-05 23:34:26,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 37 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2021-06-05 23:34:26,152 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 15 [2021-06-05 23:34:26,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:26,152 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2021-06-05 23:34:26,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,152 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2021-06-05 23:34:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:34:26,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:26,154 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:26,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:34:26,154 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:26,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1344639720, now seen corresponding path program 1 times [2021-06-05 23:34:26,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:26,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558367839] [2021-06-05 23:34:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:26,192 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 23:34:26,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:26,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558367839] [2021-06-05 23:34:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558367839] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:26,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:26,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:34:26,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172782804] [2021-06-05 23:34:26,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:34:26,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:26,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:34:26,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:34:26,194 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:26,217 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-06-05 23:34:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:34:26,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:34:26,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:26,219 INFO L225 Difference]: With dead ends: 62 [2021-06-05 23:34:26,219 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 23:34:26,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:34:26,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 23:34:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-06-05 23:34:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.8644067796610169) internal successors, (110), 59 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 110 transitions. [2021-06-05 23:34:26,225 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 110 transitions. Word has length 18 [2021-06-05 23:34:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 110 transitions. [2021-06-05 23:34:26,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 110 transitions. [2021-06-05 23:34:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:34:26,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:26,226 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] [2021-06-05 23:34:26,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:34:26,226 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:26,227 INFO L82 PathProgramCache]: Analyzing trace with hash 405244970, now seen corresponding path program 1 times [2021-06-05 23:34:26,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:26,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865669545] [2021-06-05 23:34:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:26,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:26,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:26,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865669545] [2021-06-05 23:34:26,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865669545] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:34:26,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:34:26,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 23:34:26,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92536444] [2021-06-05 23:34:26,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:34:26,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:26,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:34:26,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:34:26,260 INFO L87 Difference]: Start difference. First operand 60 states and 110 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:26,275 INFO L93 Difference]: Finished difference Result 87 states and 157 transitions. [2021-06-05 23:34:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:34:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:34:26,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:26,276 INFO L225 Difference]: With dead ends: 87 [2021-06-05 23:34:26,276 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 23:34:26,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:34:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 23:34:26,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2021-06-05 23:34:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 61 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 115 transitions. [2021-06-05 23:34:26,283 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 115 transitions. Word has length 20 [2021-06-05 23:34:26,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:26,283 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 115 transitions. [2021-06-05 23:34:26,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 115 transitions. [2021-06-05 23:34:26,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:26,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:26,284 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:26,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:34:26,285 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:26,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:26,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1785950996, now seen corresponding path program 2 times [2021-06-05 23:34:26,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:26,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437856142] [2021-06-05 23:34:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:26,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:26,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437856142] [2021-06-05 23:34:26,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437856142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:26,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375955383] [2021-06-05 23:34:26,532 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 23:34:26,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:26,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:26,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:34:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:27,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375955383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:27,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:27,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 23:34:27,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211749832] [2021-06-05 23:34:27,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:34:27,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:27,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:34:27,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:34:27,058 INFO L87 Difference]: Start difference. First operand 62 states and 115 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:27,411 INFO L93 Difference]: Finished difference Result 116 states and 207 transitions. [2021-06-05 23:34:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:34:27,412 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:34:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:27,413 INFO L225 Difference]: With dead ends: 116 [2021-06-05 23:34:27,413 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 23:34:27,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 564.4ms TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:34:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 23:34:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 23:34:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.904109589041096) internal successors, (139), 73 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 139 transitions. [2021-06-05 23:34:27,419 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 139 transitions. Word has length 22 [2021-06-05 23:34:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:27,419 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 139 transitions. [2021-06-05 23:34:27,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 139 transitions. [2021-06-05 23:34:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:27,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:27,420 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:27,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:27,625 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:27,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:27,626 INFO L82 PathProgramCache]: Analyzing trace with hash 828519660, now seen corresponding path program 3 times [2021-06-05 23:34:27,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:27,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185547438] [2021-06-05 23:34:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:27,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:27,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185547438] [2021-06-05 23:34:27,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185547438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:27,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065895488] [2021-06-05 23:34:27,814 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 23:34:27,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:34:27,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:34:27,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:28,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065895488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:28,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:28,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:34:28,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250642371] [2021-06-05 23:34:28,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:34:28,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:28,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:34:28,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:34:28,252 INFO L87 Difference]: Start difference. First operand 74 states and 139 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:28,791 INFO L93 Difference]: Finished difference Result 163 states and 299 transitions. [2021-06-05 23:34:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:34:28,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:34:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:28,792 INFO L225 Difference]: With dead ends: 163 [2021-06-05 23:34:28,792 INFO L226 Difference]: Without dead ends: 149 [2021-06-05 23:34:28,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:34:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-06-05 23:34:28,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 76. [2021-06-05 23:34:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-06-05 23:34:28,798 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-06-05 23:34:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:28,798 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-06-05 23:34:28,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-06-05 23:34:28,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:28,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:28,799 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:29,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:29,013 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:29,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1769874196, now seen corresponding path program 4 times [2021-06-05 23:34:29,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:29,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161366819] [2021-06-05 23:34:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:29,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:29,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161366819] [2021-06-05 23:34:29,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161366819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:29,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004185144] [2021-06-05 23:34:29,186 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 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 23:34:29,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:29,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:29,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:34:29,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:29,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004185144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:29,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:29,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:34:29,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530003505] [2021-06-05 23:34:29,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:34:29,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:29,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:34:29,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:34:29,531 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:30,397 INFO L93 Difference]: Finished difference Result 201 states and 383 transitions. [2021-06-05 23:34:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:34:30,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:34:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:30,399 INFO L225 Difference]: With dead ends: 201 [2021-06-05 23:34:30,399 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 23:34:30,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 843.3ms TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:34:30,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 23:34:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 76. [2021-06-05 23:34:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9333333333333333) internal successors, (145), 75 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 145 transitions. [2021-06-05 23:34:30,404 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 145 transitions. Word has length 22 [2021-06-05 23:34:30,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:30,404 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 145 transitions. [2021-06-05 23:34:30,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:30,405 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 145 transitions. [2021-06-05 23:34:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:30,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:30,405 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:30,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 23:34:30,621 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:30,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:30,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1242135592, now seen corresponding path program 5 times [2021-06-05 23:34:30,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:30,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614281450] [2021-06-05 23:34:30,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:30,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:30,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614281450] [2021-06-05 23:34:30,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614281450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:30,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453428027] [2021-06-05 23:34:30,752 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 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 23:34:30,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:30,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:34:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:31,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453428027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:31,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:31,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:34:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901464714] [2021-06-05 23:34:31,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:34:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:34:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:34:31,093 INFO L87 Difference]: Start difference. First operand 76 states and 145 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:31,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:31,503 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-06-05 23:34:31,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:34:31,504 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:34:31,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:31,504 INFO L225 Difference]: With dead ends: 144 [2021-06-05 23:34:31,504 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 23:34:31,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:34:31,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 23:34:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2021-06-05 23:34:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9887640449438202) internal successors, (177), 89 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 177 transitions. [2021-06-05 23:34:31,508 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 177 transitions. Word has length 22 [2021-06-05 23:34:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:31,509 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 177 transitions. [2021-06-05 23:34:31,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 177 transitions. [2021-06-05 23:34:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:31,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:31,509 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:31,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:31,725 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:31,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:31,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1356258264, now seen corresponding path program 6 times [2021-06-05 23:34:31,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:31,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847817533] [2021-06-05 23:34:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:31,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:31,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847817533] [2021-06-05 23:34:31,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847817533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:31,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975526031] [2021-06-05 23:34:31,864 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 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 23:34:31,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:34:31,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:34:31,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:32,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975526031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:32,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:32,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-06-05 23:34:32,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079944295] [2021-06-05 23:34:32,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:34:32,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:32,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:34:32,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:34:32,171 INFO L87 Difference]: Start difference. First operand 90 states and 177 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:32,788 INFO L93 Difference]: Finished difference Result 199 states and 389 transitions. [2021-06-05 23:34:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:34:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:34:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:32,790 INFO L225 Difference]: With dead ends: 199 [2021-06-05 23:34:32,790 INFO L226 Difference]: Without dead ends: 167 [2021-06-05 23:34:32,790 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 613.6ms TimeCoverageRelationStatistics Valid=252, Invalid=1154, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:34:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-06-05 23:34:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 88. [2021-06-05 23:34:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-06-05 23:34:32,794 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-06-05 23:34:32,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:32,795 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-06-05 23:34:32,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-06-05 23:34:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:32,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:32,795 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:32,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 23:34:32,996 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1781598820, now seen corresponding path program 7 times [2021-06-05 23:34:32,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:32,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616343472] [2021-06-05 23:34:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:33,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:33,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:33,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616343472] [2021-06-05 23:34:33,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616343472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:33,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932748989] [2021-06-05 23:34:33,114 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 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 23:34:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:34:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:33,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932748989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:33,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:33,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:34:33,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605357732] [2021-06-05 23:34:33,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:34:33,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:33,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:34:33,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:34:33,400 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:33,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:33,778 INFO L93 Difference]: Finished difference Result 172 states and 329 transitions. [2021-06-05 23:34:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:34:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:34:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:33,779 INFO L225 Difference]: With dead ends: 172 [2021-06-05 23:34:33,779 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 23:34:33,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:34:33,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 23:34:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2021-06-05 23:34:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 171 transitions. [2021-06-05 23:34:33,783 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 171 transitions. Word has length 22 [2021-06-05 23:34:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:33,783 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 171 transitions. [2021-06-05 23:34:33,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 171 transitions. [2021-06-05 23:34:33,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:34:33,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:33,783 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:33,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 23:34:34,000 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash 449508136, now seen corresponding path program 8 times [2021-06-05 23:34:34,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:34,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414894538] [2021-06-05 23:34:34,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:34,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:34,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414894538] [2021-06-05 23:34:34,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414894538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:34,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514653204] [2021-06-05 23:34:34,127 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 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 23:34:34,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:34,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:34:34,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:34,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514653204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:34,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:34,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:34:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541110213] [2021-06-05 23:34:34,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:34:34,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:34:34,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:34:34,414 INFO L87 Difference]: Start difference. First operand 88 states and 171 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:34,808 INFO L93 Difference]: Finished difference Result 214 states and 410 transitions. [2021-06-05 23:34:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:34:34,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:34:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:34,812 INFO L225 Difference]: With dead ends: 214 [2021-06-05 23:34:34,812 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 23:34:34,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 440.7ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:34:34,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 23:34:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 94. [2021-06-05 23:34:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 93 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 183 transitions. [2021-06-05 23:34:34,817 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 183 transitions. Word has length 22 [2021-06-05 23:34:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:34,817 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 183 transitions. [2021-06-05 23:34:34,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 183 transitions. [2021-06-05 23:34:34,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:34:34,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:34,818 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:35,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:35,025 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:35,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1295303378, now seen corresponding path program 9 times [2021-06-05 23:34:35,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:35,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073553034] [2021-06-05 23:34:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:34:35,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:35,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073553034] [2021-06-05 23:34:35,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073553034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:35,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847123615] [2021-06-05 23:34:35,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:34:35,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:34:35,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:35,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:34:35,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:35,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847123615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:35,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:35,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 23:34:35,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278524648] [2021-06-05 23:34:35,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:34:35,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:35,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:34:35,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:34:35,490 INFO L87 Difference]: Start difference. First operand 94 states and 183 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:35,798 INFO L93 Difference]: Finished difference Result 186 states and 344 transitions. [2021-06-05 23:34:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:34:35,799 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:34:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:35,800 INFO L225 Difference]: With dead ends: 186 [2021-06-05 23:34:35,800 INFO L226 Difference]: Without dead ends: 140 [2021-06-05 23:34:35,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:34:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-06-05 23:34:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2021-06-05 23:34:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.9754098360655739) internal successors, (241), 122 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 241 transitions. [2021-06-05 23:34:35,810 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 241 transitions. Word has length 24 [2021-06-05 23:34:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:35,811 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 241 transitions. [2021-06-05 23:34:35,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 241 transitions. [2021-06-05 23:34:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:34:35,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:35,812 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:36,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 23:34:36,030 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 886879146, now seen corresponding path program 10 times [2021-06-05 23:34:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:36,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370644719] [2021-06-05 23:34:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:34:36,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370644719] [2021-06-05 23:34:36,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370644719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:36,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486861176] [2021-06-05 23:34:36,189 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 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 23:34:36,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:36,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:36,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:34:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:36,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486861176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:36,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:36,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 23:34:36,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744503240] [2021-06-05 23:34:36,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:34:36,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:34:36,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:34:36,668 INFO L87 Difference]: Start difference. First operand 123 states and 241 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:37,176 INFO L93 Difference]: Finished difference Result 183 states and 339 transitions. [2021-06-05 23:34:37,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:34:37,177 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:34:37,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:37,177 INFO L225 Difference]: With dead ends: 183 [2021-06-05 23:34:37,177 INFO L226 Difference]: Without dead ends: 161 [2021-06-05 23:34:37,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 753.8ms TimeCoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:34:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-06-05 23:34:37,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-06-05 23:34:37,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:37,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-06-05 23:34:37,181 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-06-05 23:34:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:37,181 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-06-05 23:34:37,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-06-05 23:34:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:34:37,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:37,182 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:37,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:34:37,393 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:37,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1328794322, now seen corresponding path program 11 times [2021-06-05 23:34:37,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:37,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041506788] [2021-06-05 23:34:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:34:37,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:37,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041506788] [2021-06-05 23:34:37,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041506788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:37,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658371543] [2021-06-05 23:34:37,518 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:34:37,552 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:34:37,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:34:37,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:38,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658371543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:38,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:38,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2021-06-05 23:34:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185467248] [2021-06-05 23:34:38,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:34:38,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:34:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:34:38,051 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:38,761 INFO L93 Difference]: Finished difference Result 196 states and 367 transitions. [2021-06-05 23:34:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:34:38,762 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:34:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:38,763 INFO L225 Difference]: With dead ends: 196 [2021-06-05 23:34:38,763 INFO L226 Difference]: Without dead ends: 172 [2021-06-05 23:34:38,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 925.4ms TimeCoverageRelationStatistics Valid=300, Invalid=1260, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:34:38,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-06-05 23:34:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 124. [2021-06-05 23:34:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 243 transitions. [2021-06-05 23:34:38,766 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 243 transitions. Word has length 24 [2021-06-05 23:34:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:38,767 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 243 transitions. [2021-06-05 23:34:38,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 243 transitions. [2021-06-05 23:34:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:34:38,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:38,767 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:38,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:38,977 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:38,977 INFO L82 PathProgramCache]: Analyzing trace with hash -727951854, now seen corresponding path program 12 times [2021-06-05 23:34:38,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:38,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369450638] [2021-06-05 23:34:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:39,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:39,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369450638] [2021-06-05 23:34:39,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369450638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:39,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383966046] [2021-06-05 23:34:39,134 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 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 23:34:39,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:34:39,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:39,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:34:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:39,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383966046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:39,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:39,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:34:39,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407548816] [2021-06-05 23:34:39,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:34:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:34:39,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:34:39,484 INFO L87 Difference]: Start difference. First operand 124 states and 243 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 23:34:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:39,870 INFO L93 Difference]: Finished difference Result 168 states and 318 transitions. [2021-06-05 23:34:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:34:39,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 24 [2021-06-05 23:34:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:39,871 INFO L225 Difference]: With dead ends: 168 [2021-06-05 23:34:39,871 INFO L226 Difference]: Without dead ends: 143 [2021-06-05 23:34:39,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:34:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-06-05 23:34:39,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 126. [2021-06-05 23:34:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.976) internal successors, (247), 125 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 247 transitions. [2021-06-05 23:34:39,874 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 247 transitions. Word has length 24 [2021-06-05 23:34:39,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:39,874 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 247 transitions. [2021-06-05 23:34:39,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 23:34:39,874 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 247 transitions. [2021-06-05 23:34:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:34:39,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:39,875 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:40,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 23:34:40,078 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:40,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:40,078 INFO L82 PathProgramCache]: Analyzing trace with hash -966844970, now seen corresponding path program 13 times [2021-06-05 23:34:40,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:40,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720795408] [2021-06-05 23:34:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:40,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:40,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720795408] [2021-06-05 23:34:40,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720795408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627384115] [2021-06-05 23:34:40,217 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 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 23:34:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:34:40,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:40,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627384115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:40,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:40,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:34:40,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97678094] [2021-06-05 23:34:40,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:34:40,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:40,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:34:40,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:34:40,533 INFO L87 Difference]: Start difference. First operand 126 states and 247 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 23:34:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:40,935 INFO L93 Difference]: Finished difference Result 163 states and 308 transitions. [2021-06-05 23:34:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:34:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 24 [2021-06-05 23:34:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:40,936 INFO L225 Difference]: With dead ends: 163 [2021-06-05 23:34:40,936 INFO L226 Difference]: Without dead ends: 138 [2021-06-05 23:34:40,936 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:34:40,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-06-05 23:34:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2021-06-05 23:34:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.9734513274336283) internal successors, (223), 113 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 223 transitions. [2021-06-05 23:34:40,939 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 223 transitions. Word has length 24 [2021-06-05 23:34:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:40,939 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 223 transitions. [2021-06-05 23:34:40,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 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 23:34:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 223 transitions. [2021-06-05 23:34:40,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:40,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:40,939 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:41,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:41,153 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:41,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1813322510, now seen corresponding path program 14 times [2021-06-05 23:34:41,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:41,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502566800] [2021-06-05 23:34:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:41,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:41,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502566800] [2021-06-05 23:34:41,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502566800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:41,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692880644] [2021-06-05 23:34:41,338 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 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 23:34:41,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:41,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:34:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:41,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692880644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:41,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:41,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 23:34:41,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331850605] [2021-06-05 23:34:41,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:34:41,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:41,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:34:41,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:34:41,842 INFO L87 Difference]: Start difference. First operand 114 states and 223 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:42,381 INFO L93 Difference]: Finished difference Result 277 states and 529 transitions. [2021-06-05 23:34:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:34:42,381 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:42,382 INFO L225 Difference]: With dead ends: 277 [2021-06-05 23:34:42,382 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 23:34:42,384 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=382, Invalid=1874, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:34:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 23:34:42,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2021-06-05 23:34:42,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0588235294117645) internal successors, (315), 153 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 315 transitions. [2021-06-05 23:34:42,388 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 315 transitions. Word has length 27 [2021-06-05 23:34:42,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:42,388 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 315 transitions. [2021-06-05 23:34:42,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 315 transitions. [2021-06-05 23:34:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:42,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:42,389 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:42,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 23:34:42,605 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:42,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:42,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1763754766, now seen corresponding path program 15 times [2021-06-05 23:34:42,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:42,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537094481] [2021-06-05 23:34:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:42,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:42,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537094481] [2021-06-05 23:34:42,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537094481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:42,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704798184] [2021-06-05 23:34:42,785 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 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 23:34:42,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:34:42,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:34:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:43,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704798184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:43,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:43,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:34:43,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880833416] [2021-06-05 23:34:43,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:34:43,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:43,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:34:43,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:34:43,275 INFO L87 Difference]: Start difference. First operand 154 states and 315 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:44,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:44,586 INFO L93 Difference]: Finished difference Result 345 states and 670 transitions. [2021-06-05 23:34:44,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 23:34:44,586 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:44,587 INFO L225 Difference]: With dead ends: 345 [2021-06-05 23:34:44,587 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 23:34:44,588 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 1423.2ms TimeCoverageRelationStatistics Valid=750, Invalid=4220, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:34:44,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 23:34:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 158. [2021-06-05 23:34:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-06-05 23:34:44,593 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-06-05 23:34:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:44,593 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-06-05 23:34:44,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-06-05 23:34:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:44,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:44,594 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:44,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:44,811 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash 83258126, now seen corresponding path program 16 times [2021-06-05 23:34:44,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:44,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605344307] [2021-06-05 23:34:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:45,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605344307] [2021-06-05 23:34:45,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605344307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:45,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860379202] [2021-06-05 23:34:45,000 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 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 23:34:45,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:45,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:45,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:34:45,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:45,454 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 23:34:45,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860379202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:45,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:45,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:34:45,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841039941] [2021-06-05 23:34:45,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:34:45,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:34:45,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:34:45,455 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:47,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:47,158 INFO L93 Difference]: Finished difference Result 351 states and 699 transitions. [2021-06-05 23:34:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 23:34:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:47,159 INFO L225 Difference]: With dead ends: 351 [2021-06-05 23:34:47,159 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 23:34:47,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 1639.6ms TimeCoverageRelationStatistics Valid=910, Invalid=5252, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 23:34:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 23:34:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 158. [2021-06-05 23:34:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.082802547770701) internal successors, (327), 157 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 327 transitions. [2021-06-05 23:34:47,164 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 327 transitions. Word has length 27 [2021-06-05 23:34:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:47,164 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 327 transitions. [2021-06-05 23:34:47,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 327 transitions. [2021-06-05 23:34:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:47,165 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:47,165 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:47,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 23:34:47,373 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:47,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1779831566, now seen corresponding path program 17 times [2021-06-05 23:34:47,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:47,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383351870] [2021-06-05 23:34:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:47,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:47,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:47,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383351870] [2021-06-05 23:34:47,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383351870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:47,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24355904] [2021-06-05 23:34:47,563 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 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 23:34:47,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:34:47,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:47,585 WARN L261 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:34:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:48,156 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:48,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24355904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:48,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:48,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-06-05 23:34:48,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710178307] [2021-06-05 23:34:48,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:34:48,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:34:48,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:34:48,157 INFO L87 Difference]: Start difference. First operand 158 states and 327 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:51,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:51,048 INFO L93 Difference]: Finished difference Result 411 states and 807 transitions. [2021-06-05 23:34:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 23:34:51,048 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:51,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:51,049 INFO L225 Difference]: With dead ends: 411 [2021-06-05 23:34:51,049 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 23:34:51,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 2814.4ms TimeCoverageRelationStatistics Valid=1079, Invalid=8041, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 23:34:51,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 23:34:51,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 176. [2021-06-05 23:34:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1085714285714285) internal successors, (369), 175 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 369 transitions. [2021-06-05 23:34:51,059 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 369 transitions. Word has length 27 [2021-06-05 23:34:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:51,059 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 369 transitions. [2021-06-05 23:34:51,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:51,059 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 369 transitions. [2021-06-05 23:34:51,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:51,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:51,059 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:51,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:51,273 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1450173818, now seen corresponding path program 18 times [2021-06-05 23:34:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:51,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87690672] [2021-06-05 23:34:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:51,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:51,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:51,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87690672] [2021-06-05 23:34:51,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87690672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:51,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424070333] [2021-06-05 23:34:51,472 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 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 23:34:51,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:34:51,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:34:51,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:51,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424070333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:51,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:51,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:34:51,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032913098] [2021-06-05 23:34:51,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:34:51,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:51,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:34:51,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:34:51,908 INFO L87 Difference]: Start difference. First operand 176 states and 369 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:52,713 INFO L93 Difference]: Finished difference Result 331 states and 647 transitions. [2021-06-05 23:34:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:34:52,713 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:52,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:52,714 INFO L225 Difference]: With dead ends: 331 [2021-06-05 23:34:52,714 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 23:34:52,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 982.6ms TimeCoverageRelationStatistics Valid=495, Invalid=2811, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:34:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 23:34:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 196. [2021-06-05 23:34:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-06-05 23:34:52,718 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-06-05 23:34:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:52,718 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-06-05 23:34:52,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-06-05 23:34:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:52,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:52,719 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:52,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:52,935 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:52,935 INFO L82 PathProgramCache]: Analyzing trace with hash 246399622, now seen corresponding path program 19 times [2021-06-05 23:34:52,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:52,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19730926] [2021-06-05 23:34:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:53,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19730926] [2021-06-05 23:34:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19730926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:53,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035579715] [2021-06-05 23:34:53,106 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 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 23:34:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:53,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:34:53,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:53,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035579715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:53,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:53,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:34:53,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442891616] [2021-06-05 23:34:53,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:34:53,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:34:53,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:34:53,517 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:54,877 INFO L93 Difference]: Finished difference Result 389 states and 772 transitions. [2021-06-05 23:34:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 23:34:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:54,878 INFO L225 Difference]: With dead ends: 389 [2021-06-05 23:34:54,878 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 23:34:54,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1309.4ms TimeCoverageRelationStatistics Valid=715, Invalid=4115, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:34:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 23:34:54,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 196. [2021-06-05 23:34:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.1384615384615384) internal successors, (417), 195 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:54,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 417 transitions. [2021-06-05 23:34:54,883 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 417 transitions. Word has length 27 [2021-06-05 23:34:54,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:54,883 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 417 transitions. [2021-06-05 23:34:54,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:54,883 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 417 transitions. [2021-06-05 23:34:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:54,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:54,884 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:55,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 23:34:55,097 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:55,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:55,097 INFO L82 PathProgramCache]: Analyzing trace with hash -910710590, now seen corresponding path program 20 times [2021-06-05 23:34:55,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:55,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216795149] [2021-06-05 23:34:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:55,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216795149] [2021-06-05 23:34:55,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216795149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:55,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295522570] [2021-06-05 23:34:55,260 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 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 23:34:55,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:34:55,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:34:55,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:55,638 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 23:34:55,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295522570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:55,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:55,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:34:55,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532986893] [2021-06-05 23:34:55,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:34:55,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:55,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:34:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:34:55,641 INFO L87 Difference]: Start difference. First operand 196 states and 417 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:56,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:56,601 INFO L93 Difference]: Finished difference Result 364 states and 719 transitions. [2021-06-05 23:34:56,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:34:56,601 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:56,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:56,602 INFO L225 Difference]: With dead ends: 364 [2021-06-05 23:34:56,602 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 23:34:56,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1063.8ms TimeCoverageRelationStatistics Valid=520, Invalid=3020, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 23:34:56,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 23:34:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 198. [2021-06-05 23:34:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.1370558375634516) internal successors, (421), 197 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 421 transitions. [2021-06-05 23:34:56,606 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 421 transitions. Word has length 27 [2021-06-05 23:34:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:56,606 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 421 transitions. [2021-06-05 23:34:56,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:56,606 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 421 transitions. [2021-06-05 23:34:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:56,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:56,607 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:56,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:56,817 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:56,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:56,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1689066934, now seen corresponding path program 21 times [2021-06-05 23:34:56,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:56,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098737873] [2021-06-05 23:34:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:56,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:56,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098737873] [2021-06-05 23:34:56,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098737873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:56,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260772332] [2021-06-05 23:34:56,980 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 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 23:34:57,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:34:57,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:57,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:34:57,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:57,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260772332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:57,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:57,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:34:57,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001719616] [2021-06-05 23:34:57,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:34:57,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:34:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:34:57,416 INFO L87 Difference]: Start difference. First operand 198 states and 421 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:58,395 INFO L93 Difference]: Finished difference Result 410 states and 841 transitions. [2021-06-05 23:34:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:34:58,396 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:34:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:58,397 INFO L225 Difference]: With dead ends: 410 [2021-06-05 23:34:58,397 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 23:34:58,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1047.6ms TimeCoverageRelationStatistics Valid=545, Invalid=2877, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 23:34:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 23:34:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 258. [2021-06-05 23:34:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.2140077821011674) internal successors, (569), 257 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 569 transitions. [2021-06-05 23:34:58,402 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 569 transitions. Word has length 27 [2021-06-05 23:34:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:58,402 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 569 transitions. [2021-06-05 23:34:58,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 569 transitions. [2021-06-05 23:34:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:34:58,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:58,403 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:58,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 23:34:58,620 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash 7506506, now seen corresponding path program 22 times [2021-06-05 23:34:58,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:58,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257505681] [2021-06-05 23:34:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:58,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:58,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257505681] [2021-06-05 23:34:58,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257505681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24692953] [2021-06-05 23:34:58,795 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 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 23:34:58,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:58,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:34:58,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:59,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24692953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:59,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:59,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-06-05 23:34:59,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012623215] [2021-06-05 23:34:59,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:34:59,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:59,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:34:59,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:34:59,207 INFO L87 Difference]: Start difference. First operand 258 states and 569 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:00,736 INFO L93 Difference]: Finished difference Result 464 states and 961 transitions. [2021-06-05 23:35:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 23:35:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:00,738 INFO L225 Difference]: With dead ends: 464 [2021-06-05 23:35:00,738 INFO L226 Difference]: Without dead ends: 432 [2021-06-05 23:35:00,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1423.0ms TimeCoverageRelationStatistics Valid=803, Invalid=4747, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:35:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-06-05 23:35:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 230. [2021-06-05 23:35:00,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1790393013100435) internal successors, (499), 229 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:00,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 499 transitions. [2021-06-05 23:35:00,743 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 499 transitions. Word has length 27 [2021-06-05 23:35:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:00,743 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 499 transitions. [2021-06-05 23:35:00,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 499 transitions. [2021-06-05 23:35:00,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:00,743 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:00,744 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:00,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:00,957 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1149603706, now seen corresponding path program 23 times [2021-06-05 23:35:00,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:00,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028213488] [2021-06-05 23:35:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:01,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:01,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028213488] [2021-06-05 23:35:01,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028213488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:01,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072353818] [2021-06-05 23:35:01,135 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 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 23:35:01,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:35:01,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:01,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:01,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072353818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:01,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:01,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:35:01,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223154174] [2021-06-05 23:35:01,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:01,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:01,531 INFO L87 Difference]: Start difference. First operand 230 states and 499 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:02,614 INFO L93 Difference]: Finished difference Result 416 states and 851 transitions. [2021-06-05 23:35:02,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 23:35:02,614 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:02,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:02,615 INFO L225 Difference]: With dead ends: 416 [2021-06-05 23:35:02,615 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 23:35:02,615 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1130.9ms TimeCoverageRelationStatistics Valid=585, Invalid=3197, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:35:02,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 23:35:02,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 190. [2021-06-05 23:35:02,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.121693121693122) internal successors, (401), 189 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 401 transitions. [2021-06-05 23:35:02,625 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 401 transitions. Word has length 27 [2021-06-05 23:35:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:02,625 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 401 transitions. [2021-06-05 23:35:02,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,625 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 401 transitions. [2021-06-05 23:35:02,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:02,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:02,625 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:02,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:02,841 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:02,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1813272906, now seen corresponding path program 24 times [2021-06-05 23:35:02,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:02,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400325989] [2021-06-05 23:35:02,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:03,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:03,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400325989] [2021-06-05 23:35:03,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400325989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:03,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58517475] [2021-06-05 23:35:03,015 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 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 23:35:03,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:35:03,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:03,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:03,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:03,396 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 23:35:03,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58517475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:03,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:03,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:35:03,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24035894] [2021-06-05 23:35:03,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:03,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:03,398 INFO L87 Difference]: Start difference. First operand 190 states and 401 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:04,581 INFO L93 Difference]: Finished difference Result 478 states and 964 transitions. [2021-06-05 23:35:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:35:04,582 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:04,583 INFO L225 Difference]: With dead ends: 478 [2021-06-05 23:35:04,583 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 23:35:04,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1215.7ms TimeCoverageRelationStatistics Valid=628, Invalid=3404, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:35:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 23:35:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 184. [2021-06-05 23:35:04,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.1147540983606556) internal successors, (387), 183 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 387 transitions. [2021-06-05 23:35:04,587 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 387 transitions. Word has length 27 [2021-06-05 23:35:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:04,587 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 387 transitions. [2021-06-05 23:35:04,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 387 transitions. [2021-06-05 23:35:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:04,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:04,588 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:04,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 23:35:04,793 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1183589754, now seen corresponding path program 25 times [2021-06-05 23:35:04,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:04,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063918276] [2021-06-05 23:35:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:04,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:04,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063918276] [2021-06-05 23:35:04,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063918276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:04,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179163254] [2021-06-05 23:35:04,930 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 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 23:35:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:05,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179163254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:05,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:05,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 23:35:05,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650580313] [2021-06-05 23:35:05,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:05,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:05,361 INFO L87 Difference]: Start difference. First operand 184 states and 387 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:06,286 INFO L93 Difference]: Finished difference Result 535 states and 1056 transitions. [2021-06-05 23:35:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 23:35:06,286 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:06,289 INFO L225 Difference]: With dead ends: 535 [2021-06-05 23:35:06,289 INFO L226 Difference]: Without dead ends: 521 [2021-06-05 23:35:06,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 1003.9ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:35:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-05 23:35:06,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 265. [2021-06-05 23:35:06,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-06-05 23:35:06,294 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-06-05 23:35:06,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:06,294 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-06-05 23:35:06,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-06-05 23:35:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:06,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:06,295 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:06,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:06,511 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 512983686, now seen corresponding path program 26 times [2021-06-05 23:35:06,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:06,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13595011] [2021-06-05 23:35:06,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:06,737 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 23:35:07,070 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 23:35:07,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:07,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13595011] [2021-06-05 23:35:07,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13595011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:07,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361199187] [2021-06-05 23:35:07,071 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 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 23:35:07,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:07,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:07,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:07,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:07,507 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:07,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361199187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:07,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:07,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:07,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052185298] [2021-06-05 23:35:07,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:07,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:07,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:07,508 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:09,079 INFO L93 Difference]: Finished difference Result 600 states and 1200 transitions. [2021-06-05 23:35:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:35:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:09,081 INFO L225 Difference]: With dead ends: 600 [2021-06-05 23:35:09,081 INFO L226 Difference]: Without dead ends: 580 [2021-06-05 23:35:09,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 1826.9ms TimeCoverageRelationStatistics Valid=785, Invalid=4765, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 23:35:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-06-05 23:35:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 265. [2021-06-05 23:35:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.2083333333333335) internal successors, (583), 264 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:09,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 583 transitions. [2021-06-05 23:35:09,086 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 583 transitions. Word has length 27 [2021-06-05 23:35:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:09,086 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 583 transitions. [2021-06-05 23:35:09,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 583 transitions. [2021-06-05 23:35:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:09,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:09,087 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:09,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 23:35:09,293 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash -644126526, now seen corresponding path program 27 times [2021-06-05 23:35:09,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:09,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841889380] [2021-06-05 23:35:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:09,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:09,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:09,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841889380] [2021-06-05 23:35:09,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841889380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:09,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748819957] [2021-06-05 23:35:09,441 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 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 23:35:09,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:35:09,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:09,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:09,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748819957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:09,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:09,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:09,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427846160] [2021-06-05 23:35:09,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:09,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:09,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:09,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:09,812 INFO L87 Difference]: Start difference. First operand 265 states and 583 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:11,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:11,249 INFO L93 Difference]: Finished difference Result 651 states and 1311 transitions. [2021-06-05 23:35:11,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 23:35:11,249 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:11,251 INFO L225 Difference]: With dead ends: 651 [2021-06-05 23:35:11,251 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 23:35:11,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1357.8ms TimeCoverageRelationStatistics Valid=769, Invalid=4487, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:35:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 23:35:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 263. [2021-06-05 23:35:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.187022900763359) internal successors, (573), 262 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 573 transitions. [2021-06-05 23:35:11,256 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 573 transitions. Word has length 27 [2021-06-05 23:35:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:11,256 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 573 transitions. [2021-06-05 23:35:11,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 573 transitions. [2021-06-05 23:35:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:11,257 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:11,257 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:11,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:11,473 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -516363890, now seen corresponding path program 28 times [2021-06-05 23:35:11,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:11,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546656674] [2021-06-05 23:35:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:11,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:11,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546656674] [2021-06-05 23:35:11,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546656674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:11,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480918987] [2021-06-05 23:35:11,628 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 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 23:35:11,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:11,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:12,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480918987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:12,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:12,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 23:35:12,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115436423] [2021-06-05 23:35:12,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:12,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:12,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:12,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:12,052 INFO L87 Difference]: Start difference. First operand 263 states and 573 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:12,538 INFO L93 Difference]: Finished difference Result 387 states and 795 transitions. [2021-06-05 23:35:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:35:12,538 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:12,539 INFO L225 Difference]: With dead ends: 387 [2021-06-05 23:35:12,539 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 23:35:12,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 675.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:35:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 23:35:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 275. [2021-06-05 23:35:12,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 23:35:12,543 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-05 23:35:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:12,543 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 23:35:12,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 23:35:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:12,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:12,544 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:12,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 23:35:12,760 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash 2098106766, now seen corresponding path program 29 times [2021-06-05 23:35:12,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:12,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968510549] [2021-06-05 23:35:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:12,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:12,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:12,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968510549] [2021-06-05 23:35:12,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968510549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:12,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687597689] [2021-06-05 23:35:12,921 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 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 23:35:12,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:35:12,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:12,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:13,370 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 23:35:13,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687597689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:13,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:13,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 23:35:13,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513470450] [2021-06-05 23:35:13,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:35:13,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:35:13,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:13,372 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:14,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:14,179 INFO L93 Difference]: Finished difference Result 462 states and 951 transitions. [2021-06-05 23:35:14,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:35:14,179 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:14,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:14,180 INFO L225 Difference]: With dead ends: 462 [2021-06-05 23:35:14,180 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 23:35:14,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 998.0ms TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:35:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 23:35:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 277. [2021-06-05 23:35:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 2.199275362318841) internal successors, (607), 276 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 607 transitions. [2021-06-05 23:35:14,187 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 607 transitions. Word has length 27 [2021-06-05 23:35:14,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:14,187 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 607 transitions. [2021-06-05 23:35:14,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 607 transitions. [2021-06-05 23:35:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:14,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:14,188 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:14,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 23:35:14,402 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash -500287090, now seen corresponding path program 30 times [2021-06-05 23:35:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:14,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491760210] [2021-06-05 23:35:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:14,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:14,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491760210] [2021-06-05 23:35:14,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491760210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:14,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472079633] [2021-06-05 23:35:14,574 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 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 23:35:14,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 23:35:14,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:14,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:14,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:14,964 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 23:35:14,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472079633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:14,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:14,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:14,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905721587] [2021-06-05 23:35:14,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:14,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:14,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:14,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:14,965 INFO L87 Difference]: Start difference. First operand 277 states and 607 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:16,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:16,207 INFO L93 Difference]: Finished difference Result 541 states and 1110 transitions. [2021-06-05 23:35:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:35:16,207 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:16,209 INFO L225 Difference]: With dead ends: 541 [2021-06-05 23:35:16,209 INFO L226 Difference]: Without dead ends: 509 [2021-06-05 23:35:16,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 1214.8ms TimeCoverageRelationStatistics Valid=547, Invalid=3485, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:35:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-06-05 23:35:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 275. [2021-06-05 23:35:16,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 23:35:16,214 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-05 23:35:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:16,214 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 23:35:16,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 23:35:16,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:16,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:16,214 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:16,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:16,425 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1243781370, now seen corresponding path program 31 times [2021-06-05 23:35:16,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:16,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192111890] [2021-06-05 23:35:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:16,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:16,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192111890] [2021-06-05 23:35:16,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192111890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:16,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141313671] [2021-06-05 23:35:16,572 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 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 23:35:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:16,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141313671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:16,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:16,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:16,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983277771] [2021-06-05 23:35:16,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:16,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:16,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:16,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:16,936 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:17,802 INFO L93 Difference]: Finished difference Result 489 states and 1029 transitions. [2021-06-05 23:35:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:35:17,803 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:17,805 INFO L225 Difference]: With dead ends: 489 [2021-06-05 23:35:17,805 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 23:35:17,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 922.6ms TimeCoverageRelationStatistics Valid=409, Invalid=2347, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:35:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 23:35:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 275. [2021-06-05 23:35:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.1934306569343067) internal successors, (601), 274 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 601 transitions. [2021-06-05 23:35:17,809 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 601 transitions. Word has length 27 [2021-06-05 23:35:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:17,809 INFO L482 AbstractCegarLoop]: Abstraction has 275 states and 601 transitions. [2021-06-05 23:35:17,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 601 transitions. [2021-06-05 23:35:17,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:17,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:17,810 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:18,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:18,021 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1179632014, now seen corresponding path program 32 times [2021-06-05 23:35:18,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:18,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669957875] [2021-06-05 23:35:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:18,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:18,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669957875] [2021-06-05 23:35:18,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669957875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:18,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048675215] [2021-06-05 23:35:18,158 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 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 23:35:18,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:18,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:18,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:18,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:18,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048675215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:18,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:18,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 23:35:18,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630582669] [2021-06-05 23:35:18,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:18,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:18,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:18,595 INFO L87 Difference]: Start difference. First operand 275 states and 601 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:19,293 INFO L93 Difference]: Finished difference Result 464 states and 973 transitions. [2021-06-05 23:35:19,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:35:19,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:19,295 INFO L225 Difference]: With dead ends: 464 [2021-06-05 23:35:19,295 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 23:35:19,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 879.0ms TimeCoverageRelationStatistics Valid=346, Invalid=2006, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:35:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 23:35:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 295. [2021-06-05 23:35:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-06-05 23:35:19,300 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-06-05 23:35:19,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:19,300 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-06-05 23:35:19,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:19,300 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-06-05 23:35:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:19,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:19,301 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:19,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 23:35:19,516 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1418761842, now seen corresponding path program 33 times [2021-06-05 23:35:19,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:19,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78845764] [2021-06-05 23:35:19,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:19,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:19,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78845764] [2021-06-05 23:35:19,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78845764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:19,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900070960] [2021-06-05 23:35:19,675 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 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 23:35:19,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:35:19,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:19,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:19,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:20,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900070960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:20,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:20,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:20,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141595481] [2021-06-05 23:35:20,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:20,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:20,055 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:21,305 INFO L93 Difference]: Finished difference Result 569 states and 1201 transitions. [2021-06-05 23:35:21,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 23:35:21,305 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:21,306 INFO L225 Difference]: With dead ends: 569 [2021-06-05 23:35:21,306 INFO L226 Difference]: Without dead ends: 537 [2021-06-05 23:35:21,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1186.6ms TimeCoverageRelationStatistics Valid=549, Invalid=3483, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:35:21,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-06-05 23:35:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 295. [2021-06-05 23:35:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.2006802721088436) internal successors, (647), 294 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 647 transitions. [2021-06-05 23:35:21,311 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 647 transitions. Word has length 27 [2021-06-05 23:35:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:21,311 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 647 transitions. [2021-06-05 23:35:21,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 647 transitions. [2021-06-05 23:35:21,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:21,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:21,311 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:21,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-06-05 23:35:21,527 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:21,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:21,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1719095242, now seen corresponding path program 34 times [2021-06-05 23:35:21,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:21,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774921746] [2021-06-05 23:35:21,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:21,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774921746] [2021-06-05 23:35:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774921746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349797215] [2021-06-05 23:35:21,691 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 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 23:35:21,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:21,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:21,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:22,070 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 23:35:22,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349797215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:22,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:22,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:22,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533133621] [2021-06-05 23:35:22,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:22,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:22,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:22,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:22,071 INFO L87 Difference]: Start difference. First operand 295 states and 647 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:23,039 INFO L93 Difference]: Finished difference Result 627 states and 1345 transitions. [2021-06-05 23:35:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:35:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:23,041 INFO L225 Difference]: With dead ends: 627 [2021-06-05 23:35:23,041 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 23:35:23,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 988.1ms TimeCoverageRelationStatistics Valid=441, Invalid=2529, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:35:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 23:35:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 289. [2021-06-05 23:35:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.1979166666666665) internal successors, (633), 288 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:23,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 633 transitions. [2021-06-05 23:35:23,046 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 633 transitions. Word has length 27 [2021-06-05 23:35:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:23,046 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 633 transitions. [2021-06-05 23:35:23,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:23,046 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 633 transitions. [2021-06-05 23:35:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:23,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:23,046 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:23,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:23,261 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:23,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:23,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2141436106, now seen corresponding path program 35 times [2021-06-05 23:35:23,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:23,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828626707] [2021-06-05 23:35:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:23,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:23,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:23,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828626707] [2021-06-05 23:35:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828626707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:23,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645459711] [2021-06-05 23:35:23,388 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:35:23,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:35:23,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:23,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645459711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:23,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:23,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2021-06-05 23:35:23,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056355734] [2021-06-05 23:35:23,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:23,786 INFO L87 Difference]: Start difference. First operand 289 states and 633 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:24,441 INFO L93 Difference]: Finished difference Result 564 states and 1163 transitions. [2021-06-05 23:35:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:35:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:24,443 INFO L225 Difference]: With dead ends: 564 [2021-06-05 23:35:24,443 INFO L226 Difference]: Without dead ends: 550 [2021-06-05 23:35:24,443 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=351, Invalid=2001, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:35:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-06-05 23:35:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 362. [2021-06-05 23:35:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.224376731301939) internal successors, (803), 361 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 803 transitions. [2021-06-05 23:35:24,448 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 803 transitions. Word has length 27 [2021-06-05 23:35:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:24,448 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 803 transitions. [2021-06-05 23:35:24,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 803 transitions. [2021-06-05 23:35:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:24,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:24,449 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:24,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 23:35:24,656 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:24,656 INFO L82 PathProgramCache]: Analyzing trace with hash -456957750, now seen corresponding path program 36 times [2021-06-05 23:35:24,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:24,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958147709] [2021-06-05 23:35:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:24,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:24,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958147709] [2021-06-05 23:35:24,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958147709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:24,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082486673] [2021-06-05 23:35:24,831 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 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 23:35:24,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:35:24,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:25,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082486673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:25,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:25,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:25,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339964560] [2021-06-05 23:35:25,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:25,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:25,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:25,212 INFO L87 Difference]: Start difference. First operand 362 states and 803 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:26,722 INFO L93 Difference]: Finished difference Result 680 states and 1421 transitions. [2021-06-05 23:35:26,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 23:35:26,723 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:26,724 INFO L225 Difference]: With dead ends: 680 [2021-06-05 23:35:26,725 INFO L226 Difference]: Without dead ends: 660 [2021-06-05 23:35:26,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1379.4ms TimeCoverageRelationStatistics Valid=687, Invalid=4283, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 23:35:26,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-06-05 23:35:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 376. [2021-06-05 23:35:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:26,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-06-05 23:35:26,731 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-06-05 23:35:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:26,731 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-06-05 23:35:26,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-06-05 23:35:26,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:26,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:26,731 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:26,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 23:35:26,945 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:26,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:26,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1614067962, now seen corresponding path program 37 times [2021-06-05 23:35:26,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:26,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565023604] [2021-06-05 23:35:26,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:27,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:27,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565023604] [2021-06-05 23:35:27,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565023604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:27,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604182395] [2021-06-05 23:35:27,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:35:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:27,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:27,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604182395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:27,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:27,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-06-05 23:35:27,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095184476] [2021-06-05 23:35:27,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:27,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:27,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:27,529 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:28,885 INFO L93 Difference]: Finished difference Result 716 states and 1504 transitions. [2021-06-05 23:35:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:35:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:28,887 INFO L225 Difference]: With dead ends: 716 [2021-06-05 23:35:28,887 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 23:35:28,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1325.6ms TimeCoverageRelationStatistics Valid=591, Invalid=3441, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:35:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 23:35:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 376. [2021-06-05 23:35:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.2293333333333334) internal successors, (836), 375 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 836 transitions. [2021-06-05 23:35:28,893 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 836 transitions. Word has length 27 [2021-06-05 23:35:28,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:28,893 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 836 transitions. [2021-06-05 23:35:28,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:28,893 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 836 transitions. [2021-06-05 23:35:28,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:28,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:28,894 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:29,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-05 23:35:29,110 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:29,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1912494094, now seen corresponding path program 38 times [2021-06-05 23:35:29,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:29,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313757308] [2021-06-05 23:35:29,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:29,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:29,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313757308] [2021-06-05 23:35:29,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313757308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:29,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255377473] [2021-06-05 23:35:29,256 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 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 23:35:29,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:29,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:29,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:29,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:29,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255377473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:29,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:29,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 29 [2021-06-05 23:35:29,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068153322] [2021-06-05 23:35:29,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:35:29,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:35:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:29,644 INFO L87 Difference]: Start difference. First operand 376 states and 836 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:30,301 INFO L93 Difference]: Finished difference Result 658 states and 1384 transitions. [2021-06-05 23:35:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 23:35:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:30,304 INFO L225 Difference]: With dead ends: 658 [2021-06-05 23:35:30,304 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 23:35:30,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 742.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1918, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:35:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 23:35:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 458. [2021-06-05 23:35:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.2450765864332602) internal successors, (1026), 457 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1026 transitions. [2021-06-05 23:35:30,310 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1026 transitions. Word has length 27 [2021-06-05 23:35:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:30,310 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1026 transitions. [2021-06-05 23:35:30,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1026 transitions. [2021-06-05 23:35:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:30,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:30,311 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:30,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 23:35:30,523 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:30,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:30,524 INFO L82 PathProgramCache]: Analyzing trace with hash -685899762, now seen corresponding path program 39 times [2021-06-05 23:35:30,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:30,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705775470] [2021-06-05 23:35:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:30,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:30,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705775470] [2021-06-05 23:35:30,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705775470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:30,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026545923] [2021-06-05 23:35:30,750 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 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 23:35:30,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:35:30,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:31,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026545923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:31,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:31,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-06-05 23:35:31,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358485492] [2021-06-05 23:35:31,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:31,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:31,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:31,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:31,118 INFO L87 Difference]: Start difference. First operand 458 states and 1026 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:32,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:32,340 INFO L93 Difference]: Finished difference Result 751 states and 1599 transitions. [2021-06-05 23:35:32,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:35:32,340 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:32,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:32,342 INFO L225 Difference]: With dead ends: 751 [2021-06-05 23:35:32,342 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 23:35:32,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1222.1ms TimeCoverageRelationStatistics Valid=578, Invalid=3454, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:35:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 23:35:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 401. [2021-06-05 23:35:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.23) internal successors, (892), 400 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 892 transitions. [2021-06-05 23:35:32,349 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 892 transitions. Word has length 27 [2021-06-05 23:35:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:32,349 INFO L482 AbstractCegarLoop]: Abstraction has 401 states and 892 transitions. [2021-06-05 23:35:32,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 892 transitions. [2021-06-05 23:35:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:32,349 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:32,349 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:32,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 23:35:32,565 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash -620373174, now seen corresponding path program 40 times [2021-06-05 23:35:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:32,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021571350] [2021-06-05 23:35:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:32,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021571350] [2021-06-05 23:35:32,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021571350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:32,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397931028] [2021-06-05 23:35:32,718 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 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 23:35:32,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:32,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:32,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:32,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:33,090 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 23:35:33,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397931028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:33,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:33,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 23:35:33,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002652991] [2021-06-05 23:35:33,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:33,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:33,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:33,091 INFO L87 Difference]: Start difference. First operand 401 states and 892 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:33,632 INFO L93 Difference]: Finished difference Result 681 states and 1412 transitions. [2021-06-05 23:35:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:35:33,632 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:33,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:33,634 INFO L225 Difference]: With dead ends: 681 [2021-06-05 23:35:33,634 INFO L226 Difference]: Without dead ends: 667 [2021-06-05 23:35:33,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 682.2ms TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:35:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-06-05 23:35:33,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 473. [2021-06-05 23:35:33,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.266949152542373) internal successors, (1070), 472 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1070 transitions. [2021-06-05 23:35:33,640 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1070 transitions. Word has length 27 [2021-06-05 23:35:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:33,640 INFO L482 AbstractCegarLoop]: Abstraction has 473 states and 1070 transitions. [2021-06-05 23:35:33,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1070 transitions. [2021-06-05 23:35:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:33,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:33,641 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:33,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:33,849 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1994097482, now seen corresponding path program 41 times [2021-06-05 23:35:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:33,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126031655] [2021-06-05 23:35:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:34,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126031655] [2021-06-05 23:35:34,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126031655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:34,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259937779] [2021-06-05 23:35:34,001 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 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 23:35:34,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:35:34,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:34,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:34,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:34,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:34,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259937779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:34,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:34,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 23:35:34,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444355645] [2021-06-05 23:35:34,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:35:34,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:35:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:34,370 INFO L87 Difference]: Start difference. First operand 473 states and 1070 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:35,447 INFO L93 Difference]: Finished difference Result 783 states and 1648 transitions. [2021-06-05 23:35:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 23:35:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:35,450 INFO L225 Difference]: With dead ends: 783 [2021-06-05 23:35:35,450 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 23:35:35,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1107.2ms TimeCoverageRelationStatistics Valid=501, Invalid=3281, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 23:35:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 23:35:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 474. [2021-06-05 23:35:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.2769556025369977) internal successors, (1077), 473 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1077 transitions. [2021-06-05 23:35:35,457 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1077 transitions. Word has length 27 [2021-06-05 23:35:35,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:35,457 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1077 transitions. [2021-06-05 23:35:35,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:35,457 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1077 transitions. [2021-06-05 23:35:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:35,457 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:35,457 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:35,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 23:35:35,658 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:35,658 INFO L82 PathProgramCache]: Analyzing trace with hash -604296374, now seen corresponding path program 42 times [2021-06-05 23:35:35,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:35,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992597512] [2021-06-05 23:35:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:35,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:35,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992597512] [2021-06-05 23:35:35,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992597512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:35,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461004367] [2021-06-05 23:35:35,799 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 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 23:35:35,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:35:35,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:35,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:35,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:36,135 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 23:35:36,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461004367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:36,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:36,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 23:35:36,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801148168] [2021-06-05 23:35:36,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:36,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:36,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:36,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:36,136 INFO L87 Difference]: Start difference. First operand 474 states and 1077 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:37,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:37,824 INFO L93 Difference]: Finished difference Result 813 states and 1728 transitions. [2021-06-05 23:35:37,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 23:35:37,824 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:37,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:37,827 INFO L225 Difference]: With dead ends: 813 [2021-06-05 23:35:37,827 INFO L226 Difference]: Without dead ends: 777 [2021-06-05 23:35:37,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1462.8ms TimeCoverageRelationStatistics Valid=700, Invalid=4556, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 23:35:37,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-06-05 23:35:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 467. [2021-06-05 23:35:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 2.2618025751072963) internal successors, (1054), 466 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1054 transitions. [2021-06-05 23:35:37,834 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1054 transitions. Word has length 27 [2021-06-05 23:35:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:37,834 INFO L482 AbstractCegarLoop]: Abstraction has 467 states and 1054 transitions. [2021-06-05 23:35:37,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1054 transitions. [2021-06-05 23:35:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:37,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:37,835 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:38,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:38,035 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1347790654, now seen corresponding path program 43 times [2021-06-05 23:35:38,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:38,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366847425] [2021-06-05 23:35:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:38,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:38,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366847425] [2021-06-05 23:35:38,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366847425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:38,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982123520] [2021-06-05 23:35:38,208 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 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 23:35:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:38,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:38,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982123520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:38,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:38,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 23:35:38,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165831499] [2021-06-05 23:35:38,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:38,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:38,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:38,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:38,523 INFO L87 Difference]: Start difference. First operand 467 states and 1054 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:39,264 INFO L93 Difference]: Finished difference Result 765 states and 1611 transitions. [2021-06-05 23:35:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:35:39,264 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:39,266 INFO L225 Difference]: With dead ends: 765 [2021-06-05 23:35:39,266 INFO L226 Difference]: Without dead ends: 739 [2021-06-05 23:35:39,267 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 755.8ms TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:35:39,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-06-05 23:35:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 506. [2021-06-05 23:35:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.257425742574257) internal successors, (1140), 505 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:39,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1140 transitions. [2021-06-05 23:35:39,273 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1140 transitions. Word has length 27 [2021-06-05 23:35:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:39,273 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1140 transitions. [2021-06-05 23:35:39,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1140 transitions. [2021-06-05 23:35:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:39,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:39,274 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:39,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 23:35:39,483 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1615085958, now seen corresponding path program 44 times [2021-06-05 23:35:39,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:39,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787081431] [2021-06-05 23:35:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:39,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:39,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787081431] [2021-06-05 23:35:39,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787081431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:39,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128631586] [2021-06-05 23:35:39,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:35:39,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:39,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:39,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:39,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:40,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128631586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:40,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:40,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-05 23:35:40,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717080203] [2021-06-05 23:35:40,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:35:40,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:40,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:35:40,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:40,041 INFO L87 Difference]: Start difference. First operand 506 states and 1140 transitions. Second operand has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:40,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:40,993 INFO L93 Difference]: Finished difference Result 878 states and 1897 transitions. [2021-06-05 23:35:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:35:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:40,995 INFO L225 Difference]: With dead ends: 878 [2021-06-05 23:35:40,995 INFO L226 Difference]: Without dead ends: 842 [2021-06-05 23:35:40,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 967.9ms TimeCoverageRelationStatistics Valid=515, Invalid=2241, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:35:40,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-06-05 23:35:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 455. [2021-06-05 23:35:41,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.251101321585903) internal successors, (1022), 454 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:41,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1022 transitions. [2021-06-05 23:35:41,001 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1022 transitions. Word has length 27 [2021-06-05 23:35:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:41,001 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1022 transitions. [2021-06-05 23:35:41,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1022 transitions. [2021-06-05 23:35:41,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:41,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:41,002 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:41,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:41,202 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash -735982520, now seen corresponding path program 45 times [2021-06-05 23:35:41,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:41,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121404] [2021-06-05 23:35:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:41,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:41,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121404] [2021-06-05 23:35:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404190055] [2021-06-05 23:35:41,396 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 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 23:35:41,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:35:41,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:41,416 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:35:41,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:41,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404190055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:41,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:41,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 23:35:41,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060010531] [2021-06-05 23:35:41,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:35:41,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:35:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:41,786 INFO L87 Difference]: Start difference. First operand 455 states and 1022 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:42,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:42,568 INFO L93 Difference]: Finished difference Result 619 states and 1331 transitions. [2021-06-05 23:35:42,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:35:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:42,570 INFO L225 Difference]: With dead ends: 619 [2021-06-05 23:35:42,570 INFO L226 Difference]: Without dead ends: 545 [2021-06-05 23:35:42,570 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 884.6ms TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:35:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-06-05 23:35:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 500. [2021-06-05 23:35:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.1983967935871744) internal successors, (1097), 499 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1097 transitions. [2021-06-05 23:35:42,580 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1097 transitions. Word has length 29 [2021-06-05 23:35:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:42,580 INFO L482 AbstractCegarLoop]: Abstraction has 500 states and 1097 transitions. [2021-06-05 23:35:42,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1097 transitions. [2021-06-05 23:35:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:42,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:42,581 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:42,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 23:35:42,789 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:42,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1495767748, now seen corresponding path program 46 times [2021-06-05 23:35:42,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:42,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210511873] [2021-06-05 23:35:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:42,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:42,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210511873] [2021-06-05 23:35:42,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210511873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:42,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155929797] [2021-06-05 23:35:42,962 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 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 23:35:42,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:42,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:42,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:35:42,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:43,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:43,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155929797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:43,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:43,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 23:35:43,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406490993] [2021-06-05 23:35:43,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:35:43,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:43,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:35:43,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:43,349 INFO L87 Difference]: Start difference. First operand 500 states and 1097 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:44,282 INFO L93 Difference]: Finished difference Result 591 states and 1253 transitions. [2021-06-05 23:35:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 23:35:44,283 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:44,284 INFO L225 Difference]: With dead ends: 591 [2021-06-05 23:35:44,284 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 23:35:44,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 1031.8ms TimeCoverageRelationStatistics Valid=411, Invalid=2781, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 23:35:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 23:35:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 503. [2021-06-05 23:35:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.195219123505976) internal successors, (1102), 502 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1102 transitions. [2021-06-05 23:35:44,290 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1102 transitions. Word has length 29 [2021-06-05 23:35:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:44,290 INFO L482 AbstractCegarLoop]: Abstraction has 503 states and 1102 transitions. [2021-06-05 23:35:44,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1102 transitions. [2021-06-05 23:35:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:44,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:44,291 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:44,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 23:35:44,492 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:44,492 INFO L82 PathProgramCache]: Analyzing trace with hash -719905720, now seen corresponding path program 47 times [2021-06-05 23:35:44,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:44,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557346760] [2021-06-05 23:35:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:44,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:44,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557346760] [2021-06-05 23:35:44,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557346760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:44,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905565448] [2021-06-05 23:35:44,672 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 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 23:35:44,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:35:44,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:44,693 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:35:44,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:45,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905565448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:45,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:45,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-06-05 23:35:45,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962554910] [2021-06-05 23:35:45,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:35:45,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:45,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:35:45,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:45,058 INFO L87 Difference]: Start difference. First operand 503 states and 1102 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:46,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:46,370 INFO L93 Difference]: Finished difference Result 627 states and 1326 transitions. [2021-06-05 23:35:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 23:35:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:46,372 INFO L225 Difference]: With dead ends: 627 [2021-06-05 23:35:46,372 INFO L226 Difference]: Without dead ends: 601 [2021-06-05 23:35:46,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1234.8ms TimeCoverageRelationStatistics Valid=555, Invalid=3351, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 23:35:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-06-05 23:35:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 485. [2021-06-05 23:35:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.2024793388429753) internal successors, (1066), 484 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1066 transitions. [2021-06-05 23:35:46,378 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1066 transitions. Word has length 29 [2021-06-05 23:35:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:46,378 INFO L482 AbstractCegarLoop]: Abstraction has 485 states and 1066 transitions. [2021-06-05 23:35:46,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1066 transitions. [2021-06-05 23:35:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:46,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:46,379 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:46,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 23:35:46,579 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:46,580 INFO L82 PathProgramCache]: Analyzing trace with hash -682384688, now seen corresponding path program 48 times [2021-06-05 23:35:46,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:46,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956871534] [2021-06-05 23:35:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:35:46,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956871534] [2021-06-05 23:35:46,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956871534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901581328] [2021-06-05 23:35:46,741 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 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 23:35:46,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:35:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:46,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:35:46,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:47,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901581328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:47,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:47,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:35:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953559727] [2021-06-05 23:35:47,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:35:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:35:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:47,203 INFO L87 Difference]: Start difference. First operand 485 states and 1066 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:48,067 INFO L93 Difference]: Finished difference Result 685 states and 1451 transitions. [2021-06-05 23:35:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 23:35:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:48,069 INFO L225 Difference]: With dead ends: 685 [2021-06-05 23:35:48,069 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 23:35:48,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1026.3ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:35:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 23:35:48,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 525. [2021-06-05 23:35:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.1946564885496183) internal successors, (1150), 524 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:48,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1150 transitions. [2021-06-05 23:35:48,075 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1150 transitions. Word has length 29 [2021-06-05 23:35:48,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:48,075 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1150 transitions. [2021-06-05 23:35:48,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1150 transitions. [2021-06-05 23:35:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:48,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:48,076 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:48,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:48,281 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:48,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:48,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1499797836, now seen corresponding path program 49 times [2021-06-05 23:35:48,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:48,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990355333] [2021-06-05 23:35:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:35:48,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990355333] [2021-06-05 23:35:48,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990355333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291270415] [2021-06-05 23:35:48,443 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 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 23:35:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:48,464 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:35:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:48,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291270415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:48,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:48,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:35:48,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730518280] [2021-06-05 23:35:48,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:35:48,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:48,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:35:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:48,845 INFO L87 Difference]: Start difference. First operand 525 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:49,956 INFO L93 Difference]: Finished difference Result 696 states and 1471 transitions. [2021-06-05 23:35:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:35:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:49,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:49,958 INFO L225 Difference]: With dead ends: 696 [2021-06-05 23:35:49,958 INFO L226 Difference]: Without dead ends: 672 [2021-06-05 23:35:49,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 1216.2ms TimeCoverageRelationStatistics Valid=522, Invalid=3510, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 23:35:49,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-05 23:35:49,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 528. [2021-06-05 23:35:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.1916508538899433) internal successors, (1155), 527 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1155 transitions. [2021-06-05 23:35:49,965 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1155 transitions. Word has length 29 [2021-06-05 23:35:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:49,965 INFO L482 AbstractCegarLoop]: Abstraction has 528 states and 1155 transitions. [2021-06-05 23:35:49,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1155 transitions. [2021-06-05 23:35:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:49,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:49,965 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:50,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:50,166 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:50,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:50,166 INFO L82 PathProgramCache]: Analyzing trace with hash -715875632, now seen corresponding path program 50 times [2021-06-05 23:35:50,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:50,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300682381] [2021-06-05 23:35:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:35:50,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300682381] [2021-06-05 23:35:50,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300682381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672863905] [2021-06-05 23:35:50,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:35:50,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:50,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:50,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:35:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:50,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672863905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:50,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:50,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:35:50,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811044707] [2021-06-05 23:35:50,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:35:50,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:50,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:35:50,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:50,765 INFO L87 Difference]: Start difference. First operand 528 states and 1155 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:52,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:52,131 INFO L93 Difference]: Finished difference Result 739 states and 1557 transitions. [2021-06-05 23:35:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 23:35:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:52,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:52,134 INFO L225 Difference]: With dead ends: 739 [2021-06-05 23:35:52,134 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 23:35:52,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1386.9ms TimeCoverageRelationStatistics Valid=657, Invalid=3633, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:35:52,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 23:35:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 511. [2021-06-05 23:35:52,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.1921568627450982) internal successors, (1118), 510 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1118 transitions. [2021-06-05 23:35:52,140 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1118 transitions. Word has length 29 [2021-06-05 23:35:52,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:52,140 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1118 transitions. [2021-06-05 23:35:52,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:52,140 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1118 transitions. [2021-06-05 23:35:52,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:52,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:52,141 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:52,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:52,349 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash -353926280, now seen corresponding path program 51 times [2021-06-05 23:35:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:52,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403054176] [2021-06-05 23:35:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:52,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:52,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:52,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403054176] [2021-06-05 23:35:52,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403054176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:52,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570036006] [2021-06-05 23:35:52,554 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:35:52,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:35:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:35:52,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:52,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570036006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:52,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:52,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 23:35:52,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639751142] [2021-06-05 23:35:52,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:35:52,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:52,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:35:52,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:52,982 INFO L87 Difference]: Start difference. First operand 511 states and 1118 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:53,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:53,906 INFO L93 Difference]: Finished difference Result 724 states and 1531 transitions. [2021-06-05 23:35:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:35:53,907 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:53,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:53,908 INFO L225 Difference]: With dead ends: 724 [2021-06-05 23:35:53,908 INFO L226 Difference]: Without dead ends: 647 [2021-06-05 23:35:53,908 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1022.5ms TimeCoverageRelationStatistics Valid=324, Invalid=2328, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 23:35:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-06-05 23:35:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 527. [2021-06-05 23:35:53,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.1863117870722433) internal successors, (1150), 526 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1150 transitions. [2021-06-05 23:35:53,914 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1150 transitions. Word has length 29 [2021-06-05 23:35:53,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:53,914 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1150 transitions. [2021-06-05 23:35:53,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:53,914 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1150 transitions. [2021-06-05 23:35:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:53,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:53,915 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:54,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:54,125 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:54,125 INFO L82 PathProgramCache]: Analyzing trace with hash 2048232520, now seen corresponding path program 52 times [2021-06-05 23:35:54,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:54,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370798641] [2021-06-05 23:35:54,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:54,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370798641] [2021-06-05 23:35:54,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370798641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:54,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538606899] [2021-06-05 23:35:54,269 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 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 23:35:54,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:54,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:54,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:35:54,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:54,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538606899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:54,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:54,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:35:54,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743034904] [2021-06-05 23:35:54,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:35:54,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:35:54,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:54,639 INFO L87 Difference]: Start difference. First operand 527 states and 1150 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:55,483 INFO L93 Difference]: Finished difference Result 754 states and 1604 transitions. [2021-06-05 23:35:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:35:55,483 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:35:55,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:55,484 INFO L225 Difference]: With dead ends: 754 [2021-06-05 23:35:55,484 INFO L226 Difference]: Without dead ends: 702 [2021-06-05 23:35:55,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 941.9ms TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 23:35:55,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-06-05 23:35:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 611. [2021-06-05 23:35:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.181967213114754) internal successors, (1331), 610 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1331 transitions. [2021-06-05 23:35:55,491 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1331 transitions. Word has length 29 [2021-06-05 23:35:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:55,491 INFO L482 AbstractCegarLoop]: Abstraction has 611 states and 1331 transitions. [2021-06-05 23:35:55,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1331 transitions. [2021-06-05 23:35:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:55,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:55,492 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:55,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-06-05 23:35:55,701 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash -14984508, now seen corresponding path program 53 times [2021-06-05 23:35:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:55,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682396744] [2021-06-05 23:35:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:55,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:55,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682396744] [2021-06-05 23:35:55,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682396744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:55,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291839519] [2021-06-05 23:35:55,858 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 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 23:35:55,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:35:55,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:55,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:35:55,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:56,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291839519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:56,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:56,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-06-05 23:35:56,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580399243] [2021-06-05 23:35:56,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 23:35:56,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:56,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 23:35:56,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:56,516 INFO L87 Difference]: Start difference. First operand 611 states and 1331 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 23:35:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:58,257 INFO L93 Difference]: Finished difference Result 840 states and 1779 transitions. [2021-06-05 23:35:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 23:35:58,258 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 29 [2021-06-05 23:35:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:58,259 INFO L225 Difference]: With dead ends: 840 [2021-06-05 23:35:58,259 INFO L226 Difference]: Without dead ends: 818 [2021-06-05 23:35:58,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1370 ImplicationChecksByTransitivity, 1935.6ms TimeCoverageRelationStatistics Valid=598, Invalid=4232, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 23:35:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-06-05 23:35:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 654. [2021-06-05 23:35:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.1852986217457886) internal successors, (1427), 653 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1427 transitions. [2021-06-05 23:35:58,266 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1427 transitions. Word has length 29 [2021-06-05 23:35:58,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:58,266 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1427 transitions. [2021-06-05 23:35:58,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 23:35:58,266 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1427 transitions. [2021-06-05 23:35:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:35:58,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:58,267 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:58,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:58,470 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:58,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash 2064309320, now seen corresponding path program 54 times [2021-06-05 23:35:58,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:58,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780405612] [2021-06-05 23:35:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:58,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780405612] [2021-06-05 23:35:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780405612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:58,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406218460] [2021-06-05 23:35:58,659 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 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 23:35:58,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:35:58,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:58,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:35:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:59,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406218460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:59,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:59,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:35:59,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057131414] [2021-06-05 23:35:59,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:35:59,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:59,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:35:59,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:59,056 INFO L87 Difference]: Start difference. First operand 654 states and 1427 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:00,710 INFO L93 Difference]: Finished difference Result 877 states and 1853 transitions. [2021-06-05 23:36:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 23:36:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:00,712 INFO L225 Difference]: With dead ends: 877 [2021-06-05 23:36:00,712 INFO L226 Difference]: Without dead ends: 847 [2021-06-05 23:36:00,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 1625.9ms TimeCoverageRelationStatistics Valid=841, Invalid=4859, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 23:36:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-06-05 23:36:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 593. [2021-06-05 23:36:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.1655405405405403) internal successors, (1282), 592 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1282 transitions. [2021-06-05 23:36:00,719 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1282 transitions. Word has length 29 [2021-06-05 23:36:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:00,719 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1282 transitions. [2021-06-05 23:36:00,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1282 transitions. [2021-06-05 23:36:00,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:00,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:00,720 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:00,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-05 23:36:00,930 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:00,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:00,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1014858316, now seen corresponding path program 55 times [2021-06-05 23:36:00,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:00,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534339179] [2021-06-05 23:36:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:01,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:01,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534339179] [2021-06-05 23:36:01,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534339179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:01,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671734318] [2021-06-05 23:36:01,094 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 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 23:36:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:01,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671734318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:01,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:01,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 23:36:01,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807636809] [2021-06-05 23:36:01,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:01,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:01,551 INFO L87 Difference]: Start difference. First operand 593 states and 1282 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:02,281 INFO L93 Difference]: Finished difference Result 753 states and 1591 transitions. [2021-06-05 23:36:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 23:36:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:02,282 INFO L225 Difference]: With dead ends: 753 [2021-06-05 23:36:02,282 INFO L226 Difference]: Without dead ends: 731 [2021-06-05 23:36:02,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 922.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1878, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:36:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-06-05 23:36:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 618. [2021-06-05 23:36:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 2.1620745542949757) internal successors, (1334), 617 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:02,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1334 transitions. [2021-06-05 23:36:02,289 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1334 transitions. Word has length 29 [2021-06-05 23:36:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:02,289 INFO L482 AbstractCegarLoop]: Abstraction has 618 states and 1334 transitions. [2021-06-05 23:36:02,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1334 transitions. [2021-06-05 23:36:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:02,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:02,290 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:02,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 23:36:02,505 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1064435512, now seen corresponding path program 56 times [2021-06-05 23:36:02,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:02,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501463400] [2021-06-05 23:36:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:02,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:02,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:02,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501463400] [2021-06-05 23:36:02,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501463400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:02,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760832849] [2021-06-05 23:36:02,672 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:36:02,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:03,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760832849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:03,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:03,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 23:36:03,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098746775] [2021-06-05 23:36:03,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:03,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:03,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:03,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:03,156 INFO L87 Difference]: Start difference. First operand 618 states and 1334 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:04,004 INFO L93 Difference]: Finished difference Result 872 states and 1845 transitions. [2021-06-05 23:36:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:36:04,004 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:04,006 INFO L225 Difference]: With dead ends: 872 [2021-06-05 23:36:04,006 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 23:36:04,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1002.1ms TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:36:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 23:36:04,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 617. [2021-06-05 23:36:04,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 2.1623376623376624) internal successors, (1332), 616 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:04,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1332 transitions. [2021-06-05 23:36:04,012 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1332 transitions. Word has length 29 [2021-06-05 23:36:04,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:04,013 INFO L482 AbstractCegarLoop]: Abstraction has 617 states and 1332 transitions. [2021-06-05 23:36:04,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:04,013 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1332 transitions. [2021-06-05 23:36:04,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:04,013 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:04,013 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:04,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:04,229 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash -11275644, now seen corresponding path program 57 times [2021-06-05 23:36:04,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:04,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163991676] [2021-06-05 23:36:04,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:04,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:04,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163991676] [2021-06-05 23:36:04,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163991676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:04,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800197767] [2021-06-05 23:36:04,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:04,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:36:04,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:04,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:04,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800197767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:04,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:04,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 23:36:04,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742307534] [2021-06-05 23:36:04,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:04,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:04,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:04,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:04,934 INFO L87 Difference]: Start difference. First operand 617 states and 1332 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:05,784 INFO L93 Difference]: Finished difference Result 1003 states and 2135 transitions. [2021-06-05 23:36:05,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:36:05,784 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:05,785 INFO L225 Difference]: With dead ends: 1003 [2021-06-05 23:36:05,785 INFO L226 Difference]: Without dead ends: 970 [2021-06-05 23:36:05,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1055.4ms TimeCoverageRelationStatistics Valid=330, Invalid=2120, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:36:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-06-05 23:36:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 603. [2021-06-05 23:36:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 2.1627906976744184) internal successors, (1302), 602 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:05,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1302 transitions. [2021-06-05 23:36:05,793 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1302 transitions. Word has length 29 [2021-06-05 23:36:05,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:05,793 INFO L482 AbstractCegarLoop]: Abstraction has 603 states and 1302 transitions. [2021-06-05 23:36:05,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:05,793 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1302 transitions. [2021-06-05 23:36:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:05,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:05,793 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:05,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:05,997 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:05,997 INFO L82 PathProgramCache]: Analyzing trace with hash -992806576, now seen corresponding path program 58 times [2021-06-05 23:36:05,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:05,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253727679] [2021-06-05 23:36:05,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:36:06,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:06,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253727679] [2021-06-05 23:36:06,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253727679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:06,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134505512] [2021-06-05 23:36:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:06,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:06,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:36:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:06,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134505512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:06,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:06,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:36:06,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536267757] [2021-06-05 23:36:06,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:36:06,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:36:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:36:06,542 INFO L87 Difference]: Start difference. First operand 603 states and 1302 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:07,287 INFO L93 Difference]: Finished difference Result 675 states and 1425 transitions. [2021-06-05 23:36:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 23:36:07,288 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:07,289 INFO L225 Difference]: With dead ends: 675 [2021-06-05 23:36:07,289 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 23:36:07,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 920.5ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:36:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 23:36:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 576. [2021-06-05 23:36:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 2.017391304347826) internal successors, (1160), 575 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1160 transitions. [2021-06-05 23:36:07,294 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1160 transitions. Word has length 29 [2021-06-05 23:36:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:07,294 INFO L482 AbstractCegarLoop]: Abstraction has 576 states and 1160 transitions. [2021-06-05 23:36:07,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1160 transitions. [2021-06-05 23:36:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:07,295 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:07,295 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:07,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:07,512 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1189375948, now seen corresponding path program 59 times [2021-06-05 23:36:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:07,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495729343] [2021-06-05 23:36:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:07,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:36:07,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495729343] [2021-06-05 23:36:07,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495729343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:07,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234292826] [2021-06-05 23:36:07,676 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 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 23:36:07,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:36:07,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:07,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:36:07,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:08,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234292826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:08,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:08,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:36:08,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793654546] [2021-06-05 23:36:08,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:36:08,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:36:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:36:08,083 INFO L87 Difference]: Start difference. First operand 576 states and 1160 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:09,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:09,217 INFO L93 Difference]: Finished difference Result 703 states and 1407 transitions. [2021-06-05 23:36:09,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 23:36:09,218 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:09,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:09,219 INFO L225 Difference]: With dead ends: 703 [2021-06-05 23:36:09,219 INFO L226 Difference]: Without dead ends: 679 [2021-06-05 23:36:09,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1270.6ms TimeCoverageRelationStatistics Valid=540, Invalid=3750, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 23:36:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-06-05 23:36:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 583. [2021-06-05 23:36:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 2.0051546391752577) internal successors, (1167), 582 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1167 transitions. [2021-06-05 23:36:09,225 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1167 transitions. Word has length 29 [2021-06-05 23:36:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:09,225 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1167 transitions. [2021-06-05 23:36:09,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1167 transitions. [2021-06-05 23:36:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:09,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:09,226 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:09,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 23:36:09,439 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1026297520, now seen corresponding path program 60 times [2021-06-05 23:36:09,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:09,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659456026] [2021-06-05 23:36:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 23:36:09,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:09,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659456026] [2021-06-05 23:36:09,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659456026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:09,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55295719] [2021-06-05 23:36:09,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:36:09,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:36:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:09,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:36:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:09,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55295719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:09,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:09,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2021-06-05 23:36:09,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122614930] [2021-06-05 23:36:09,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:36:09,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:09,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:36:09,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:36:09,999 INFO L87 Difference]: Start difference. First operand 583 states and 1167 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:11,407 INFO L93 Difference]: Finished difference Result 756 states and 1505 transitions. [2021-06-05 23:36:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 23:36:11,407 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:11,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:11,408 INFO L225 Difference]: With dead ends: 756 [2021-06-05 23:36:11,408 INFO L226 Difference]: Without dead ends: 730 [2021-06-05 23:36:11,409 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1397.7ms TimeCoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 23:36:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-06-05 23:36:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 457. [2021-06-05 23:36:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.9956140350877194) internal successors, (910), 456 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:11,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 910 transitions. [2021-06-05 23:36:11,414 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 910 transitions. Word has length 29 [2021-06-05 23:36:11,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:11,414 INFO L482 AbstractCegarLoop]: Abstraction has 457 states and 910 transitions. [2021-06-05 23:36:11,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:11,414 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 910 transitions. [2021-06-05 23:36:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:11,414 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:11,415 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:11,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 23:36:11,618 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:11,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:11,619 INFO L82 PathProgramCache]: Analyzing trace with hash -664348168, now seen corresponding path program 61 times [2021-06-05 23:36:11,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:11,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716240611] [2021-06-05 23:36:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:11,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716240611] [2021-06-05 23:36:11,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716240611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:11,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257174710] [2021-06-05 23:36:11,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:11,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:36:11,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:12,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257174710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:12,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:12,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 23:36:12,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108824912] [2021-06-05 23:36:12,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:12,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:12,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:12,200 INFO L87 Difference]: Start difference. First operand 457 states and 910 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:12,912 INFO L93 Difference]: Finished difference Result 708 states and 1404 transitions. [2021-06-05 23:36:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 23:36:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:12,913 INFO L225 Difference]: With dead ends: 708 [2021-06-05 23:36:12,913 INFO L226 Difference]: Without dead ends: 683 [2021-06-05 23:36:12,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 913.1ms TimeCoverageRelationStatistics Valid=277, Invalid=1979, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 23:36:12,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-06-05 23:36:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 517. [2021-06-05 23:36:12,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.996124031007752) internal successors, (1030), 516 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:12,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1030 transitions. [2021-06-05 23:36:12,918 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1030 transitions. Word has length 29 [2021-06-05 23:36:12,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:12,918 INFO L482 AbstractCegarLoop]: Abstraction has 517 states and 1030 transitions. [2021-06-05 23:36:12,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1030 transitions. [2021-06-05 23:36:12,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:12,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:12,919 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:13,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 23:36:13,135 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:13,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:13,135 INFO L82 PathProgramCache]: Analyzing trace with hash 211415604, now seen corresponding path program 62 times [2021-06-05 23:36:13,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:13,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998066903] [2021-06-05 23:36:13,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:13,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:13,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998066903] [2021-06-05 23:36:13,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998066903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:13,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332300495] [2021-06-05 23:36:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 23:36:13,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:36:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:13,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332300495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:13,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:13,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2021-06-05 23:36:13,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188253499] [2021-06-05 23:36:13,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:13,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:13,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:13,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:13,788 INFO L87 Difference]: Start difference. First operand 517 states and 1030 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:14,803 INFO L93 Difference]: Finished difference Result 722 states and 1434 transitions. [2021-06-05 23:36:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 23:36:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:14,804 INFO L225 Difference]: With dead ends: 722 [2021-06-05 23:36:14,804 INFO L226 Difference]: Without dead ends: 693 [2021-06-05 23:36:14,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1218.0ms TimeCoverageRelationStatistics Valid=356, Invalid=2614, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:36:14,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-06-05 23:36:14,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 303. [2021-06-05 23:36:14,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.9801324503311257) internal successors, (598), 302 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:14,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 598 transitions. [2021-06-05 23:36:14,808 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 598 transitions. Word has length 29 [2021-06-05 23:36:14,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:14,808 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 598 transitions. [2021-06-05 23:36:14,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:14,809 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 598 transitions. [2021-06-05 23:36:14,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:14,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:14,809 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:15,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:15,021 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash -758525832, now seen corresponding path program 63 times [2021-06-05 23:36:15,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:15,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756828312] [2021-06-05 23:36:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:15,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756828312] [2021-06-05 23:36:15,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756828312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962203677] [2021-06-05 23:36:15,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:15,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:36:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:36:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:15,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962203677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:15,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:15,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 23:36:15,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896231661] [2021-06-05 23:36:15,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:36:15,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:36:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:36:15,666 INFO L87 Difference]: Start difference. First operand 303 states and 598 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:16,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:16,625 INFO L93 Difference]: Finished difference Result 368 states and 721 transitions. [2021-06-05 23:36:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 23:36:16,625 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:36:16,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:16,625 INFO L225 Difference]: With dead ends: 368 [2021-06-05 23:36:16,625 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 23:36:16,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1131.6ms TimeCoverageRelationStatistics Valid=363, Invalid=2717, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 23:36:16,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 23:36:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 23:36:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 23:36:16,626 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-06-05 23:36:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:16,626 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 23:36:16,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 23:36:16,626 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 23:36:16,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 23:36:16,828 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:36:16,830 INFO L202 PluginConnector]: Adding new model threaded-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:36:16 BasicIcfg [2021-06-05 23:36:16,830 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:36:16,831 INFO L168 Benchmark]: Toolchain (without parser) took 111310.55 ms. Allocated memory was 354.4 MB in the beginning and 528.5 MB in the end (delta: 174.1 MB). Free memory was 333.6 MB in the beginning and 223.2 MB in the end (delta: 110.4 MB). Peak memory consumption was 287.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:16,831 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 354.4 MB. Free memory was 334.7 MB in the beginning and 334.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:36:16,831 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.41 ms. Allocated memory is still 354.4 MB. Free memory was 333.5 MB in the beginning and 332.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:36:16,831 INFO L168 Benchmark]: Boogie Preprocessor took 13.21 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 331.2 MB in the end (delta: 957.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:16,831 INFO L168 Benchmark]: RCFGBuilder took 251.14 ms. Allocated memory is still 354.4 MB. Free memory was 331.1 MB in the beginning and 319.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:16,831 INFO L168 Benchmark]: TraceAbstraction took 111022.19 ms. Allocated memory was 354.4 MB in the beginning and 528.5 MB in the end (delta: 174.1 MB). Free memory was 318.9 MB in the beginning and 223.2 MB in the end (delta: 95.6 MB). Peak memory consumption was 270.3 MB. Max. memory is 16.0 GB. [2021-06-05 23:36:16,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 354.4 MB. Free memory was 334.7 MB in the beginning and 334.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.41 ms. Allocated memory is still 354.4 MB. Free memory was 333.5 MB in the beginning and 332.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.21 ms. Allocated memory is still 354.4 MB. Free memory was 332.1 MB in the beginning and 331.2 MB in the end (delta: 957.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 251.14 ms. Allocated memory is still 354.4 MB. Free memory was 331.1 MB in the beginning and 319.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 111022.19 ms. Allocated memory was 354.4 MB in the beginning and 528.5 MB in the end (delta: 174.1 MB). Free memory was 318.9 MB in the beginning and 223.2 MB in the end (delta: 95.6 MB). Peak memory consumption was 270.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 55]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 110923.8ms, OverallIterations: 65, TraceHistogramMax: 4, EmptinessCheckTime: 41.0ms, AutomataDifference: 61048.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1312 SDtfs, 8575 SDslu, 14141 SDs, 0 SdLazy, 47169 SolverSat, 4093 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17747.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4260 GetRequests, 814 SyntacticMatches, 135 SemanticMatches, 3311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57379 ImplicationChecksByTransitivity, 65730.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=654occurred in iteration=55, InterpolantAutomatonStates: 2580, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 338.6ms AutomataMinimizationTime, 65 MinimizatonAttempts, 10402 StatesRemovedByMinimization, 63 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 179.6ms SsaConstructionTime, 482.8ms SatisfiabilityAnalysisTime, 34532.5ms InterpolantComputationTime, 3377 NumberOfCodeBlocks, 3377 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 3250 ConstructedInterpolants, 0 QuantifiedInterpolants, 55612 SizeOfPredicates, 310 NumberOfNonLiveVariables, 2754 ConjunctsInSsa, 1275 ConjunctsInUnsatCore, 127 InterpolantComputations, 3 PerfectInterpolantSequences, 67/1839 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...