/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/commit-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:27:13,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:27:13,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:27:13,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:27:13,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 23:27:13,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 23:27:13,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 23:27:13,716 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 23:27:13,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:27:13,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:27:13,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:27:13,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:27:13,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:27:13,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:27:13,752 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:27:13,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:27:13,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:27:13,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:27:13,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:27:13,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:27:13,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:27:13,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:27:13,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:27:13,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:27:13,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:27:13,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:27:13,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:27:13,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:27:13,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:27:13,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:27:13,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:27:13,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:27:13,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:27:13,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:27:13,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:27:13,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:27:13,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:27:13,755 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:27:13,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:27:13,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:27:14,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:27:14,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:27:14,115 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:27:14,116 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:27:14,117 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:27:14,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl [2021-06-05 23:27:14,118 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-2.wvr.bpl' [2021-06-05 23:27:14,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:27:14,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:27:14,159 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:27:14,159 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:27:14,160 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:27:14,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:27:14,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:27:14,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:27:14,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:27:14,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... [2021-06-05 23:27:14,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:27:14,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:27:14,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:27:14,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:27:14,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:27:14,292 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:27:14,292 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:27:14,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:27:14,293 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:27:14,293 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:27:14,293 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:27:14,293 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:27:14,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:27:14,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:27:14,294 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:27:14,294 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:27:14,294 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:27:14,294 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 23:27:14,294 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 23:27:14,295 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 23:27:14,295 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 23:27:14,772 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:27:14,773 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 23:27:14,773 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 23:27:14,774 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 23:27:14,774 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 23:27:14,774 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 23:27:14,775 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:27:14 BoogieIcfgContainer [2021-06-05 23:27:14,775 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:27:14,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:27:14,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:27:14,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:27:14,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:27:14" (1/2) ... [2021-06-05 23:27:14,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc43cce and model type commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:27:14, skipping insertion in model container [2021-06-05 23:27:14,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:27:14" (2/2) ... [2021-06-05 23:27:14,781 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-2.wvr.bpl [2021-06-05 23:27:14,786 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:27:14,786 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:27:14,786 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:27:14,786 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:27:14,830 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 23:27:14,847 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 23:27:14,862 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:27:14,862 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:27:14,863 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:27:14,863 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:27:14,863 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:27:14,863 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:27:14,863 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:27:14,863 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:27:14,870 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 25 transitions, 82 flow [2021-06-05 23:27:14,880 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:27:14,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:14,889 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:14,889 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1687097808, now seen corresponding path program 1 times [2021-06-05 23:27:14,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:14,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446471243] [2021-06-05 23:27:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:15,026 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 23:27:15,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:15,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446471243] [2021-06-05 23:27:15,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446471243] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:15,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:15,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:27:15,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786345214] [2021-06-05 23:27:15,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:27:15,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:15,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:27:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:15,049 INFO L87 Difference]: Start difference. First operand has 51 states, 49 states have (on average 3.4081632653061225) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 23:27:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:15,093 INFO L93 Difference]: Finished difference Result 94 states and 326 transitions. [2021-06-05 23:27:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:27:15,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 23:27:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:15,105 INFO L225 Difference]: With dead ends: 94 [2021-06-05 23:27:15,105 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 23:27:15,107 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 23:27:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-06-05 23:27:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 3.5454545454545454) internal successors, (312), 88 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 312 transitions. [2021-06-05 23:27:15,158 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 312 transitions. Word has length 15 [2021-06-05 23:27:15,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:15,159 INFO L482 AbstractCegarLoop]: Abstraction has 89 states and 312 transitions. [2021-06-05 23:27:15,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 23:27:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 312 transitions. [2021-06-05 23:27:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:15,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:15,163 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:15,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:27:15,164 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash -759854521, now seen corresponding path program 1 times [2021-06-05 23:27:15,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:15,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535952185] [2021-06-05 23:27:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:15,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:15,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:15,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535952185] [2021-06-05 23:27:15,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535952185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:15,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561458992] [2021-06-05 23:27:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:15,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:15,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:27:15,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:15,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561458992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:15,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:15,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 23:27:15,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462210380] [2021-06-05 23:27:15,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:27:15,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:15,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:27:15,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:27:15,507 INFO L87 Difference]: Start difference. First operand 89 states and 312 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:15,537 INFO L93 Difference]: Finished difference Result 120 states and 425 transitions. [2021-06-05 23:27:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:27:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:15,541 INFO L225 Difference]: With dead ends: 120 [2021-06-05 23:27:15,541 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 23:27:15,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:27:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 23:27:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2021-06-05 23:27:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 3.5542168674698793) internal successors, (295), 83 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 295 transitions. [2021-06-05 23:27:15,556 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 295 transitions. Word has length 16 [2021-06-05 23:27:15,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:15,557 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 295 transitions. [2021-06-05 23:27:15,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 295 transitions. [2021-06-05 23:27:15,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:15,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:15,558 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:15,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 23:27:15,782 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:15,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:15,783 INFO L82 PathProgramCache]: Analyzing trace with hash -263000223, now seen corresponding path program 1 times [2021-06-05 23:27:15,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:15,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936153425] [2021-06-05 23:27:15,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:15,811 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 23:27:15,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:15,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936153425] [2021-06-05 23:27:15,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936153425] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:15,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:15,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:27:15,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606361747] [2021-06-05 23:27:15,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:27:15,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:15,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:27:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:15,813 INFO L87 Difference]: Start difference. First operand 84 states and 295 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:15,821 INFO L93 Difference]: Finished difference Result 129 states and 418 transitions. [2021-06-05 23:27:15,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:27:15,821 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:15,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:15,822 INFO L225 Difference]: With dead ends: 129 [2021-06-05 23:27:15,823 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 23:27:15,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 23:27:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2021-06-05 23:27:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 3.4742268041237114) internal successors, (337), 97 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 337 transitions. [2021-06-05 23:27:15,831 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 337 transitions. Word has length 16 [2021-06-05 23:27:15,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:15,831 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 337 transitions. [2021-06-05 23:27:15,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,831 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 337 transitions. [2021-06-05 23:27:15,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:15,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:15,832 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:15,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 23:27:15,832 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:15,833 INFO L82 PathProgramCache]: Analyzing trace with hash 675491683, now seen corresponding path program 1 times [2021-06-05 23:27:15,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:15,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383602116] [2021-06-05 23:27:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:15,879 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 23:27:15,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:15,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383602116] [2021-06-05 23:27:15,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383602116] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:15,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:15,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:27:15,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897061501] [2021-06-05 23:27:15,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:27:15,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:15,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:27:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:15,881 INFO L87 Difference]: Start difference. First operand 98 states and 337 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:15,890 INFO L93 Difference]: Finished difference Result 76 states and 237 transitions. [2021-06-05 23:27:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:27:15,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:15,894 INFO L225 Difference]: With dead ends: 76 [2021-06-05 23:27:15,894 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 23:27:15,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:15,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 23:27:15,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-06-05 23:27:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 3.3015873015873014) internal successors, (208), 63 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 208 transitions. [2021-06-05 23:27:15,897 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 208 transitions. Word has length 16 [2021-06-05 23:27:15,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:15,898 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 208 transitions. [2021-06-05 23:27:15,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:15,898 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 208 transitions. [2021-06-05 23:27:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:27:15,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:15,899 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:15,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 23:27:15,899 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:15,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:15,899 INFO L82 PathProgramCache]: Analyzing trace with hash 135060591, now seen corresponding path program 1 times [2021-06-05 23:27:15,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:15,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088745559] [2021-06-05 23:27:15,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:15,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:15,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088745559] [2021-06-05 23:27:15,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088745559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:15,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033929877] [2021-06-05 23:27:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:16,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:27:16,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:16,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:16,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033929877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:16,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:16,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 23:27:16,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818599174] [2021-06-05 23:27:16,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:27:16,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:16,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:27:16,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:27:16,129 INFO L87 Difference]: Start difference. First operand 64 states and 208 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:16,151 INFO L93 Difference]: Finished difference Result 115 states and 389 transitions. [2021-06-05 23:27:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:27:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:27:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:16,153 INFO L225 Difference]: With dead ends: 115 [2021-06-05 23:27:16,154 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 23:27:16,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:27:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 23:27:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-06-05 23:27:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 3.4299065420560746) internal successors, (367), 107 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 367 transitions. [2021-06-05 23:27:16,167 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 367 transitions. Word has length 16 [2021-06-05 23:27:16,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:16,167 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 367 transitions. [2021-06-05 23:27:16,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,167 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 367 transitions. [2021-06-05 23:27:16,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:27:16,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:16,168 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:16,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:16,395 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:16,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:16,395 INFO L82 PathProgramCache]: Analyzing trace with hash -107519000, now seen corresponding path program 1 times [2021-06-05 23:27:16,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:16,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284531602] [2021-06-05 23:27:16,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:16,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:16,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:16,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284531602] [2021-06-05 23:27:16,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284531602] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:27:16,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:27:16,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:27:16,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86623533] [2021-06-05 23:27:16,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:27:16,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:27:16,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:16,443 INFO L87 Difference]: Start difference. First operand 108 states and 367 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:16,453 INFO L93 Difference]: Finished difference Result 57 states and 166 transitions. [2021-06-05 23:27:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:27:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:27:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:16,454 INFO L225 Difference]: With dead ends: 57 [2021-06-05 23:27:16,454 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 23:27:16,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:27:16,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 23:27:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-06-05 23:27:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 3.0377358490566038) internal successors, (161), 53 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 161 transitions. [2021-06-05 23:27:16,461 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 161 transitions. Word has length 17 [2021-06-05 23:27:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:16,461 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 161 transitions. [2021-06-05 23:27:16,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 161 transitions. [2021-06-05 23:27:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:27:16,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:16,465 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:16,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 23:27:16,465 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:16,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:16,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2041236514, now seen corresponding path program 2 times [2021-06-05 23:27:16,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:16,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265144645] [2021-06-05 23:27:16,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:16,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:16,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265144645] [2021-06-05 23:27:16,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265144645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:16,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718587606] [2021-06-05 23:27:16,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:16,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:16,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:16,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:27:16,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:16,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718587606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:16,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:16,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 23:27:16,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641548250] [2021-06-05 23:27:16,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:27:16,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:16,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:27:16,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:27:16,677 INFO L87 Difference]: Start difference. First operand 54 states and 161 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:16,715 INFO L93 Difference]: Finished difference Result 93 states and 298 transitions. [2021-06-05 23:27:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:27:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:27:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:16,717 INFO L225 Difference]: With dead ends: 93 [2021-06-05 23:27:16,717 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 23:27:16,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:27:16,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 23:27:16,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-06-05 23:27:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 283 transitions. [2021-06-05 23:27:16,725 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 283 transitions. Word has length 17 [2021-06-05 23:27:16,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:16,726 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 283 transitions. [2021-06-05 23:27:16,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:16,726 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 283 transitions. [2021-06-05 23:27:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:27:16,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:16,727 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:16,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:16,951 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1146747481, now seen corresponding path program 3 times [2021-06-05 23:27:16,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:16,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143735685] [2021-06-05 23:27:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:17,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:17,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143735685] [2021-06-05 23:27:17,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143735685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:17,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901029041] [2021-06-05 23:27:17,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:17,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:27:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:27:17,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:17,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901029041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:17,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:17,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 23:27:17,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515663206] [2021-06-05 23:27:17,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:27:17,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:27:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:17,261 INFO L87 Difference]: Start difference. First operand 87 states and 283 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:17,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:17,357 INFO L93 Difference]: Finished difference Result 144 states and 469 transitions. [2021-06-05 23:27:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:27:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:17,359 INFO L225 Difference]: With dead ends: 144 [2021-06-05 23:27:17,359 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 23:27:17,359 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:27:17,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 23:27:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-06-05 23:27:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.5238095238095237) internal successors, (370), 105 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:17,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 370 transitions. [2021-06-05 23:27:17,362 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 370 transitions. Word has length 18 [2021-06-05 23:27:17,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:17,363 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 370 transitions. [2021-06-05 23:27:17,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 370 transitions. [2021-06-05 23:27:17,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:27:17,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:17,364 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:17,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:17,588 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:17,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:17,588 INFO L82 PathProgramCache]: Analyzing trace with hash 613124629, now seen corresponding path program 4 times [2021-06-05 23:27:17,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:17,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815096406] [2021-06-05 23:27:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:17,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:17,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815096406] [2021-06-05 23:27:17,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815096406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:17,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684894777] [2021-06-05 23:27:17,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:17,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:17,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:27:17,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:17,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684894777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:17,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:17,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 23:27:17,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056177997] [2021-06-05 23:27:17,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:27:17,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:17,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:27:17,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:27:17,790 INFO L87 Difference]: Start difference. First operand 106 states and 370 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:17,844 INFO L93 Difference]: Finished difference Result 179 states and 628 transitions. [2021-06-05 23:27:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:27:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:17,846 INFO L225 Difference]: With dead ends: 179 [2021-06-05 23:27:17,846 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 23:27:17,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:27:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 23:27:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-06-05 23:27:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.7196969696969697) internal successors, (491), 132 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 491 transitions. [2021-06-05 23:27:17,851 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 491 transitions. Word has length 18 [2021-06-05 23:27:17,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:17,852 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 491 transitions. [2021-06-05 23:27:17,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 491 transitions. [2021-06-05 23:27:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:27:17,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:17,853 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 23:27:18,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 23:27:18,067 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:18,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:18,067 INFO L82 PathProgramCache]: Analyzing trace with hash 64866445, now seen corresponding path program 1 times [2021-06-05 23:27:18,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:18,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623398728] [2021-06-05 23:27:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:18,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:18,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623398728] [2021-06-05 23:27:18,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623398728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:18,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286978807] [2021-06-05 23:27:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order 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 23:27:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:27:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:18,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286978807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:18,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:18,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 23:27:18,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260205518] [2021-06-05 23:27:18,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:27:18,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:18,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:27:18,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:27:18,292 INFO L87 Difference]: Start difference. First operand 133 states and 491 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:18,369 INFO L93 Difference]: Finished difference Result 214 states and 744 transitions. [2021-06-05 23:27:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:27:18,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:27:18,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:18,371 INFO L225 Difference]: With dead ends: 214 [2021-06-05 23:27:18,371 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 23:27:18,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:27:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 23:27:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-06-05 23:27:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 3.751552795031056) internal successors, (604), 161 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 604 transitions. [2021-06-05 23:27:18,377 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 604 transitions. Word has length 18 [2021-06-05 23:27:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:18,377 INFO L482 AbstractCegarLoop]: Abstraction has 162 states and 604 transitions. [2021-06-05 23:27:18,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 604 transitions. [2021-06-05 23:27:18,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:27:18,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:18,378 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 23:27:18,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:18,587 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash 764509993, now seen corresponding path program 1 times [2021-06-05 23:27:18,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:18,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612005747] [2021-06-05 23:27:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:18,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:18,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:18,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612005747] [2021-06-05 23:27:18,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612005747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:18,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115124882] [2021-06-05 23:27:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:27:18,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:18,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 23:27:18,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115124882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:18,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:18,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 23:27:18,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020344375] [2021-06-05 23:27:18,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 23:27:18,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:18,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 23:27:18,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:27:18,844 INFO L87 Difference]: Start difference. First operand 162 states and 604 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:18,867 INFO L93 Difference]: Finished difference Result 134 states and 469 transitions. [2021-06-05 23:27:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:27:18,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:27:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:18,868 INFO L225 Difference]: With dead ends: 134 [2021-06-05 23:27:18,869 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 23:27:18,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 23:27:18,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 23:27:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-06-05 23:27:18,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 3.624) internal successors, (453), 125 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 453 transitions. [2021-06-05 23:27:18,892 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 453 transitions. Word has length 18 [2021-06-05 23:27:18,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:18,892 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 453 transitions. [2021-06-05 23:27:18,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 453 transitions. [2021-06-05 23:27:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:27:18,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:18,893 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:19,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:19,108 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 806923496, now seen corresponding path program 2 times [2021-06-05 23:27:19,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:19,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240454780] [2021-06-05 23:27:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:19,188 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 23:27:19,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:19,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240454780] [2021-06-05 23:27:19,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240454780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:19,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981370159] [2021-06-05 23:27:19,189 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 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 23:27:19,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:19,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:19,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:27:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:19,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:19,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:19,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:19,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:19,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:19,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:19,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 23:27:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:19,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981370159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:19,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:19,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 23:27:19,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415909624] [2021-06-05 23:27:19,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:27:19,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:27:19,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:27:19,544 INFO L87 Difference]: Start difference. First operand 126 states and 453 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:19,717 INFO L93 Difference]: Finished difference Result 144 states and 499 transitions. [2021-06-05 23:27:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:27:19,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:27:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:19,719 INFO L225 Difference]: With dead ends: 144 [2021-06-05 23:27:19,719 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 23:27:19,719 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 23:27:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-06-05 23:27:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 3.5757575757575757) internal successors, (472), 132 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 472 transitions. [2021-06-05 23:27:19,723 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 472 transitions. Word has length 19 [2021-06-05 23:27:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:19,723 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 472 transitions. [2021-06-05 23:27:19,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 472 transitions. [2021-06-05 23:27:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:27:19,724 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:19,724 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:19,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:27:19,947 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1447544248, now seen corresponding path program 2 times [2021-06-05 23:27:19,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:19,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147902172] [2021-06-05 23:27:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:20,003 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 23:27:20,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147902172] [2021-06-05 23:27:20,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147902172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:20,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662536570] [2021-06-05 23:27:20,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:20,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:20,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:20,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:27:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:20,299 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 23:27:20,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662536570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:20,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:20,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 23:27:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576877393] [2021-06-05 23:27:20,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:27:20,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:27:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:27:20,300 INFO L87 Difference]: Start difference. First operand 133 states and 472 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:20,415 INFO L93 Difference]: Finished difference Result 261 states and 960 transitions. [2021-06-05 23:27:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:27:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:27:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:20,417 INFO L225 Difference]: With dead ends: 261 [2021-06-05 23:27:20,417 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 23:27:20,418 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 23:27:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 169. [2021-06-05 23:27:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.9404761904761907) internal successors, (662), 168 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 662 transitions. [2021-06-05 23:27:20,426 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 662 transitions. Word has length 19 [2021-06-05 23:27:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:20,426 INFO L482 AbstractCegarLoop]: Abstraction has 169 states and 662 transitions. [2021-06-05 23:27:20,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 662 transitions. [2021-06-05 23:27:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:20,427 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:20,427 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:20,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 23:27:20,628 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash 820488117, now seen corresponding path program 5 times [2021-06-05 23:27:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:20,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615109188] [2021-06-05 23:27:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:20,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:20,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615109188] [2021-06-05 23:27:20,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615109188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:20,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370616639] [2021-06-05 23:27:20,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:20,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:27:20,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:20,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:27:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:20,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:20,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:20,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:20,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:20,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:20,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:20,958 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 23:27:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:21,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370616639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:21,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:21,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 23:27:21,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879996845] [2021-06-05 23:27:21,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:21,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:21,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:21,070 INFO L87 Difference]: Start difference. First operand 169 states and 662 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:21,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:21,252 INFO L93 Difference]: Finished difference Result 287 states and 1060 transitions. [2021-06-05 23:27:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:27:21,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:21,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:21,254 INFO L225 Difference]: With dead ends: 287 [2021-06-05 23:27:21,254 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 23:27:21,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 23:27:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 189. [2021-06-05 23:27:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 4.0) internal successors, (752), 188 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 752 transitions. [2021-06-05 23:27:21,262 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 752 transitions. Word has length 20 [2021-06-05 23:27:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:21,262 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 752 transitions. [2021-06-05 23:27:21,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 752 transitions. [2021-06-05 23:27:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:21,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:21,263 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:21,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:21,485 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:21,485 INFO L82 PathProgramCache]: Analyzing trace with hash 924426037, now seen corresponding path program 6 times [2021-06-05 23:27:21,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:21,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518338364] [2021-06-05 23:27:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:21,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:21,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518338364] [2021-06-05 23:27:21,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518338364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:21,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484253532] [2021-06-05 23:27:21,571 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 23:27:21,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:27:21,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:21,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:27:21,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:21,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484253532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:21,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:21,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 23:27:21,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677066433] [2021-06-05 23:27:21,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:21,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:21,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:21,758 INFO L87 Difference]: Start difference. First operand 189 states and 752 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:21,841 INFO L93 Difference]: Finished difference Result 211 states and 810 transitions. [2021-06-05 23:27:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:21,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:21,843 INFO L225 Difference]: With dead ends: 211 [2021-06-05 23:27:21,843 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 23:27:21,843 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 23:27:21,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2021-06-05 23:27:21,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 3.968421052631579) internal successors, (754), 190 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:21,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 754 transitions. [2021-06-05 23:27:21,850 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 754 transitions. Word has length 20 [2021-06-05 23:27:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:21,850 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 754 transitions. [2021-06-05 23:27:21,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 754 transitions. [2021-06-05 23:27:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:21,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:21,851 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:22,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 23:27:22,065 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1959111699, now seen corresponding path program 3 times [2021-06-05 23:27:22,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:22,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288317073] [2021-06-05 23:27:22,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:22,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:22,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288317073] [2021-06-05 23:27:22,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288317073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:22,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862154541] [2021-06-05 23:27:22,231 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 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 23:27:22,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:27:22,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:22,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:27:22,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:22,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:22,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:22,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:22,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:22,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:22,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:22,426 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 23:27:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:22,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862154541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:22,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:22,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 23:27:22,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676661235] [2021-06-05 23:27:22,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:27:22,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:22,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:27:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:27:22,542 INFO L87 Difference]: Start difference. First operand 191 states and 754 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:22,671 INFO L93 Difference]: Finished difference Result 509 states and 2067 transitions. [2021-06-05 23:27:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:27:22,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:22,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:22,675 INFO L225 Difference]: With dead ends: 509 [2021-06-05 23:27:22,675 INFO L226 Difference]: Without dead ends: 504 [2021-06-05 23:27:22,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:22,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2021-06-05 23:27:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 259. [2021-06-05 23:27:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 4.37984496124031) internal successors, (1130), 258 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 1130 transitions. [2021-06-05 23:27:22,686 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 1130 transitions. Word has length 20 [2021-06-05 23:27:22,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:22,686 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 1130 transitions. [2021-06-05 23:27:22,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:22,686 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 1130 transitions. [2021-06-05 23:27:22,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:22,687 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:22,687 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:22,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 23:27:22,901 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash -626942165, now seen corresponding path program 3 times [2021-06-05 23:27:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:22,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187235355] [2021-06-05 23:27:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:22,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:22,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187235355] [2021-06-05 23:27:22,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187235355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:22,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406909296] [2021-06-05 23:27:22,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:23,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:27:23,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:23,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:27:23,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:23,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406909296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:23,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:23,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 23:27:23,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048549649] [2021-06-05 23:27:23,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:23,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:23,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:23,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:23,256 INFO L87 Difference]: Start difference. First operand 259 states and 1130 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:23,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:23,389 INFO L93 Difference]: Finished difference Result 494 states and 2044 transitions. [2021-06-05 23:27:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:27:23,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:23,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:23,393 INFO L225 Difference]: With dead ends: 494 [2021-06-05 23:27:23,393 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 23:27:23,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 23:27:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 286. [2021-06-05 23:27:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 4.494736842105263) internal successors, (1281), 285 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 1281 transitions. [2021-06-05 23:27:23,403 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 1281 transitions. Word has length 20 [2021-06-05 23:27:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:23,403 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 1281 transitions. [2021-06-05 23:27:23,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 1281 transitions. [2021-06-05 23:27:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:27:23,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:23,404 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:23,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 23:27:23,628 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -760999699, now seen corresponding path program 4 times [2021-06-05 23:27:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:23,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37477619] [2021-06-05 23:27:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:23,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:23,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37477619] [2021-06-05 23:27:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37477619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:23,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132130475] [2021-06-05 23:27:23,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:23,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:23,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:23,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:27:23,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:23,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132130475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:23,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:23,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 23:27:23,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883961091] [2021-06-05 23:27:23,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:27:23,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:23,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:27:23,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:27:23,875 INFO L87 Difference]: Start difference. First operand 286 states and 1281 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:23,959 INFO L93 Difference]: Finished difference Result 345 states and 1496 transitions. [2021-06-05 23:27:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:27:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 23:27:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:23,962 INFO L225 Difference]: With dead ends: 345 [2021-06-05 23:27:23,962 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 23:27:23,964 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 23:27:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 294. [2021-06-05 23:27:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 4.505119453924915) internal successors, (1320), 293 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 1320 transitions. [2021-06-05 23:27:23,974 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 1320 transitions. Word has length 20 [2021-06-05 23:27:23,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:23,974 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 1320 transitions. [2021-06-05 23:27:23,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 1320 transitions. [2021-06-05 23:27:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:23,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:23,977 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:24,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:24,201 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1175269464, now seen corresponding path program 7 times [2021-06-05 23:27:24,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:24,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252250436] [2021-06-05 23:27:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:24,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:24,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252250436] [2021-06-05 23:27:24,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252250436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:24,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809312812] [2021-06-05 23:27:24,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:24,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:27:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:24,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:24,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:24,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:24,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:24,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:24,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:24,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:24,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:24,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:24,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:24,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:24,561 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:85, output treesize:57 [2021-06-05 23:27:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809312812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:24,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:24,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 23:27:24,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785399816] [2021-06-05 23:27:24,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:24,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:24,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:24,643 INFO L87 Difference]: Start difference. First operand 294 states and 1320 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:24,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:24,838 INFO L93 Difference]: Finished difference Result 411 states and 1659 transitions. [2021-06-05 23:27:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:27:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:24,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:24,841 INFO L225 Difference]: With dead ends: 411 [2021-06-05 23:27:24,841 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 23:27:24,842 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 336.7ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 23:27:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 322. [2021-06-05 23:27:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 4.336448598130841) internal successors, (1392), 321 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:24,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1392 transitions. [2021-06-05 23:27:24,851 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1392 transitions. Word has length 21 [2021-06-05 23:27:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:24,851 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1392 transitions. [2021-06-05 23:27:24,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:24,852 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1392 transitions. [2021-06-05 23:27:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:24,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:24,853 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:25,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:27:25,069 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:25,069 INFO L82 PathProgramCache]: Analyzing trace with hash -105496252, now seen corresponding path program 4 times [2021-06-05 23:27:25,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:25,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648576425] [2021-06-05 23:27:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:25,179 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 23:27:25,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648576425] [2021-06-05 23:27:25,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648576425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:25,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348563654] [2021-06-05 23:27:25,180 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 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 23:27:25,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:27:25,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:25,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:25,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:25,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:25,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:25,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:25,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:25,359 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:57 [2021-06-05 23:27:25,508 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 23:27:25,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348563654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:25,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:25,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:27:25,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845398171] [2021-06-05 23:27:25,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:25,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:25,510 INFO L87 Difference]: Start difference. First operand 322 states and 1392 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:25,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:25,853 INFO L93 Difference]: Finished difference Result 868 states and 3551 transitions. [2021-06-05 23:27:25,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:25,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:25,859 INFO L225 Difference]: With dead ends: 868 [2021-06-05 23:27:25,860 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 23:27:25,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 365.5ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 23:27:25,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 415. [2021-06-05 23:27:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.545893719806763) internal successors, (1882), 414 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1882 transitions. [2021-06-05 23:27:25,877 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1882 transitions. Word has length 21 [2021-06-05 23:27:25,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:25,877 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1882 transitions. [2021-06-05 23:27:25,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1882 transitions. [2021-06-05 23:27:25,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:25,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:25,879 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:26,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 23:27:26,093 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1429441592, now seen corresponding path program 5 times [2021-06-05 23:27:26,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:26,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869263007] [2021-06-05 23:27:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:26,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:26,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869263007] [2021-06-05 23:27:26,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869263007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:26,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804918514] [2021-06-05 23:27:26,201 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 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 23:27:26,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:27:26,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:27:26,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804918514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:26,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:26,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 23:27:26,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884210701] [2021-06-05 23:27:26,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:27:26,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:26,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:27:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:26,426 INFO L87 Difference]: Start difference. First operand 415 states and 1882 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:26,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:26,495 INFO L93 Difference]: Finished difference Result 431 states and 1910 transitions. [2021-06-05 23:27:26,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:27:26,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:26,498 INFO L225 Difference]: With dead ends: 431 [2021-06-05 23:27:26,498 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 23:27:26,498 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 23:27:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 415. [2021-06-05 23:27:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 4.531400966183575) internal successors, (1876), 414 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1876 transitions. [2021-06-05 23:27:26,510 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1876 transitions. Word has length 21 [2021-06-05 23:27:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:26,510 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1876 transitions. [2021-06-05 23:27:26,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1876 transitions. [2021-06-05 23:27:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:26,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:26,511 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:26,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:26,735 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:26,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:26,735 INFO L82 PathProgramCache]: Analyzing trace with hash -958081368, now seen corresponding path program 5 times [2021-06-05 23:27:26,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:26,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170874715] [2021-06-05 23:27:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:26,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:26,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170874715] [2021-06-05 23:27:26,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170874715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:26,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739020227] [2021-06-05 23:27:26,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:26,869 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:27:26,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:26,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:27:26,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:27,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739020227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:27,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:27,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 23:27:27,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222239608] [2021-06-05 23:27:27,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:27:27,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:27:27,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:27,146 INFO L87 Difference]: Start difference. First operand 415 states and 1876 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:27,317 INFO L93 Difference]: Finished difference Result 1022 states and 4384 transitions. [2021-06-05 23:27:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:27,324 INFO L225 Difference]: With dead ends: 1022 [2021-06-05 23:27:27,324 INFO L226 Difference]: Without dead ends: 1006 [2021-06-05 23:27:27,324 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:27,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-06-05 23:27:27,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 655. [2021-06-05 23:27:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 654 states have (on average 4.792048929663609) internal successors, (3134), 654 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 3134 transitions. [2021-06-05 23:27:27,346 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 3134 transitions. Word has length 21 [2021-06-05 23:27:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:27,346 INFO L482 AbstractCegarLoop]: Abstraction has 655 states and 3134 transitions. [2021-06-05 23:27:27,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:27,346 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 3134 transitions. [2021-06-05 23:27:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:27,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:27,348 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:27,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 23:27:27,572 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:27,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:27,572 INFO L82 PathProgramCache]: Analyzing trace with hash -536313780, now seen corresponding path program 6 times [2021-06-05 23:27:27,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:27,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201658550] [2021-06-05 23:27:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:27,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:27,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201658550] [2021-06-05 23:27:27,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201658550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:27,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775354700] [2021-06-05 23:27:27,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:27,759 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:27:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:27,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:27:27,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:27,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775354700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:27,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:27,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 23:27:27,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682804224] [2021-06-05 23:27:27,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:27:27,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:27,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:27:27,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:27,934 INFO L87 Difference]: Start difference. First operand 655 states and 3134 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:28,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:28,050 INFO L93 Difference]: Finished difference Result 715 states and 3326 transitions. [2021-06-05 23:27:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:27:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:28,055 INFO L225 Difference]: With dead ends: 715 [2021-06-05 23:27:28,055 INFO L226 Difference]: Without dead ends: 713 [2021-06-05 23:27:28,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:28,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-06-05 23:27:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 663. [2021-06-05 23:27:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-06-05 23:27:28,075 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-06-05 23:27:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:28,075 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-06-05 23:27:28,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-06-05 23:27:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:28,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:28,077 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:28,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 23:27:28,293 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -818897626, now seen corresponding path program 7 times [2021-06-05 23:27:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:28,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115364097] [2021-06-05 23:27:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:28,378 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 23:27:28,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115364097] [2021-06-05 23:27:28,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115364097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:28,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903770645] [2021-06-05 23:27:28,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:28,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:27:28,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:28,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:28,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:28,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:28,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:28,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:22 [2021-06-05 23:27:28,603 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 23:27:28,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903770645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:28,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:28,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 23:27:28,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846344361] [2021-06-05 23:27:28,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:27:28,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:27:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:28,604 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:28,737 INFO L93 Difference]: Finished difference Result 745 states and 3433 transitions. [2021-06-05 23:27:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:27:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:28,742 INFO L225 Difference]: With dead ends: 745 [2021-06-05 23:27:28,742 INFO L226 Difference]: Without dead ends: 740 [2021-06-05 23:27:28,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:28,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-06-05 23:27:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 663. [2021-06-05 23:27:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 4.7734138972809665) internal successors, (3160), 662 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 3160 transitions. [2021-06-05 23:27:28,761 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 3160 transitions. Word has length 21 [2021-06-05 23:27:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:28,761 INFO L482 AbstractCegarLoop]: Abstraction has 663 states and 3160 transitions. [2021-06-05 23:27:28,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:28,762 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 3160 transitions. [2021-06-05 23:27:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:28,764 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:28,764 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:28,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 23:27:28,988 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -979212920, now seen corresponding path program 8 times [2021-06-05 23:27:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:28,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315303987] [2021-06-05 23:27:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:29,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:29,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315303987] [2021-06-05 23:27:29,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315303987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:29,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425568116] [2021-06-05 23:27:29,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:29,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:27:29,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:29,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425568116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:29,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:29,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 23:27:29,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823183762] [2021-06-05 23:27:29,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:27:29,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:27:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:29,381 INFO L87 Difference]: Start difference. First operand 663 states and 3160 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:29,609 INFO L93 Difference]: Finished difference Result 706 states and 3296 transitions. [2021-06-05 23:27:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:27:29,609 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:29,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:29,614 INFO L225 Difference]: With dead ends: 706 [2021-06-05 23:27:29,614 INFO L226 Difference]: Without dead ends: 704 [2021-06-05 23:27:29,614 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:27:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-05 23:27:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 666. [2021-06-05 23:27:29,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 4.774436090225564) internal successors, (3175), 665 states have internal predecessors, (3175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 3175 transitions. [2021-06-05 23:27:29,633 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 3175 transitions. Word has length 21 [2021-06-05 23:27:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:29,633 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 3175 transitions. [2021-06-05 23:27:29,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 3175 transitions. [2021-06-05 23:27:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:29,635 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:29,635 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:29,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 23:27:29,858 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -278148342, now seen corresponding path program 9 times [2021-06-05 23:27:29,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:29,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194638566] [2021-06-05 23:27:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:29,969 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 23:27:29,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:29,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194638566] [2021-06-05 23:27:29,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194638566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:29,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521479706] [2021-06-05 23:27:29,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:30,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:27:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:27:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:30,178 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 23:27:30,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521479706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:30,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:30,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 23:27:30,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064996657] [2021-06-05 23:27:30,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:27:30,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:27:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:30,179 INFO L87 Difference]: Start difference. First operand 666 states and 3175 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:30,440 INFO L93 Difference]: Finished difference Result 1302 states and 5669 transitions. [2021-06-05 23:27:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:27:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:30,449 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 23:27:30,449 INFO L226 Difference]: Without dead ends: 1272 [2021-06-05 23:27:30,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:27:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-06-05 23:27:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 737. [2021-06-05 23:27:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 4.794836956521739) internal successors, (3529), 736 states have internal predecessors, (3529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 3529 transitions. [2021-06-05 23:27:30,475 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 3529 transitions. Word has length 21 [2021-06-05 23:27:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:30,475 INFO L482 AbstractCegarLoop]: Abstraction has 737 states and 3529 transitions. [2021-06-05 23:27:30,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:30,475 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 3529 transitions. [2021-06-05 23:27:30,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:30,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:30,478 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:30,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:30,693 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:30,693 INFO L82 PathProgramCache]: Analyzing trace with hash -781165444, now seen corresponding path program 1 times [2021-06-05 23:27:30,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:30,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397368326] [2021-06-05 23:27:30,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:30,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:30,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397368326] [2021-06-05 23:27:30,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397368326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:30,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088693033] [2021-06-05 23:27:30,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:27:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:31,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088693033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:31,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:31,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 23:27:31,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985262274] [2021-06-05 23:27:31,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:27:31,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:27:31,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:27:31,153 INFO L87 Difference]: Start difference. First operand 737 states and 3529 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:31,486 INFO L93 Difference]: Finished difference Result 910 states and 3945 transitions. [2021-06-05 23:27:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:31,487 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 23:27:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:31,496 INFO L225 Difference]: With dead ends: 910 [2021-06-05 23:27:31,496 INFO L226 Difference]: Without dead ends: 881 [2021-06-05 23:27:31,496 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:31,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-06-05 23:27:31,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 599. [2021-06-05 23:27:31,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 4.806020066889632) internal successors, (2874), 598 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 2874 transitions. [2021-06-05 23:27:31,518 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 2874 transitions. Word has length 21 [2021-06-05 23:27:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:31,518 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 2874 transitions. [2021-06-05 23:27:31,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:31,518 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 2874 transitions. [2021-06-05 23:27:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:31,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:31,520 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:31,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 23:27:31,737 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash -488176887, now seen corresponding path program 6 times [2021-06-05 23:27:31,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:31,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589520017] [2021-06-05 23:27:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:31,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:31,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:31,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589520017] [2021-06-05 23:27:31,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589520017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:31,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130130296] [2021-06-05 23:27:31,874 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 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 23:27:31,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:27:31,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:27:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:32,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130130296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:32,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:32,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:27:32,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85427217] [2021-06-05 23:27:32,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:27:32,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:27:32,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:32,144 INFO L87 Difference]: Start difference. First operand 599 states and 2874 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:32,342 INFO L93 Difference]: Finished difference Result 792 states and 3525 transitions. [2021-06-05 23:27:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:27:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:32,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:32,347 INFO L225 Difference]: With dead ends: 792 [2021-06-05 23:27:32,348 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 23:27:32,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 23:27:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 605. [2021-06-05 23:27:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 4.821192052980132) internal successors, (2912), 604 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 2912 transitions. [2021-06-05 23:27:32,364 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 2912 transitions. Word has length 22 [2021-06-05 23:27:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:32,365 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 2912 transitions. [2021-06-05 23:27:32,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 2912 transitions. [2021-06-05 23:27:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:32,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:32,367 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:32,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:32,581 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:32,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1712214825, now seen corresponding path program 10 times [2021-06-05 23:27:32,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:32,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565003233] [2021-06-05 23:27:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:32,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:32,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565003233] [2021-06-05 23:27:32,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565003233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:32,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280758267] [2021-06-05 23:27:32,689 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 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 23:27:32,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:32,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:27:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:32,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:32,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:32,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:32,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:32,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:32,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:32,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:75, output treesize:61 [2021-06-05 23:27:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:33,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280758267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:33,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:33,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 23:27:33,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840200606] [2021-06-05 23:27:33,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:27:33,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:27:33,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:33,048 INFO L87 Difference]: Start difference. First operand 605 states and 2912 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:33,287 INFO L93 Difference]: Finished difference Result 1203 states and 5352 transitions. [2021-06-05 23:27:33,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:33,288 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:33,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:33,295 INFO L225 Difference]: With dead ends: 1203 [2021-06-05 23:27:33,296 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 23:27:33,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:33,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 23:27:33,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 781. [2021-06-05 23:27:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 4.96025641025641) internal successors, (3869), 780 states have internal predecessors, (3869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 3869 transitions. [2021-06-05 23:27:33,321 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 3869 transitions. Word has length 22 [2021-06-05 23:27:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:33,321 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 3869 transitions. [2021-06-05 23:27:33,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 3869 transitions. [2021-06-05 23:27:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:33,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:33,324 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:33,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 23:27:33,537 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1902819445, now seen corresponding path program 11 times [2021-06-05 23:27:33,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:33,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639759385] [2021-06-05 23:27:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:33,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639759385] [2021-06-05 23:27:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639759385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:33,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712398492] [2021-06-05 23:27:33,705 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 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 23:27:33,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:27:33,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:33,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:27:33,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:34,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712398492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:34,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:34,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:27:34,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941584792] [2021-06-05 23:27:34,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:27:34,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:34,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:27:34,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:34,093 INFO L87 Difference]: Start difference. First operand 781 states and 3869 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:34,499 INFO L93 Difference]: Finished difference Result 869 states and 4146 transitions. [2021-06-05 23:27:34,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:34,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:34,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:34,502 INFO L225 Difference]: With dead ends: 869 [2021-06-05 23:27:34,503 INFO L226 Difference]: Without dead ends: 864 [2021-06-05 23:27:34,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:27:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-06-05 23:27:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 789. [2021-06-05 23:27:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 4.963197969543147) internal successors, (3911), 788 states have internal predecessors, (3911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 3911 transitions. [2021-06-05 23:27:34,528 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 3911 transitions. Word has length 22 [2021-06-05 23:27:34,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:34,528 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 3911 transitions. [2021-06-05 23:27:34,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:34,529 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 3911 transitions. [2021-06-05 23:27:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:34,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:34,531 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:34,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 23:27:34,754 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:34,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:34,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1681233933, now seen corresponding path program 12 times [2021-06-05 23:27:34,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:34,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923795819] [2021-06-05 23:27:34,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:34,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:34,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923795819] [2021-06-05 23:27:34,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923795819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:34,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108069128] [2021-06-05 23:27:34,896 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 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 23:27:34,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:27:34,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:34,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:27:34,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:35,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:35,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:35,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:35,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:35,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-06-05 23:27:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:35,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108069128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:35,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:35,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 23:27:35,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737051730] [2021-06-05 23:27:35,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:35,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:35,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:35,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:35,185 INFO L87 Difference]: Start difference. First operand 789 states and 3911 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:35,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:35,448 INFO L93 Difference]: Finished difference Result 1170 states and 5326 transitions. [2021-06-05 23:27:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:27:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:35,452 INFO L225 Difference]: With dead ends: 1170 [2021-06-05 23:27:35,452 INFO L226 Difference]: Without dead ends: 1162 [2021-06-05 23:27:35,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-06-05 23:27:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 809. [2021-06-05 23:27:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.951732673267327) internal successors, (4001), 808 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 4001 transitions. [2021-06-05 23:27:35,490 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 4001 transitions. Word has length 22 [2021-06-05 23:27:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:35,490 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 4001 transitions. [2021-06-05 23:27:35,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:35,490 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 4001 transitions. [2021-06-05 23:27:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:35,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:35,493 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:35,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 23:27:35,715 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:35,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:35,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1253616623, now seen corresponding path program 13 times [2021-06-05 23:27:35,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:35,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167561465] [2021-06-05 23:27:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:35,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:35,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167561465] [2021-06-05 23:27:35,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167561465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:35,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798247861] [2021-06-05 23:27:35,861 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 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 23:27:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:35,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:27:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:36,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:36,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:36,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:36,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:36,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:36,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 23:27:36,138 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:91, output treesize:77 [2021-06-05 23:27:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:36,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798247861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:36,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:36,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-06-05 23:27:36,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109297682] [2021-06-05 23:27:36,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:36,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:36,224 INFO L87 Difference]: Start difference. First operand 809 states and 4001 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:36,340 INFO L93 Difference]: Finished difference Result 958 states and 4478 transitions. [2021-06-05 23:27:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:36,344 INFO L225 Difference]: With dead ends: 958 [2021-06-05 23:27:36,344 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 23:27:36,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:36,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 23:27:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 817. [2021-06-05 23:27:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 4.922794117647059) internal successors, (4017), 816 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 4017 transitions. [2021-06-05 23:27:36,367 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 4017 transitions. Word has length 22 [2021-06-05 23:27:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:36,367 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 4017 transitions. [2021-06-05 23:27:36,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 4017 transitions. [2021-06-05 23:27:36,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:36,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:36,370 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:36,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:36,593 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:36,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1547176399, now seen corresponding path program 14 times [2021-06-05 23:27:36,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:36,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358011234] [2021-06-05 23:27:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:36,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358011234] [2021-06-05 23:27:36,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358011234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750029304] [2021-06-05 23:27:36,738 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 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 23:27:36,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:36,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:36,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:27:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750029304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:36,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:36,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:27:36,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306016350] [2021-06-05 23:27:36,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:27:36,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:27:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:36,956 INFO L87 Difference]: Start difference. First operand 817 states and 4017 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:37,249 INFO L93 Difference]: Finished difference Result 1066 states and 4874 transitions. [2021-06-05 23:27:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:27:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:37,252 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 23:27:37,252 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 23:27:37,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:27:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 23:27:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 837. [2021-06-05 23:27:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 4.927033492822966) internal successors, (4119), 836 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:37,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 4119 transitions. [2021-06-05 23:27:37,276 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 4119 transitions. Word has length 22 [2021-06-05 23:27:37,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:37,277 INFO L482 AbstractCegarLoop]: Abstraction has 837 states and 4119 transitions. [2021-06-05 23:27:37,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 4119 transitions. [2021-06-05 23:27:37,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:37,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:37,279 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:37,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 23:27:37,500 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:37,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1104277259, now seen corresponding path program 15 times [2021-06-05 23:27:37,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:37,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667394313] [2021-06-05 23:27:37,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:37,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:37,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667394313] [2021-06-05 23:27:37,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667394313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:37,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967217981] [2021-06-05 23:27:37,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:37,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:27:37,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:37,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:27:37,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:37,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967217981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:37,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:37,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:27:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7065628] [2021-06-05 23:27:37,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:27:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:27:37,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:37,875 INFO L87 Difference]: Start difference. First operand 837 states and 4119 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:38,018 INFO L93 Difference]: Finished difference Result 896 states and 4308 transitions. [2021-06-05 23:27:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:27:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:38,021 INFO L225 Difference]: With dead ends: 896 [2021-06-05 23:27:38,021 INFO L226 Difference]: Without dead ends: 891 [2021-06-05 23:27:38,021 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 275.4ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-06-05 23:27:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 842. [2021-06-05 23:27:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 4.915576694411415) internal successors, (4134), 841 states have internal predecessors, (4134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:38,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 4134 transitions. [2021-06-05 23:27:38,041 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 4134 transitions. Word has length 22 [2021-06-05 23:27:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:38,041 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 4134 transitions. [2021-06-05 23:27:38,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 4134 transitions. [2021-06-05 23:27:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:38,044 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:38,044 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:38,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:38,268 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1885658193, now seen corresponding path program 2 times [2021-06-05 23:27:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:38,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048667271] [2021-06-05 23:27:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:38,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:38,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048667271] [2021-06-05 23:27:38,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048667271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:38,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294108957] [2021-06-05 23:27:38,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:38,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:38,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:27:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:38,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:38,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:38,921 INFO L628 ElimStorePlain]: treesize reduction 7, result has 90.1 percent of original size [2021-06-05 23:27:38,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:38,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:38,944 INFO L628 ElimStorePlain]: treesize reduction 33, result has 42.1 percent of original size [2021-06-05 23:27:38,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:38,945 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:78, output treesize:24 [2021-06-05 23:27:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:38,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294108957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:38,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:38,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:27:38,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106365383] [2021-06-05 23:27:38,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:27:38,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:38,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:27:38,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:38,979 INFO L87 Difference]: Start difference. First operand 842 states and 4134 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:39,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:39,331 INFO L93 Difference]: Finished difference Result 947 states and 4449 transitions. [2021-06-05 23:27:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:39,335 INFO L225 Difference]: With dead ends: 947 [2021-06-05 23:27:39,335 INFO L226 Difference]: Without dead ends: 930 [2021-06-05 23:27:39,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:27:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-06-05 23:27:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 847. [2021-06-05 23:27:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 4.914893617021277) internal successors, (4158), 846 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 4158 transitions. [2021-06-05 23:27:39,355 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 4158 transitions. Word has length 22 [2021-06-05 23:27:39,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:39,355 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 4158 transitions. [2021-06-05 23:27:39,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 4158 transitions. [2021-06-05 23:27:39,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:39,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:39,359 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:39,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:39,573 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash -671870473, now seen corresponding path program 3 times [2021-06-05 23:27:39,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:39,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065737685] [2021-06-05 23:27:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:39,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065737685] [2021-06-05 23:27:39,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065737685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330723087] [2021-06-05 23:27:39,664 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 23:27:39,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:27:39,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:39,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:27:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:39,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:39,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:39,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:39,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:39,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-05 23:27:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:39,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330723087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:39,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:39,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 23:27:39,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370207019] [2021-06-05 23:27:39,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:39,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:39,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:39,855 INFO L87 Difference]: Start difference. First operand 847 states and 4158 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:40,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:40,052 INFO L93 Difference]: Finished difference Result 1380 states and 6250 transitions. [2021-06-05 23:27:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:40,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:40,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:40,057 INFO L225 Difference]: With dead ends: 1380 [2021-06-05 23:27:40,057 INFO L226 Difference]: Without dead ends: 1371 [2021-06-05 23:27:40,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-06-05 23:27:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 902. [2021-06-05 23:27:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 4.988901220865705) internal successors, (4495), 901 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 4495 transitions. [2021-06-05 23:27:40,083 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 4495 transitions. Word has length 22 [2021-06-05 23:27:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:40,083 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 4495 transitions. [2021-06-05 23:27:40,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 4495 transitions. [2021-06-05 23:27:40,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:40,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:40,085 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:40,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 23:27:40,300 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash 965997621, now seen corresponding path program 4 times [2021-06-05 23:27:40,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:40,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363792922] [2021-06-05 23:27:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:40,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:40,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363792922] [2021-06-05 23:27:40,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363792922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:40,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178191081] [2021-06-05 23:27:40,391 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 23:27:40,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:40,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:40,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:27:40,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:40,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178191081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:40,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:40,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 23:27:40,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725240903] [2021-06-05 23:27:40,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:40,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:40,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:40,770 INFO L87 Difference]: Start difference. First operand 902 states and 4495 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:41,069 INFO L93 Difference]: Finished difference Result 929 states and 4570 transitions. [2021-06-05 23:27:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:27:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:41,073 INFO L225 Difference]: With dead ends: 929 [2021-06-05 23:27:41,073 INFO L226 Difference]: Without dead ends: 927 [2021-06-05 23:27:41,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 553.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:27:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-06-05 23:27:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 909. [2021-06-05 23:27:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.973568281938326) internal successors, (4516), 908 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 4516 transitions. [2021-06-05 23:27:41,095 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 4516 transitions. Word has length 22 [2021-06-05 23:27:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:41,095 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 4516 transitions. [2021-06-05 23:27:41,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 4516 transitions. [2021-06-05 23:27:41,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:41,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:41,098 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:41,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:41,321 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1818617425, now seen corresponding path program 5 times [2021-06-05 23:27:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:41,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325351451] [2021-06-05 23:27:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325351451] [2021-06-05 23:27:41,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325351451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351008084] [2021-06-05 23:27:41,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:41,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:27:41,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:41,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:27:41,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351008084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:41,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:41,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 23:27:41,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713430157] [2021-06-05 23:27:42,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:27:42,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:42,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:27:42,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:27:42,000 INFO L87 Difference]: Start difference. First operand 909 states and 4516 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:42,364 INFO L93 Difference]: Finished difference Result 936 states and 4581 transitions. [2021-06-05 23:27:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:42,368 INFO L225 Difference]: With dead ends: 936 [2021-06-05 23:27:42,368 INFO L226 Difference]: Without dead ends: 934 [2021-06-05 23:27:42,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 737.2ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:27:42,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-06-05 23:27:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 907. [2021-06-05 23:27:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.970198675496689) internal successors, (4503), 906 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 4503 transitions. [2021-06-05 23:27:42,390 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 4503 transitions. Word has length 22 [2021-06-05 23:27:42,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:42,390 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 4503 transitions. [2021-06-05 23:27:42,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 4503 transitions. [2021-06-05 23:27:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:42,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:42,393 INFO L554 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:42,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 23:27:42,609 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash 541686385, now seen corresponding path program 6 times [2021-06-05 23:27:42,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:42,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336080850] [2021-06-05 23:27:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:42,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:42,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336080850] [2021-06-05 23:27:42,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336080850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:42,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629676860] [2021-06-05 23:27:42,719 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 23:27:42,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:27:42,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:27:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:43,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629676860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:43,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:43,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 23:27:43,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879723931] [2021-06-05 23:27:43,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:43,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:43,220 INFO L87 Difference]: Start difference. First operand 907 states and 4503 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:43,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:43,445 INFO L93 Difference]: Finished difference Result 929 states and 4558 transitions. [2021-06-05 23:27:43,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:27:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:43,447 INFO L225 Difference]: With dead ends: 929 [2021-06-05 23:27:43,447 INFO L226 Difference]: Without dead ends: 928 [2021-06-05 23:27:43,447 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-06-05 23:27:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 908. [2021-06-05 23:27:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 4.965821389195149) internal successors, (4504), 907 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:43,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 4504 transitions. [2021-06-05 23:27:43,468 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 4504 transitions. Word has length 22 [2021-06-05 23:27:43,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:43,469 INFO L482 AbstractCegarLoop]: Abstraction has 908 states and 4504 transitions. [2021-06-05 23:27:43,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:43,469 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 4504 transitions. [2021-06-05 23:27:43,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:43,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:43,471 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:43,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:43,685 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1519096036, now seen corresponding path program 7 times [2021-06-05 23:27:43,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:43,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326925306] [2021-06-05 23:27:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:43,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:43,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326925306] [2021-06-05 23:27:43,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326925306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:43,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074630186] [2021-06-05 23:27:43,800 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 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 23:27:43,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:27:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:44,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074630186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:44,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:44,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:27:44,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053568383] [2021-06-05 23:27:44,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:27:44,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:44,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:27:44,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:44,185 INFO L87 Difference]: Start difference. First operand 908 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:44,388 INFO L93 Difference]: Finished difference Result 952 states and 4606 transitions. [2021-06-05 23:27:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:44,388 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:44,390 INFO L225 Difference]: With dead ends: 952 [2021-06-05 23:27:44,390 INFO L226 Difference]: Without dead ends: 950 [2021-06-05 23:27:44,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2021-06-05 23:27:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 906. [2021-06-05 23:27:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 4.942541436464088) internal successors, (4473), 905 states have internal predecessors, (4473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 4473 transitions. [2021-06-05 23:27:44,415 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 4473 transitions. Word has length 23 [2021-06-05 23:27:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:44,415 INFO L482 AbstractCegarLoop]: Abstraction has 906 states and 4473 transitions. [2021-06-05 23:27:44,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 4473 transitions. [2021-06-05 23:27:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:44,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:44,417 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:44,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 23:27:44,637 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1855571384, now seen corresponding path program 16 times [2021-06-05 23:27:44,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:44,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449106179] [2021-06-05 23:27:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:44,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:44,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449106179] [2021-06-05 23:27:44,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449106179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:44,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024000825] [2021-06-05 23:27:44,775 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 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 23:27:44,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:44,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:44,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:27:44,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:45,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:45,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:45,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:45,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:45,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:45,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:45,092 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 23:27:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:45,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024000825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:45,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:45,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 23:27:45,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920648227] [2021-06-05 23:27:45,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:45,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:45,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:45,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:45,195 INFO L87 Difference]: Start difference. First operand 906 states and 4473 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:45,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:45,269 INFO L93 Difference]: Finished difference Result 1075 states and 4663 transitions. [2021-06-05 23:27:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:45,272 INFO L225 Difference]: With dead ends: 1075 [2021-06-05 23:27:45,272 INFO L226 Difference]: Without dead ends: 1071 [2021-06-05 23:27:45,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-06-05 23:27:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 772. [2021-06-05 23:27:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 4.752269779507134) internal successors, (3664), 771 states have internal predecessors, (3664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 3664 transitions. [2021-06-05 23:27:45,290 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 3664 transitions. Word has length 23 [2021-06-05 23:27:45,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:45,290 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 3664 transitions. [2021-06-05 23:27:45,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:45,290 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 3664 transitions. [2021-06-05 23:27:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:45,292 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:45,292 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:45,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:45,505 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2015886678, now seen corresponding path program 17 times [2021-06-05 23:27:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:45,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096766002] [2021-06-05 23:27:45,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:45,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:45,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096766002] [2021-06-05 23:27:45,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096766002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:45,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264318491] [2021-06-05 23:27:45,604 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 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 23:27:45,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:27:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:45,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:27:45,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264318491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:45,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:45,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:27:45,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722047636] [2021-06-05 23:27:45,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:27:45,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:45,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:27:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:45,908 INFO L87 Difference]: Start difference. First operand 772 states and 3664 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:46,027 INFO L93 Difference]: Finished difference Result 833 states and 3832 transitions. [2021-06-05 23:27:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:46,029 INFO L225 Difference]: With dead ends: 833 [2021-06-05 23:27:46,029 INFO L226 Difference]: Without dead ends: 827 [2021-06-05 23:27:46,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:46,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-06-05 23:27:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 774. [2021-06-05 23:27:46,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.745148771021992) internal successors, (3668), 773 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:46,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3668 transitions. [2021-06-05 23:27:46,046 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3668 transitions. Word has length 23 [2021-06-05 23:27:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:46,046 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3668 transitions. [2021-06-05 23:27:46,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3668 transitions. [2021-06-05 23:27:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:46,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:46,048 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:46,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:46,265 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1854769382, now seen corresponding path program 18 times [2021-06-05 23:27:46,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:46,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602288944] [2021-06-05 23:27:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:46,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:46,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602288944] [2021-06-05 23:27:46,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602288944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:46,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595441588] [2021-06-05 23:27:46,387 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 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 23:27:46,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:27:46,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:46,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:27:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:46,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595441588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:46,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:46,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:27:46,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836147598] [2021-06-05 23:27:46,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:27:46,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:46,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:27:46,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:46,823 INFO L87 Difference]: Start difference. First operand 774 states and 3668 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:46,970 INFO L93 Difference]: Finished difference Result 830 states and 3817 transitions. [2021-06-05 23:27:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:46,974 INFO L225 Difference]: With dead ends: 830 [2021-06-05 23:27:46,974 INFO L226 Difference]: Without dead ends: 828 [2021-06-05 23:27:46,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:46,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-05 23:27:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 776. [2021-06-05 23:27:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 4.736774193548387) internal successors, (3671), 775 states have internal predecessors, (3671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 3671 transitions. [2021-06-05 23:27:46,995 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 3671 transitions. Word has length 23 [2021-06-05 23:27:46,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:46,997 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 3671 transitions. [2021-06-05 23:27:46,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:46,997 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 3671 transitions. [2021-06-05 23:27:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:47,000 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:47,000 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:47,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:47,217 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1208762112, now seen corresponding path program 19 times [2021-06-05 23:27:47,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:47,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745099456] [2021-06-05 23:27:47,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:27:47,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:47,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745099456] [2021-06-05 23:27:47,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745099456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:47,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154697328] [2021-06-05 23:27:47,373 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 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 23:27:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:47,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:27:47,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:47,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154697328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:47,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:47,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 23:27:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565223677] [2021-06-05 23:27:47,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:27:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:27:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:27:47,726 INFO L87 Difference]: Start difference. First operand 776 states and 3671 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:47,935 INFO L93 Difference]: Finished difference Result 941 states and 4147 transitions. [2021-06-05 23:27:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:47,938 INFO L225 Difference]: With dead ends: 941 [2021-06-05 23:27:47,938 INFO L226 Difference]: Without dead ends: 923 [2021-06-05 23:27:47,938 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:47,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-06-05 23:27:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 773. [2021-06-05 23:27:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 4.699481865284974) internal successors, (3628), 772 states have internal predecessors, (3628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:47,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 3628 transitions. [2021-06-05 23:27:47,956 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 3628 transitions. Word has length 23 [2021-06-05 23:27:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:47,956 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 3628 transitions. [2021-06-05 23:27:47,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:47,956 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 3628 transitions. [2021-06-05 23:27:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:47,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:47,958 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:48,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:48,182 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:48,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1009797930, now seen corresponding path program 20 times [2021-06-05 23:27:48,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:48,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005803461] [2021-06-05 23:27:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:48,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005803461] [2021-06-05 23:27:48,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005803461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:48,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217854904] [2021-06-05 23:27:48,287 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 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 23:27:48,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:48,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:27:48,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:48,819 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:48,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217854904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:48,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:48,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:27:48,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625579943] [2021-06-05 23:27:48,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:27:48,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:27:48,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:48,820 INFO L87 Difference]: Start difference. First operand 773 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:49,017 INFO L93 Difference]: Finished difference Result 828 states and 3794 transitions. [2021-06-05 23:27:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:49,019 INFO L225 Difference]: With dead ends: 828 [2021-06-05 23:27:49,019 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 23:27:49,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:27:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 23:27:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 777. [2021-06-05 23:27:49,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 4.694587628865979) internal successors, (3643), 776 states have internal predecessors, (3643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 3643 transitions. [2021-06-05 23:27:49,032 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 3643 transitions. Word has length 23 [2021-06-05 23:27:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:49,032 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 3643 transitions. [2021-06-05 23:27:49,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 3643 transitions. [2021-06-05 23:27:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:49,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:49,035 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:49,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 23:27:49,255 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:49,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2053733564, now seen corresponding path program 21 times [2021-06-05 23:27:49,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:49,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85674288] [2021-06-05 23:27:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:49,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85674288] [2021-06-05 23:27:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85674288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:49,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751874379] [2021-06-05 23:27:49,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:49,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:27:49,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:49,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:27:49,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:49,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:49,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:49,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:49,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:49,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:49,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:49,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:27:49,547 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:14 [2021-06-05 23:27:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:27:49,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751874379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:49,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:49,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 23:27:49,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179796369] [2021-06-05 23:27:49,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:27:49,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:49,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:27:49,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:27:49,575 INFO L87 Difference]: Start difference. First operand 777 states and 3643 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:49,928 INFO L93 Difference]: Finished difference Result 867 states and 3843 transitions. [2021-06-05 23:27:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:27:49,929 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:49,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:49,931 INFO L225 Difference]: With dead ends: 867 [2021-06-05 23:27:49,931 INFO L226 Difference]: Without dead ends: 861 [2021-06-05 23:27:49,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:49,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-06-05 23:27:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 763. [2021-06-05 23:27:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.66010498687664) internal successors, (3551), 762 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3551 transitions. [2021-06-05 23:27:49,947 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3551 transitions. Word has length 23 [2021-06-05 23:27:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:49,947 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3551 transitions. [2021-06-05 23:27:49,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3551 transitions. [2021-06-05 23:27:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:49,949 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:49,949 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:50,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:50,172 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -50023488, now seen corresponding path program 7 times [2021-06-05 23:27:50,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:50,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865419010] [2021-06-05 23:27:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:50,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:50,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865419010] [2021-06-05 23:27:50,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865419010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:50,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715902164] [2021-06-05 23:27:50,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:27:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:50,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:50,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:50,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:50,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:50,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:50,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:50,444 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:62, output treesize:48 [2021-06-05 23:27:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:50,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715902164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:50,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:50,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 23:27:50,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387941333] [2021-06-05 23:27:50,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:27:50,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:50,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:27:50,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:27:50,548 INFO L87 Difference]: Start difference. First operand 763 states and 3551 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:50,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:50,831 INFO L93 Difference]: Finished difference Result 2342 states and 10200 transitions. [2021-06-05 23:27:50,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:50,832 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:50,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:50,837 INFO L225 Difference]: With dead ends: 2342 [2021-06-05 23:27:50,838 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 23:27:50,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 23:27:50,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1262. [2021-06-05 23:27:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 4.92466296590008) internal successors, (6210), 1261 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 6210 transitions. [2021-06-05 23:27:50,878 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 6210 transitions. Word has length 23 [2021-06-05 23:27:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:50,878 INFO L482 AbstractCegarLoop]: Abstraction has 1262 states and 6210 transitions. [2021-06-05 23:27:50,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 6210 transitions. [2021-06-05 23:27:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:50,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:50,882 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:51,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:51,105 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2123404862, now seen corresponding path program 8 times [2021-06-05 23:27:51,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:51,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706262023] [2021-06-05 23:27:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:51,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:51,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706262023] [2021-06-05 23:27:51,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706262023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:51,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939541117] [2021-06-05 23:27:51,241 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 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 23:27:51,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:51,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:51,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:27:51,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:51,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:51,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:51,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:51,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:51,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:27:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:51,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939541117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:51,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:51,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:27:51,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457467742] [2021-06-05 23:27:51,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:27:51,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:51,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:27:51,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:51,756 INFO L87 Difference]: Start difference. First operand 1262 states and 6210 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:52,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:52,310 INFO L93 Difference]: Finished difference Result 1627 states and 7436 transitions. [2021-06-05 23:27:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:27:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:52,314 INFO L225 Difference]: With dead ends: 1627 [2021-06-05 23:27:52,314 INFO L226 Difference]: Without dead ends: 1589 [2021-06-05 23:27:52,314 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 719.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:27:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-06-05 23:27:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1292. [2021-06-05 23:27:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.918667699457784) internal successors, (6350), 1291 states have internal predecessors, (6350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 6350 transitions. [2021-06-05 23:27:52,339 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 6350 transitions. Word has length 23 [2021-06-05 23:27:52,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:52,340 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 6350 transitions. [2021-06-05 23:27:52,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 6350 transitions. [2021-06-05 23:27:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:52,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:52,343 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:52,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 23:27:52,566 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:52,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:52,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1658839292, now seen corresponding path program 9 times [2021-06-05 23:27:52,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:52,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176918419] [2021-06-05 23:27:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:52,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176918419] [2021-06-05 23:27:52,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176918419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:52,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121214607] [2021-06-05 23:27:52,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:52,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:27:52,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:52,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:27:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:52,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:52,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:53,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:53,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:53,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 23:27:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:53,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121214607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:53,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:53,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:27:53,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165070329] [2021-06-05 23:27:53,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:27:53,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:53,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:27:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:53,041 INFO L87 Difference]: Start difference. First operand 1292 states and 6350 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:53,360 INFO L93 Difference]: Finished difference Result 2364 states and 10664 transitions. [2021-06-05 23:27:53,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:27:53,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:53,367 INFO L225 Difference]: With dead ends: 2364 [2021-06-05 23:27:53,367 INFO L226 Difference]: Without dead ends: 2284 [2021-06-05 23:27:53,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:27:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-06-05 23:27:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 1465. [2021-06-05 23:27:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 5.044398907103825) internal successors, (7385), 1464 states have internal predecessors, (7385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7385 transitions. [2021-06-05 23:27:53,406 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7385 transitions. Word has length 23 [2021-06-05 23:27:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:53,406 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7385 transitions. [2021-06-05 23:27:53,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7385 transitions. [2021-06-05 23:27:53,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:53,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:53,410 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:53,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 23:27:53,625 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:53,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1728663294, now seen corresponding path program 10 times [2021-06-05 23:27:53,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:53,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328829694] [2021-06-05 23:27:53,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:53,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328829694] [2021-06-05 23:27:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328829694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:53,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513860073] [2021-06-05 23:27:53,737 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 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 23:27:53,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:53,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:53,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:27:53,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:53,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:27:53,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:53,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:53,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:27:53,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-06-05 23:27:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:53,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513860073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:53,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:53,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 23:27:53,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11839396] [2021-06-05 23:27:53,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:53,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:53,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:53,937 INFO L87 Difference]: Start difference. First operand 1465 states and 7385 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:54,183 INFO L93 Difference]: Finished difference Result 2052 states and 9700 transitions. [2021-06-05 23:27:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:27:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:54,187 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 23:27:54,187 INFO L226 Difference]: Without dead ends: 2019 [2021-06-05 23:27:54,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:27:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-05 23:27:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1508. [2021-06-05 23:27:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 5.078964830789649) internal successors, (7654), 1507 states have internal predecessors, (7654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 7654 transitions. [2021-06-05 23:27:54,214 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 7654 transitions. Word has length 23 [2021-06-05 23:27:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:54,215 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 7654 transitions. [2021-06-05 23:27:54,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 7654 transitions. [2021-06-05 23:27:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:54,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:54,219 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:54,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 23:27:54,433 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:54,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1215940152, now seen corresponding path program 11 times [2021-06-05 23:27:54,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:54,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344910923] [2021-06-05 23:27:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:54,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:54,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344910923] [2021-06-05 23:27:54,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344910923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:54,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286427059] [2021-06-05 23:27:54,507 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 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 23:27:54,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:27:54,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:54,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:27:54,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:54,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286427059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:54,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:54,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 23:27:54,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336767987] [2021-06-05 23:27:54,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:54,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:54,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:54,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:54,766 INFO L87 Difference]: Start difference. First operand 1508 states and 7654 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:54,980 INFO L93 Difference]: Finished difference Result 2203 states and 10357 transitions. [2021-06-05 23:27:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:27:54,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:54,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:54,986 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 23:27:54,986 INFO L226 Difference]: Without dead ends: 2160 [2021-06-05 23:27:54,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 250.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-06-05 23:27:55,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1464. [2021-06-05 23:27:55,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1463 states have (on average 5.1066302118933695) internal successors, (7471), 1463 states have internal predecessors, (7471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 7471 transitions. [2021-06-05 23:27:55,015 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 7471 transitions. Word has length 23 [2021-06-05 23:27:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:55,015 INFO L482 AbstractCegarLoop]: Abstraction has 1464 states and 7471 transitions. [2021-06-05 23:27:55,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 7471 transitions. [2021-06-05 23:27:55,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:55,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:55,019 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:55,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:55,221 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:55,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:55,222 INFO L82 PathProgramCache]: Analyzing trace with hash 755994684, now seen corresponding path program 12 times [2021-06-05 23:27:55,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:55,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208384941] [2021-06-05 23:27:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:55,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:55,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208384941] [2021-06-05 23:27:55,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208384941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:55,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260043448] [2021-06-05 23:27:55,356 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 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 23:27:55,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:27:55,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:55,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:27:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:55,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260043448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:55,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:55,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:27:55,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747466373] [2021-06-05 23:27:55,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:27:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:27:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:55,795 INFO L87 Difference]: Start difference. First operand 1464 states and 7471 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:56,041 INFO L93 Difference]: Finished difference Result 1548 states and 7764 transitions. [2021-06-05 23:27:56,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:56,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:56,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:56,045 INFO L225 Difference]: With dead ends: 1548 [2021-06-05 23:27:56,045 INFO L226 Difference]: Without dead ends: 1536 [2021-06-05 23:27:56,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 549.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:27:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2021-06-05 23:27:56,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 1474. [2021-06-05 23:27:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 5.104548540393754) internal successors, (7519), 1473 states have internal predecessors, (7519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 7519 transitions. [2021-06-05 23:27:56,067 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 7519 transitions. Word has length 23 [2021-06-05 23:27:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:56,067 INFO L482 AbstractCegarLoop]: Abstraction has 1474 states and 7519 transitions. [2021-06-05 23:27:56,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:56,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 7519 transitions. [2021-06-05 23:27:56,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:56,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:56,071 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:56,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 23:27:56,281 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:56,281 INFO L82 PathProgramCache]: Analyzing trace with hash 75343520, now seen corresponding path program 13 times [2021-06-05 23:27:56,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:56,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759009134] [2021-06-05 23:27:56,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:56,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:56,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:56,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759009134] [2021-06-05 23:27:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759009134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:56,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712234775] [2021-06-05 23:27:56,439 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 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 23:27:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:56,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:27:56,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:56,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712234775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:56,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:56,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:27:56,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95555373] [2021-06-05 23:27:56,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:27:56,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:27:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:56,834 INFO L87 Difference]: Start difference. First operand 1474 states and 7519 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:57,106 INFO L93 Difference]: Finished difference Result 1546 states and 7729 transitions. [2021-06-05 23:27:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:57,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:57,109 INFO L225 Difference]: With dead ends: 1546 [2021-06-05 23:27:57,109 INFO L226 Difference]: Without dead ends: 1534 [2021-06-05 23:27:57,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 560.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:27:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2021-06-05 23:27:57,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1473. [2021-06-05 23:27:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 5.102581521739131) internal successors, (7511), 1472 states have internal predecessors, (7511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:57,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 7511 transitions. [2021-06-05 23:27:57,129 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 7511 transitions. Word has length 23 [2021-06-05 23:27:57,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:57,129 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 7511 transitions. [2021-06-05 23:27:57,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:57,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 7511 transitions. [2021-06-05 23:27:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:57,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:57,159 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:57,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 23:27:57,360 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:57,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:57,360 INFO L82 PathProgramCache]: Analyzing trace with hash 927963324, now seen corresponding path program 14 times [2021-06-05 23:27:57,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:57,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78506764] [2021-06-05 23:27:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:57,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:57,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78506764] [2021-06-05 23:27:57,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78506764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:57,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191466147] [2021-06-05 23:27:57,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:57,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:57,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:57,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:27:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:57,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191466147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:57,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:57,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:27:57,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727710071] [2021-06-05 23:27:57,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:27:57,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:27:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:57,808 INFO L87 Difference]: Start difference. First operand 1473 states and 7511 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:57,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:57,994 INFO L93 Difference]: Finished difference Result 1593 states and 7901 transitions. [2021-06-05 23:27:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:57,997 INFO L225 Difference]: With dead ends: 1593 [2021-06-05 23:27:57,998 INFO L226 Difference]: Without dead ends: 1586 [2021-06-05 23:27:57,998 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 358.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:57,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-06-05 23:27:58,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1485. [2021-06-05 23:27:58,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 5.092991913746631) internal successors, (7558), 1484 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 7558 transitions. [2021-06-05 23:27:58,019 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 7558 transitions. Word has length 23 [2021-06-05 23:27:58,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:58,019 INFO L482 AbstractCegarLoop]: Abstraction has 1485 states and 7558 transitions. [2021-06-05 23:27:58,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:58,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 7558 transitions. [2021-06-05 23:27:58,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:58,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:58,022 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:58,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:58,222 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:58,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:58,223 INFO L82 PathProgramCache]: Analyzing trace with hash -935773730, now seen corresponding path program 15 times [2021-06-05 23:27:58,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:58,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260372648] [2021-06-05 23:27:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:58,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:58,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260372648] [2021-06-05 23:27:58,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260372648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:58,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279452059] [2021-06-05 23:27:58,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:58,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:27:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:27:58,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:58,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279452059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:58,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:58,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:27:58,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536006633] [2021-06-05 23:27:58,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:27:58,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:58,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:27:58,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:58,660 INFO L87 Difference]: Start difference. First operand 1485 states and 7558 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:58,824 INFO L93 Difference]: Finished difference Result 1522 states and 7682 transitions. [2021-06-05 23:27:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:58,828 INFO L225 Difference]: With dead ends: 1522 [2021-06-05 23:27:58,828 INFO L226 Difference]: Without dead ends: 1517 [2021-06-05 23:27:58,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 361.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:58,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-06-05 23:27:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1487. [2021-06-05 23:27:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.088156123822342) internal successors, (7561), 1486 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7561 transitions. [2021-06-05 23:27:58,848 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7561 transitions. Word has length 23 [2021-06-05 23:27:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:58,849 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7561 transitions. [2021-06-05 23:27:58,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7561 transitions. [2021-06-05 23:27:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:58,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:58,851 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:59,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 23:27:59,054 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:59,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:59,054 INFO L82 PathProgramCache]: Analyzing trace with hash 503652088, now seen corresponding path program 16 times [2021-06-05 23:27:59,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:59,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522883747] [2021-06-05 23:27:59,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:59,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522883747] [2021-06-05 23:27:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522883747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506431787] [2021-06-05 23:27:59,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:59,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:59,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:59,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:27:59,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:59,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506431787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:59,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:59,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:27:59,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758498395] [2021-06-05 23:27:59,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:27:59,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:27:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:27:59,673 INFO L87 Difference]: Start difference. First operand 1487 states and 7561 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:59,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:59,895 INFO L93 Difference]: Finished difference Result 1542 states and 7723 transitions. [2021-06-05 23:27:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:27:59,895 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:27:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:59,898 INFO L225 Difference]: With dead ends: 1542 [2021-06-05 23:27:59,899 INFO L226 Difference]: Without dead ends: 1535 [2021-06-05 23:27:59,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:27:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-06-05 23:27:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1487. [2021-06-05 23:27:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 5.090847913862719) internal successors, (7565), 1486 states have internal predecessors, (7565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 7565 transitions. [2021-06-05 23:27:59,919 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 7565 transitions. Word has length 23 [2021-06-05 23:27:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:59,920 INFO L482 AbstractCegarLoop]: Abstraction has 1487 states and 7565 transitions. [2021-06-05 23:27:59,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 7565 transitions. [2021-06-05 23:27:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:59,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:59,922 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:00,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 23:28:00,123 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:00,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1831271002, now seen corresponding path program 17 times [2021-06-05 23:28:00,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:00,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813672207] [2021-06-05 23:28:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:00,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:00,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813672207] [2021-06-05 23:28:00,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813672207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:00,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225060479] [2021-06-05 23:28:00,291 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 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 23:28:00,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 23:28:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:00,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:00,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:00,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:00,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:00,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:00,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225060479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:00,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:00,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:28:00,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941459197] [2021-06-05 23:28:00,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:00,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:00,618 INFO L87 Difference]: Start difference. First operand 1487 states and 7565 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:00,877 INFO L93 Difference]: Finished difference Result 2082 states and 9859 transitions. [2021-06-05 23:28:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:28:00,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:28:00,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:00,881 INFO L225 Difference]: With dead ends: 2082 [2021-06-05 23:28:00,881 INFO L226 Difference]: Without dead ends: 2041 [2021-06-05 23:28:00,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2041 states. [2021-06-05 23:28:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2041 to 1495. [2021-06-05 23:28:00,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 5.153279785809906) internal successors, (7699), 1494 states have internal predecessors, (7699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 7699 transitions. [2021-06-05 23:28:00,917 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 7699 transitions. Word has length 23 [2021-06-05 23:28:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:00,917 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 7699 transitions. [2021-06-05 23:28:00,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:00,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 7699 transitions. [2021-06-05 23:28:00,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:28:00,921 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:00,921 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:01,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 23:28:01,143 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:01,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:01,144 INFO L82 PathProgramCache]: Analyzing trace with hash 487248256, now seen corresponding path program 18 times [2021-06-05 23:28:01,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:01,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206251056] [2021-06-05 23:28:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:01,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:01,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206251056] [2021-06-05 23:28:01,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206251056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:01,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038847614] [2021-06-05 23:28:01,332 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 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 23:28:01,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:01,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038847614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:01,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:01,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:28:01,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193948801] [2021-06-05 23:28:01,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:01,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:01,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:01,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:01,756 INFO L87 Difference]: Start difference. First operand 1495 states and 7699 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:02,078 INFO L93 Difference]: Finished difference Result 1873 states and 8862 transitions. [2021-06-05 23:28:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:28:02,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:28:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:02,082 INFO L225 Difference]: With dead ends: 1873 [2021-06-05 23:28:02,082 INFO L226 Difference]: Without dead ends: 1829 [2021-06-05 23:28:02,082 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:28:02,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-05 23:28:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1491. [2021-06-05 23:28:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 5.063758389261745) internal successors, (7545), 1490 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 7545 transitions. [2021-06-05 23:28:02,105 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 7545 transitions. Word has length 23 [2021-06-05 23:28:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:02,105 INFO L482 AbstractCegarLoop]: Abstraction has 1491 states and 7545 transitions. [2021-06-05 23:28:02,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 7545 transitions. [2021-06-05 23:28:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:28:02,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:02,109 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:02,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 23:28:02,325 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -193402908, now seen corresponding path program 19 times [2021-06-05 23:28:02,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:02,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667835137] [2021-06-05 23:28:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:02,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:02,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667835137] [2021-06-05 23:28:02,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667835137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:02,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902701637] [2021-06-05 23:28:02,445 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:02,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:28:02,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:02,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902701637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:02,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:02,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:28:02,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794394087] [2021-06-05 23:28:02,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:02,961 INFO L87 Difference]: Start difference. First operand 1491 states and 7545 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:03,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:03,277 INFO L93 Difference]: Finished difference Result 1562 states and 7790 transitions. [2021-06-05 23:28:03,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:03,278 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:28:03,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:03,282 INFO L225 Difference]: With dead ends: 1562 [2021-06-05 23:28:03,282 INFO L226 Difference]: Without dead ends: 1557 [2021-06-05 23:28:03,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2021-06-05 23:28:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1498. [2021-06-05 23:28:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1497 states have (on average 5.055444221776887) internal successors, (7568), 1497 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 7568 transitions. [2021-06-05 23:28:03,314 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 7568 transitions. Word has length 23 [2021-06-05 23:28:03,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:03,314 INFO L482 AbstractCegarLoop]: Abstraction has 1498 states and 7568 transitions. [2021-06-05 23:28:03,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 7568 transitions. [2021-06-05 23:28:03,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:28:03,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:03,319 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:03,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:03,536 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:03,536 INFO L82 PathProgramCache]: Analyzing trace with hash 659216896, now seen corresponding path program 20 times [2021-06-05 23:28:03,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:03,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920389504] [2021-06-05 23:28:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:03,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920389504] [2021-06-05 23:28:03,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920389504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411529836] [2021-06-05 23:28:03,679 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 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 23:28:03,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:03,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:03,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:04,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411529836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:04,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:04,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:28:04,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293179325] [2021-06-05 23:28:04,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:04,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:04,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:04,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:04,052 INFO L87 Difference]: Start difference. First operand 1498 states and 7568 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:04,385 INFO L93 Difference]: Finished difference Result 1612 states and 7977 transitions. [2021-06-05 23:28:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:04,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:28:04,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:04,388 INFO L225 Difference]: With dead ends: 1612 [2021-06-05 23:28:04,388 INFO L226 Difference]: Without dead ends: 1607 [2021-06-05 23:28:04,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 598.0ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2021-06-05 23:28:04,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1494. [2021-06-05 23:28:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 5.058271935699933) internal successors, (7552), 1493 states have internal predecessors, (7552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 7552 transitions. [2021-06-05 23:28:04,409 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 7552 transitions. Word has length 23 [2021-06-05 23:28:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:04,409 INFO L482 AbstractCegarLoop]: Abstraction has 1494 states and 7552 transitions. [2021-06-05 23:28:04,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 7552 transitions. [2021-06-05 23:28:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:28:04,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:04,412 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:04,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 23:28:04,617 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:04,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:04,617 INFO L82 PathProgramCache]: Analyzing trace with hash -617714144, now seen corresponding path program 21 times [2021-06-05 23:28:04,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:04,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850459379] [2021-06-05 23:28:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:04,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850459379] [2021-06-05 23:28:04,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850459379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455074638] [2021-06-05 23:28:04,752 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 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 23:28:04,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:28:04,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:04,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:04,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:05,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:05,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455074638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:05,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:05,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 23:28:05,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447407279] [2021-06-05 23:28:05,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:28:05,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:05,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:28:05,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:05,284 INFO L87 Difference]: Start difference. First operand 1494 states and 7552 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:05,524 INFO L93 Difference]: Finished difference Result 1565 states and 7788 transitions. [2021-06-05 23:28:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:05,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 23:28:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:05,527 INFO L225 Difference]: With dead ends: 1565 [2021-06-05 23:28:05,527 INFO L226 Difference]: Without dead ends: 1560 [2021-06-05 23:28:05,527 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-06-05 23:28:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1492. [2021-06-05 23:28:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 5.061032863849765) internal successors, (7546), 1491 states have internal predecessors, (7546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 7546 transitions. [2021-06-05 23:28:05,554 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 7546 transitions. Word has length 23 [2021-06-05 23:28:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:05,554 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 7546 transitions. [2021-06-05 23:28:05,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 7546 transitions. [2021-06-05 23:28:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:05,558 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:05,558 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:05,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:05,781 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:05,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:05,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1197073225, now seen corresponding path program 8 times [2021-06-05 23:28:05,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:05,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025879788] [2021-06-05 23:28:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:05,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025879788] [2021-06-05 23:28:05,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025879788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:05,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106407303] [2021-06-05 23:28:05,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:05,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:05,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:28:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:06,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:06,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:06,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:06,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:06,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:06,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:06,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:06,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:06,137 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:06,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:06,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:06,176 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-06-05 23:28:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:28:06,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106407303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:06,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:06,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 23:28:06,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463033934] [2021-06-05 23:28:06,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:28:06,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:06,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:28:06,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:28:06,265 INFO L87 Difference]: Start difference. First operand 1492 states and 7546 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:06,564 INFO L93 Difference]: Finished difference Result 1515 states and 6870 transitions. [2021-06-05 23:28:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:28:06,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:06,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:06,567 INFO L225 Difference]: With dead ends: 1515 [2021-06-05 23:28:06,567 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 23:28:06,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 23:28:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1269. [2021-06-05 23:28:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 1268 states have (on average 4.833596214511041) internal successors, (6129), 1268 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:06,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 6129 transitions. [2021-06-05 23:28:06,586 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 6129 transitions. Word has length 24 [2021-06-05 23:28:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:06,586 INFO L482 AbstractCegarLoop]: Abstraction has 1269 states and 6129 transitions. [2021-06-05 23:28:06,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 6129 transitions. [2021-06-05 23:28:06,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:06,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:06,589 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:06,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 23:28:06,789 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:06,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash -687625467, now seen corresponding path program 22 times [2021-06-05 23:28:06,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:06,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200750984] [2021-06-05 23:28:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:28:06,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:06,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200750984] [2021-06-05 23:28:06,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200750984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:06,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707125430] [2021-06-05 23:28:06,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:06,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:06,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:06,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 23:28:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:07,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:07,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:07,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:07,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:07,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:07,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:07,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:07,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:07,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:07,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:07,159 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:95, output treesize:67 [2021-06-05 23:28:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:28:07,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707125430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:07,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:07,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 23:28:07,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429245987] [2021-06-05 23:28:07,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:28:07,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:07,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:28:07,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:28:07,268 INFO L87 Difference]: Start difference. First operand 1269 states and 6129 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:07,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:07,457 INFO L93 Difference]: Finished difference Result 1808 states and 7860 transitions. [2021-06-05 23:28:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:28:07,457 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:07,462 INFO L225 Difference]: With dead ends: 1808 [2021-06-05 23:28:07,462 INFO L226 Difference]: Without dead ends: 1773 [2021-06-05 23:28:07,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:28:07,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1773 states. [2021-06-05 23:28:07,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1773 to 1189. [2021-06-05 23:28:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 4.688552188552189) internal successors, (5570), 1188 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 5570 transitions. [2021-06-05 23:28:07,484 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 5570 transitions. Word has length 24 [2021-06-05 23:28:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:07,484 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 5570 transitions. [2021-06-05 23:28:07,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 5570 transitions. [2021-06-05 23:28:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:07,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:07,487 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:07,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:07,687 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1433709073, now seen corresponding path program 22 times [2021-06-05 23:28:07,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:07,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879798680] [2021-06-05 23:28:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:07,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:07,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879798680] [2021-06-05 23:28:07,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879798680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:07,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343134085] [2021-06-05 23:28:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:28:07,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:07,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:08,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343134085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:08,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:08,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:08,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904541715] [2021-06-05 23:28:08,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:08,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:08,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:08,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:08,502 INFO L87 Difference]: Start difference. First operand 1189 states and 5570 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:08,764 INFO L93 Difference]: Finished difference Result 1244 states and 5694 transitions. [2021-06-05 23:28:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:28:08,764 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:08,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:08,767 INFO L225 Difference]: With dead ends: 1244 [2021-06-05 23:28:08,768 INFO L226 Difference]: Without dead ends: 1230 [2021-06-05 23:28:08,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 718.3ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-06-05 23:28:08,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1201. [2021-06-05 23:28:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.66) internal successors, (5592), 1200 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5592 transitions. [2021-06-05 23:28:08,788 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5592 transitions. Word has length 24 [2021-06-05 23:28:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:08,788 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5592 transitions. [2021-06-05 23:28:08,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5592 transitions. [2021-06-05 23:28:08,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:08,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:08,791 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:08,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:08,991 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:08,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:08,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1178323821, now seen corresponding path program 23 times [2021-06-05 23:28:08,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:08,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18585557] [2021-06-05 23:28:08,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:09,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:09,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18585557] [2021-06-05 23:28:09,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18585557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:09,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911361468] [2021-06-05 23:28:09,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:09,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:28:09,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:09,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:09,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:09,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911361468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:09,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:09,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:09,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134652034] [2021-06-05 23:28:09,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:09,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:09,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:09,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:09,612 INFO L87 Difference]: Start difference. First operand 1201 states and 5592 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:09,709 INFO L93 Difference]: Finished difference Result 1221 states and 5632 transitions. [2021-06-05 23:28:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:28:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:09,712 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 23:28:09,712 INFO L226 Difference]: Without dead ends: 1217 [2021-06-05 23:28:09,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-06-05 23:28:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1205. [2021-06-05 23:28:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.649501661129568) internal successors, (5598), 1204 states have internal predecessors, (5598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5598 transitions. [2021-06-05 23:28:09,727 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5598 transitions. Word has length 24 [2021-06-05 23:28:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:09,727 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5598 transitions. [2021-06-05 23:28:09,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5598 transitions. [2021-06-05 23:28:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:09,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:09,730 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:09,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 23:28:09,930 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:09,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1461893903, now seen corresponding path program 24 times [2021-06-05 23:28:09,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:09,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802969977] [2021-06-05 23:28:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:10,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:10,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802969977] [2021-06-05 23:28:10,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802969977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:10,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638594406] [2021-06-05 23:28:10,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:28:10,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:10,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:10,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:10,471 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:10,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:10,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:10,479 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:10,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638594406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:10,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:10,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:10,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886651922] [2021-06-05 23:28:10,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:10,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:10,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:10,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:10,514 INFO L87 Difference]: Start difference. First operand 1205 states and 5598 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:10,712 INFO L93 Difference]: Finished difference Result 1274 states and 5779 transitions. [2021-06-05 23:28:10,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 23:28:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:10,714 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 23:28:10,714 INFO L226 Difference]: Without dead ends: 1261 [2021-06-05 23:28:10,714 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 471.3ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-06-05 23:28:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1207. [2021-06-05 23:28:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 4.650912106135987) internal successors, (5609), 1206 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 5609 transitions. [2021-06-05 23:28:10,730 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 5609 transitions. Word has length 24 [2021-06-05 23:28:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:10,731 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 5609 transitions. [2021-06-05 23:28:10,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 5609 transitions. [2021-06-05 23:28:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:10,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:10,733 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:10,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 23:28:10,934 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:10,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:10,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1808359469, now seen corresponding path program 25 times [2021-06-05 23:28:10,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:10,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955977493] [2021-06-05 23:28:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:11,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:11,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955977493] [2021-06-05 23:28:11,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955977493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:11,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580861312] [2021-06-05 23:28:11,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:11,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:11,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:11,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580861312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:11,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:11,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:11,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40768646] [2021-06-05 23:28:11,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:11,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:11,672 INFO L87 Difference]: Start difference. First operand 1207 states and 5609 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:11,983 INFO L93 Difference]: Finished difference Result 1233 states and 5664 transitions. [2021-06-05 23:28:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:11,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:11,986 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 23:28:11,986 INFO L226 Difference]: Without dead ends: 1225 [2021-06-05 23:28:11,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-06-05 23:28:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1205. [2021-06-05 23:28:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1204 states have (on average 4.646179401993355) internal successors, (5594), 1204 states have internal predecessors, (5594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 5594 transitions. [2021-06-05 23:28:12,001 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 5594 transitions. Word has length 24 [2021-06-05 23:28:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:12,001 INFO L482 AbstractCegarLoop]: Abstraction has 1205 states and 5594 transitions. [2021-06-05 23:28:12,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 5594 transitions. [2021-06-05 23:28:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:12,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:12,003 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:12,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:12,204 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:12,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:12,204 INFO L82 PathProgramCache]: Analyzing trace with hash -800483755, now seen corresponding path program 26 times [2021-06-05 23:28:12,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:12,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950712847] [2021-06-05 23:28:12,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:12,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:12,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950712847] [2021-06-05 23:28:12,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950712847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:12,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537733361] [2021-06-05 23:28:12,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:12,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:12,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:12,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:12,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:12,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:12,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:12,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:12,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537733361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:12,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:12,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:12,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823817280] [2021-06-05 23:28:12,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:12,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:12,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:12,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:12,749 INFO L87 Difference]: Start difference. First operand 1205 states and 5594 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:13,090 INFO L93 Difference]: Finished difference Result 1253 states and 5719 transitions. [2021-06-05 23:28:13,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 23:28:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:13,092 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 23:28:13,092 INFO L226 Difference]: Without dead ends: 1240 [2021-06-05 23:28:13,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 594.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-06-05 23:28:13,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1201. [2021-06-05 23:28:13,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 4.651666666666666) internal successors, (5582), 1200 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 5582 transitions. [2021-06-05 23:28:13,108 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 5582 transitions. Word has length 24 [2021-06-05 23:28:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:13,108 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 5582 transitions. [2021-06-05 23:28:13,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 5582 transitions. [2021-06-05 23:28:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:13,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:13,110 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:13,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:13,312 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:13,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:13,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1506985901, now seen corresponding path program 27 times [2021-06-05 23:28:13,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:13,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487725418] [2021-06-05 23:28:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:13,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:13,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:13,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487725418] [2021-06-05 23:28:13,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487725418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:13,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420100479] [2021-06-05 23:28:13,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:13,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:28:13,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:13,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:13,961 INFO L446 ElimStorePlain]: Different costs {0=[node_2], 1=[v_prenex_27]} [2021-06-05 23:28:13,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:13,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:13,987 INFO L628 ElimStorePlain]: treesize reduction 52, result has 37.3 percent of original size [2021-06-05 23:28:13,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_27 vanished before elimination [2021-06-05 23:28:13,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:13,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:90, output treesize:31 [2021-06-05 23:28:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:14,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420100479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:14,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:14,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:14,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118222618] [2021-06-05 23:28:14,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:14,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:14,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:14,034 INFO L87 Difference]: Start difference. First operand 1201 states and 5582 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:14,502 INFO L93 Difference]: Finished difference Result 1242 states and 5695 transitions. [2021-06-05 23:28:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:14,505 INFO L225 Difference]: With dead ends: 1242 [2021-06-05 23:28:14,505 INFO L226 Difference]: Without dead ends: 1227 [2021-06-05 23:28:14,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:28:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-06-05 23:28:14,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1209. [2021-06-05 23:28:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 4.6490066225165565) internal successors, (5616), 1208 states have internal predecessors, (5616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:14,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 5616 transitions. [2021-06-05 23:28:14,521 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 5616 transitions. Word has length 24 [2021-06-05 23:28:14,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:14,521 INFO L482 AbstractCegarLoop]: Abstraction has 1209 states and 5616 transitions. [2021-06-05 23:28:14,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:14,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 5616 transitions. [2021-06-05 23:28:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:14,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:14,523 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:14,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 23:28:14,724 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:14,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1553209715, now seen corresponding path program 28 times [2021-06-05 23:28:14,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:14,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578928680] [2021-06-05 23:28:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:14,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:14,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578928680] [2021-06-05 23:28:14,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578928680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:14,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545281483] [2021-06-05 23:28:14,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:14,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:14,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:14,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:15,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:15,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:15,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:15,053 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:15,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:15,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:15,082 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 23:28:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:15,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545281483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:15,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 23:28:15,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230674392] [2021-06-05 23:28:15,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:15,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:15,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:15,177 INFO L87 Difference]: Start difference. First operand 1209 states and 5616 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 23:28:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:15,434 INFO L93 Difference]: Finished difference Result 1237 states and 5305 transitions. [2021-06-05 23:28:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:15,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 24 [2021-06-05 23:28:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:15,436 INFO L225 Difference]: With dead ends: 1237 [2021-06-05 23:28:15,436 INFO L226 Difference]: Without dead ends: 1213 [2021-06-05 23:28:15,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-06-05 23:28:15,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1052. [2021-06-05 23:28:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 4.60418648905804) internal successors, (4839), 1051 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 4839 transitions. [2021-06-05 23:28:15,451 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 4839 transitions. Word has length 24 [2021-06-05 23:28:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:15,451 INFO L482 AbstractCegarLoop]: Abstraction has 1052 states and 4839 transitions. [2021-06-05 23:28:15,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 23:28:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 4839 transitions. [2021-06-05 23:28:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:15,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:15,453 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:15,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:15,653 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:15,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:15,653 INFO L82 PathProgramCache]: Analyzing trace with hash 528495791, now seen corresponding path program 29 times [2021-06-05 23:28:15,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:15,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118150698] [2021-06-05 23:28:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:15,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:15,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118150698] [2021-06-05 23:28:15,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118150698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:15,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740192124] [2021-06-05 23:28:15,796 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:15,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:28:15,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:15,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:16,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740192124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:16,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:16,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:16,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096021448] [2021-06-05 23:28:16,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:16,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:16,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:16,275 INFO L87 Difference]: Start difference. First operand 1052 states and 4839 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:16,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:16,489 INFO L93 Difference]: Finished difference Result 1096 states and 4937 transitions. [2021-06-05 23:28:16,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:16,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:16,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:16,491 INFO L225 Difference]: With dead ends: 1096 [2021-06-05 23:28:16,491 INFO L226 Difference]: Without dead ends: 1074 [2021-06-05 23:28:16,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-06-05 23:28:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 1050. [2021-06-05 23:28:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.598665395614871) internal successors, (4824), 1049 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4824 transitions. [2021-06-05 23:28:16,505 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4824 transitions. Word has length 24 [2021-06-05 23:28:16,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:16,505 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4824 transitions. [2021-06-05 23:28:16,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:16,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4824 transitions. [2021-06-05 23:28:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:16,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:16,507 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:16,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:16,708 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1069230183, now seen corresponding path program 30 times [2021-06-05 23:28:16,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:16,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848248247] [2021-06-05 23:28:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:16,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:16,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:16,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848248247] [2021-06-05 23:28:16,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848248247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:16,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306460646] [2021-06-05 23:28:16,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:16,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:16,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:16,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:16,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:17,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:17,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:17,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:17,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 23:28:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:17,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306460646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:17,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:17,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:17,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863593790] [2021-06-05 23:28:17,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:17,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:17,224 INFO L87 Difference]: Start difference. First operand 1050 states and 4824 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:17,374 INFO L93 Difference]: Finished difference Result 1099 states and 4955 transitions. [2021-06-05 23:28:17,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:17,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 23:28:17,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:17,376 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 23:28:17,376 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 23:28:17,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 23:28:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1046. [2021-06-05 23:28:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.604784688995215) internal successors, (4812), 1045 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4812 transitions. [2021-06-05 23:28:17,390 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4812 transitions. Word has length 24 [2021-06-05 23:28:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:17,390 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4812 transitions. [2021-06-05 23:28:17,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4812 transitions. [2021-06-05 23:28:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:17,392 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:17,392 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:17,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 23:28:17,592 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:17,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:17,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1249973783, now seen corresponding path program 31 times [2021-06-05 23:28:17,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:17,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544929238] [2021-06-05 23:28:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:17,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544929238] [2021-06-05 23:28:17,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544929238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:17,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977704058] [2021-06-05 23:28:17,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:17,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:18,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:18,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977704058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:18,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:18,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754504924] [2021-06-05 23:28:18,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:18,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:18,135 INFO L87 Difference]: Start difference. First operand 1046 states and 4812 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:18,394 INFO L93 Difference]: Finished difference Result 1140 states and 5064 transitions. [2021-06-05 23:28:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:18,394 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:18,396 INFO L225 Difference]: With dead ends: 1140 [2021-06-05 23:28:18,396 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 23:28:18,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 515.6ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 23:28:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1059. [2021-06-05 23:28:18,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 4.581285444234404) internal successors, (4847), 1058 states have internal predecessors, (4847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 4847 transitions. [2021-06-05 23:28:18,410 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 4847 transitions. Word has length 24 [2021-06-05 23:28:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:18,410 INFO L482 AbstractCegarLoop]: Abstraction has 1059 states and 4847 transitions. [2021-06-05 23:28:18,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 4847 transitions. [2021-06-05 23:28:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:18,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:18,412 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:18,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:18,614 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:18,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:18,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1775732329, now seen corresponding path program 32 times [2021-06-05 23:28:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:18,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873976639] [2021-06-05 23:28:18,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:18,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:18,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873976639] [2021-06-05 23:28:18,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873976639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:18,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690602800] [2021-06-05 23:28:18,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:18,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:18,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:18,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:18,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:19,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:19,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:19,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:19,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:19,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:19,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690602800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:19,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:19,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:19,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978140507] [2021-06-05 23:28:19,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:19,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:19,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:19,192 INFO L87 Difference]: Start difference. First operand 1059 states and 4847 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:19,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:19,493 INFO L93 Difference]: Finished difference Result 1101 states and 4957 transitions. [2021-06-05 23:28:19,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:28:19,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:19,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:19,495 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 23:28:19,495 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 23:28:19,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 613.7ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:28:19,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 23:28:19,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 1061. [2021-06-05 23:28:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 4.583018867924529) internal successors, (4858), 1060 states have internal predecessors, (4858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 4858 transitions. [2021-06-05 23:28:19,509 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 4858 transitions. Word has length 24 [2021-06-05 23:28:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:19,509 INFO L482 AbstractCegarLoop]: Abstraction has 1061 states and 4858 transitions. [2021-06-05 23:28:19,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:19,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 4858 transitions. [2021-06-05 23:28:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:19,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:19,511 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:19,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:19,711 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:19,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2102593587, now seen corresponding path program 33 times [2021-06-05 23:28:19,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:19,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934107776] [2021-06-05 23:28:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:19,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:19,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934107776] [2021-06-05 23:28:19,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934107776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:19,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265184976] [2021-06-05 23:28:19,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:19,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:28:19,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:20,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265184976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:20,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:20,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:20,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034995629] [2021-06-05 23:28:20,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:20,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:20,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:20,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:20,290 INFO L87 Difference]: Start difference. First operand 1061 states and 4858 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:20,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:20,503 INFO L93 Difference]: Finished difference Result 1142 states and 5070 transitions. [2021-06-05 23:28:20,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:20,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:20,505 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 23:28:20,505 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 23:28:20,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 521.9ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 23:28:20,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1048. [2021-06-05 23:28:20,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.6017191977077365) internal successors, (4818), 1047 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4818 transitions. [2021-06-05 23:28:20,519 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4818 transitions. Word has length 24 [2021-06-05 23:28:20,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:20,519 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4818 transitions. [2021-06-05 23:28:20,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4818 transitions. [2021-06-05 23:28:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:20,521 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:20,522 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:20,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:20,735 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2029878931, now seen corresponding path program 34 times [2021-06-05 23:28:20,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:20,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749955201] [2021-06-05 23:28:20,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:20,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:20,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749955201] [2021-06-05 23:28:20,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749955201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:20,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889842326] [2021-06-05 23:28:20,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:20,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:20,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:28:20,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:21,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889842326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:21,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:21,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-05 23:28:21,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907017758] [2021-06-05 23:28:21,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:21,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:21,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:21,412 INFO L87 Difference]: Start difference. First operand 1048 states and 4818 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:21,876 INFO L93 Difference]: Finished difference Result 1070 states and 4863 transitions. [2021-06-05 23:28:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:21,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:21,879 INFO L225 Difference]: With dead ends: 1070 [2021-06-05 23:28:21,879 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 23:28:21,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 853.5ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:28:21,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 23:28:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1048. [2021-06-05 23:28:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 4.5978987583572115) internal successors, (4814), 1047 states have internal predecessors, (4814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 4814 transitions. [2021-06-05 23:28:21,893 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 4814 transitions. Word has length 24 [2021-06-05 23:28:21,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:21,893 INFO L482 AbstractCegarLoop]: Abstraction has 1048 states and 4814 transitions. [2021-06-05 23:28:21,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:21,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 4814 transitions. [2021-06-05 23:28:21,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:21,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:21,895 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:22,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:22,096 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2094923731, now seen corresponding path program 35 times [2021-06-05 23:28:22,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:22,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43877496] [2021-06-05 23:28:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:22,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:22,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43877496] [2021-06-05 23:28:22,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43877496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:22,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263407021] [2021-06-05 23:28:22,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:22,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:22,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:22,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:22,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:22,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:22,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:22,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:22,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:22,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263407021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:22,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:22,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48960138] [2021-06-05 23:28:22,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:22,770 INFO L87 Difference]: Start difference. First operand 1048 states and 4814 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:23,001 INFO L93 Difference]: Finished difference Result 1107 states and 4970 transitions. [2021-06-05 23:28:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:23,002 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:23,004 INFO L225 Difference]: With dead ends: 1107 [2021-06-05 23:28:23,004 INFO L226 Difference]: Without dead ends: 1092 [2021-06-05 23:28:23,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-06-05 23:28:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1050. [2021-06-05 23:28:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 4.599618684461392) internal successors, (4825), 1049 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 4825 transitions. [2021-06-05 23:28:23,017 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 4825 transitions. Word has length 24 [2021-06-05 23:28:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:23,017 INFO L482 AbstractCegarLoop]: Abstraction has 1050 states and 4825 transitions. [2021-06-05 23:28:23,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 4825 transitions. [2021-06-05 23:28:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:23,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:23,019 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:23,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:23,220 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:23,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1420116913, now seen corresponding path program 36 times [2021-06-05 23:28:23,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:23,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844692133] [2021-06-05 23:28:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:23,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:23,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:23,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844692133] [2021-06-05 23:28:23,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844692133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:23,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658861279] [2021-06-05 23:28:23,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:23,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:28:23,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:23,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:28:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:23,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658861279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:23,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:23,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:23,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235678021] [2021-06-05 23:28:23,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:23,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:23,902 INFO L87 Difference]: Start difference. First operand 1050 states and 4825 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:24,232 INFO L93 Difference]: Finished difference Result 1072 states and 4870 transitions. [2021-06-05 23:28:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:24,235 INFO L225 Difference]: With dead ends: 1072 [2021-06-05 23:28:24,235 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 23:28:24,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 735.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:28:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 23:28:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1046. [2021-06-05 23:28:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 4.598086124401914) internal successors, (4805), 1045 states have internal predecessors, (4805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 4805 transitions. [2021-06-05 23:28:24,251 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 4805 transitions. Word has length 24 [2021-06-05 23:28:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:24,251 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 4805 transitions. [2021-06-05 23:28:24,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 4805 transitions. [2021-06-05 23:28:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:24,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:24,252 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:24,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 23:28:24,453 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:24,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:24,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1692504397, now seen corresponding path program 37 times [2021-06-05 23:28:24,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:24,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475827730] [2021-06-05 23:28:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:24,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475827730] [2021-06-05 23:28:24,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475827730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:24,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464919270] [2021-06-05 23:28:24,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:24,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:25,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464919270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:25,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:25,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:25,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610970293] [2021-06-05 23:28:25,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:25,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:25,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:25,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:25,204 INFO L87 Difference]: Start difference. First operand 1046 states and 4805 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:25,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:25,527 INFO L93 Difference]: Finished difference Result 1067 states and 4747 transitions. [2021-06-05 23:28:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:25,528 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:25,529 INFO L225 Difference]: With dead ends: 1067 [2021-06-05 23:28:25,529 INFO L226 Difference]: Without dead ends: 1049 [2021-06-05 23:28:25,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 749.5ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:25,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-06-05 23:28:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 1009. [2021-06-05 23:28:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 4.565476190476191) internal successors, (4602), 1008 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 4602 transitions. [2021-06-05 23:28:25,542 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 4602 transitions. Word has length 24 [2021-06-05 23:28:25,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:25,542 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 4602 transitions. [2021-06-05 23:28:25,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 4602 transitions. [2021-06-05 23:28:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:25,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:25,544 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:25,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:25,745 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:25,745 INFO L82 PathProgramCache]: Analyzing trace with hash -12313431, now seen corresponding path program 38 times [2021-06-05 23:28:25,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:25,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007464222] [2021-06-05 23:28:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:25,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:25,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007464222] [2021-06-05 23:28:25,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007464222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:25,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658469768] [2021-06-05 23:28:25,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:25,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:25,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:25,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:28:25,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:26,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:26,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:26,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:26,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:26,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:33 [2021-06-05 23:28:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:26,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658469768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:26,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:26,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:28:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163653804] [2021-06-05 23:28:26,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:28:26,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:28:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:28:26,220 INFO L87 Difference]: Start difference. First operand 1009 states and 4602 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:26,502 INFO L93 Difference]: Finished difference Result 1207 states and 4868 transitions. [2021-06-05 23:28:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:26,505 INFO L225 Difference]: With dead ends: 1207 [2021-06-05 23:28:26,505 INFO L226 Difference]: Without dead ends: 1179 [2021-06-05 23:28:26,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 442.8ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-06-05 23:28:26,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 925. [2021-06-05 23:28:26,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 4.41991341991342) internal successors, (4084), 924 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 4084 transitions. [2021-06-05 23:28:26,518 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 4084 transitions. Word has length 24 [2021-06-05 23:28:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:26,518 INFO L482 AbstractCegarLoop]: Abstraction has 925 states and 4084 transitions. [2021-06-05 23:28:26,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:26,518 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 4084 transitions. [2021-06-05 23:28:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:26,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:26,520 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:26,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 23:28:26,720 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash -919528497, now seen corresponding path program 39 times [2021-06-05 23:28:26,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:26,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885870505] [2021-06-05 23:28:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:26,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:26,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885870505] [2021-06-05 23:28:26,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885870505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:26,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341059612] [2021-06-05 23:28:26,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:26,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:28:26,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:26,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:26,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:27,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341059612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:27,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:27,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:27,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098696568] [2021-06-05 23:28:27,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:27,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:27,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:27,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:27,341 INFO L87 Difference]: Start difference. First operand 925 states and 4084 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:27,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:27,819 INFO L93 Difference]: Finished difference Result 955 states and 4153 transitions. [2021-06-05 23:28:27,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:27,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:27,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:27,821 INFO L225 Difference]: With dead ends: 955 [2021-06-05 23:28:27,821 INFO L226 Difference]: Without dead ends: 951 [2021-06-05 23:28:27,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-05 23:28:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 927. [2021-06-05 23:28:27,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 4.411447084233261) internal successors, (4085), 926 states have internal predecessors, (4085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:27,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 4085 transitions. [2021-06-05 23:28:27,832 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 4085 transitions. Word has length 24 [2021-06-05 23:28:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:27,832 INFO L482 AbstractCegarLoop]: Abstraction has 927 states and 4085 transitions. [2021-06-05 23:28:27,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 4085 transitions. [2021-06-05 23:28:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:27,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:27,834 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:28,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 23:28:28,035 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1203098579, now seen corresponding path program 40 times [2021-06-05 23:28:28,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:28,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639208486] [2021-06-05 23:28:28,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:28,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:28,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639208486] [2021-06-05 23:28:28,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639208486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:28,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771796477] [2021-06-05 23:28:28,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:28,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:28,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:28,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:28,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:28,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:28,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:28,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:28,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:28,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771796477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:28,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:28,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:28,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209626589] [2021-06-05 23:28:28,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:28,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:28,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:28,741 INFO L87 Difference]: Start difference. First operand 927 states and 4085 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:29,343 INFO L93 Difference]: Finished difference Result 1002 states and 4289 transitions. [2021-06-05 23:28:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 23:28:29,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:29,346 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 23:28:29,346 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 23:28:29,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 922.4ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:28:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 23:28:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 931. [2021-06-05 23:28:29,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 4.411827956989248) internal successors, (4103), 930 states have internal predecessors, (4103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:29,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 4103 transitions. [2021-06-05 23:28:29,362 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 4103 transitions. Word has length 24 [2021-06-05 23:28:29,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:29,362 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 4103 transitions. [2021-06-05 23:28:29,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:29,362 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 4103 transitions. [2021-06-05 23:28:29,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:29,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:29,364 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:29,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 23:28:29,569 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2067154793, now seen corresponding path program 41 times [2021-06-05 23:28:29,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:29,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131845050] [2021-06-05 23:28:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:29,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:29,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131845050] [2021-06-05 23:28:29,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131845050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:29,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693480403] [2021-06-05 23:28:29,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:29,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:29,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:29,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:30,408 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-05 23:28:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:30,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693480403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:30,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:30,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:30,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387203317] [2021-06-05 23:28:30,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:30,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:30,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:30,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:30,522 INFO L87 Difference]: Start difference. First operand 931 states and 4103 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:30,606 INFO L93 Difference]: Finished difference Result 963 states and 4175 transitions. [2021-06-05 23:28:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:30,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:30,608 INFO L225 Difference]: With dead ends: 963 [2021-06-05 23:28:30,608 INFO L226 Difference]: Without dead ends: 955 [2021-06-05 23:28:30,608 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 754.4ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:30,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-06-05 23:28:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 929. [2021-06-05 23:28:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 4.405172413793103) internal successors, (4088), 928 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 4088 transitions. [2021-06-05 23:28:30,620 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 4088 transitions. Word has length 24 [2021-06-05 23:28:30,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:30,620 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 4088 transitions. [2021-06-05 23:28:30,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 4088 transitions. [2021-06-05 23:28:30,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:30,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:30,621 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:30,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 23:28:30,822 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:30,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:30,822 INFO L82 PathProgramCache]: Analyzing trace with hash -541688431, now seen corresponding path program 42 times [2021-06-05 23:28:30,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:30,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219753482] [2021-06-05 23:28:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:30,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:30,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219753482] [2021-06-05 23:28:30,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219753482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:30,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224818467] [2021-06-05 23:28:30,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:30,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:30,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:31,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:31,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:31,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:31,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:31,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:31,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224818467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:31,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:31,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:31,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720069867] [2021-06-05 23:28:31,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:31,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:31,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:31,287 INFO L87 Difference]: Start difference. First operand 929 states and 4088 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:31,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:31,430 INFO L93 Difference]: Finished difference Result 978 states and 4219 transitions. [2021-06-05 23:28:31,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:31,430 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 23:28:31,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:31,432 INFO L225 Difference]: With dead ends: 978 [2021-06-05 23:28:31,432 INFO L226 Difference]: Without dead ends: 965 [2021-06-05 23:28:31,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2021-06-05 23:28:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 921. [2021-06-05 23:28:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 4.417391304347826) internal successors, (4064), 920 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 4064 transitions. [2021-06-05 23:28:31,445 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 4064 transitions. Word has length 24 [2021-06-05 23:28:31,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:31,445 INFO L482 AbstractCegarLoop]: Abstraction has 921 states and 4064 transitions. [2021-06-05 23:28:31,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 4064 transitions. [2021-06-05 23:28:31,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:31,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:31,447 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:31,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:31,665 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1248190577, now seen corresponding path program 43 times [2021-06-05 23:28:31,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:31,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196814311] [2021-06-05 23:28:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:31,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:31,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196814311] [2021-06-05 23:28:31,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196814311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:31,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502399471] [2021-06-05 23:28:31,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:32,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:32,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:32,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:32,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:32,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:31 [2021-06-05 23:28:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:32,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502399471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:32,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:32,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:32,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470054502] [2021-06-05 23:28:32,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:32,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:32,106 INFO L87 Difference]: Start difference. First operand 921 states and 4064 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:32,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:32,337 INFO L93 Difference]: Finished difference Result 962 states and 4159 transitions. [2021-06-05 23:28:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:32,339 INFO L225 Difference]: With dead ends: 962 [2021-06-05 23:28:32,339 INFO L226 Difference]: Without dead ends: 947 [2021-06-05 23:28:32,340 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:28:32,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-06-05 23:28:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 919. [2021-06-05 23:28:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 4.415032679738562) internal successors, (4053), 918 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 4053 transitions. [2021-06-05 23:28:32,352 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 4053 transitions. Word has length 24 [2021-06-05 23:28:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:32,352 INFO L482 AbstractCegarLoop]: Abstraction has 919 states and 4053 transitions. [2021-06-05 23:28:32,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 4053 transitions. [2021-06-05 23:28:32,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:32,353 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:32,354 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:32,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:32,554 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:32,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1188274925, now seen corresponding path program 44 times [2021-06-05 23:28:32,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:32,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342129969] [2021-06-05 23:28:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:32,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:32,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342129969] [2021-06-05 23:28:32,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342129969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:32,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621026629] [2021-06-05 23:28:32,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:32,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:33,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621026629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:33,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:33,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:33,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549896690] [2021-06-05 23:28:33,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:33,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:33,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:33,080 INFO L87 Difference]: Start difference. First operand 919 states and 4053 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:33,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:33,470 INFO L93 Difference]: Finished difference Result 945 states and 4108 transitions. [2021-06-05 23:28:33,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:33,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:33,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:33,472 INFO L225 Difference]: With dead ends: 945 [2021-06-05 23:28:33,472 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 23:28:33,472 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 23:28:33,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 917. [2021-06-05 23:28:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 4.41703056768559) internal successors, (4046), 916 states have internal predecessors, (4046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 4046 transitions. [2021-06-05 23:28:33,487 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 4046 transitions. Word has length 24 [2021-06-05 23:28:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:33,487 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 4046 transitions. [2021-06-05 23:28:33,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 4046 transitions. [2021-06-05 23:28:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:33,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:33,489 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:33,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 23:28:33,689 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:33,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:33,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1471845007, now seen corresponding path program 45 times [2021-06-05 23:28:33,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:33,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101348848] [2021-06-05 23:28:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:33,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:33,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101348848] [2021-06-05 23:28:33,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101348848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:33,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379210606] [2021-06-05 23:28:33,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:33,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:28:33,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:33,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:33,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:34,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:34,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:34,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:34,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:28:34,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:29 [2021-06-05 23:28:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:34,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379210606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:34,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:34,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 23:28:34,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373744630] [2021-06-05 23:28:34,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:28:34,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:28:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:28:34,268 INFO L87 Difference]: Start difference. First operand 917 states and 4046 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:34,486 INFO L93 Difference]: Finished difference Result 1234 states and 5095 transitions. [2021-06-05 23:28:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:28:34,486 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 24 [2021-06-05 23:28:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:34,489 INFO L225 Difference]: With dead ends: 1234 [2021-06-05 23:28:34,489 INFO L226 Difference]: Without dead ends: 1207 [2021-06-05 23:28:34,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:28:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2021-06-05 23:28:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 959. [2021-06-05 23:28:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.458246346555324) internal successors, (4271), 958 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4271 transitions. [2021-06-05 23:28:34,503 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4271 transitions. Word has length 24 [2021-06-05 23:28:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:34,504 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4271 transitions. [2021-06-05 23:28:34,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 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 23:28:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4271 transitions. [2021-06-05 23:28:34,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:28:34,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:34,506 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:34,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 23:28:34,709 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1798408365, now seen corresponding path program 46 times [2021-06-05 23:28:34,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:34,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616657931] [2021-06-05 23:28:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:34,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616657931] [2021-06-05 23:28:34,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616657931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:34,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000461626] [2021-06-05 23:28:34,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:34,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:34,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:34,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:34,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:35,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000461626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:35,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:35,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:28:35,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786258742] [2021-06-05 23:28:35,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:28:35,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:35,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:28:35,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:35,363 INFO L87 Difference]: Start difference. First operand 959 states and 4271 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:35,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:35,750 INFO L93 Difference]: Finished difference Result 991 states and 4347 transitions. [2021-06-05 23:28:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:35,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 23:28:35,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:35,753 INFO L225 Difference]: With dead ends: 991 [2021-06-05 23:28:35,753 INFO L226 Difference]: Without dead ends: 987 [2021-06-05 23:28:35,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 681.8ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:28:35,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-06-05 23:28:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 959. [2021-06-05 23:28:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 4.449895615866389) internal successors, (4263), 958 states have internal predecessors, (4263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 4263 transitions. [2021-06-05 23:28:35,768 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 4263 transitions. Word has length 24 [2021-06-05 23:28:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:35,768 INFO L482 AbstractCegarLoop]: Abstraction has 959 states and 4263 transitions. [2021-06-05 23:28:35,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 4263 transitions. [2021-06-05 23:28:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:35,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:35,770 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:35,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 23:28:35,985 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:35,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:35,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2054881064, now seen corresponding path program 23 times [2021-06-05 23:28:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:35,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144568750] [2021-06-05 23:28:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:28:36,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:36,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144568750] [2021-06-05 23:28:36,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144568750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440668089] [2021-06-05 23:28:36,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:36,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:36,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:36,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:36,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:36,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:36,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:36,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 23:28:36,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:36,410 INFO L628 ElimStorePlain]: treesize reduction 7, result has 85.7 percent of original size [2021-06-05 23:28:36,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:28:36,412 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:115, output treesize:42 [2021-06-05 23:28:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:28:36,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440668089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:36,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 23:28:36,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044687040] [2021-06-05 23:28:36,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:36,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:36,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:36,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:36,459 INFO L87 Difference]: Start difference. First operand 959 states and 4263 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:36,555 INFO L93 Difference]: Finished difference Result 920 states and 3669 transitions. [2021-06-05 23:28:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:28:36,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:36,557 INFO L225 Difference]: With dead ends: 920 [2021-06-05 23:28:36,557 INFO L226 Difference]: Without dead ends: 892 [2021-06-05 23:28:36,557 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:28:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2021-06-05 23:28:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 763. [2021-06-05 23:28:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 4.2204724409448815) internal successors, (3216), 762 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 3216 transitions. [2021-06-05 23:28:36,566 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 3216 transitions. Word has length 25 [2021-06-05 23:28:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:36,566 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 3216 transitions. [2021-06-05 23:28:36,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 3216 transitions. [2021-06-05 23:28:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:36,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:36,568 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:36,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:36,769 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:36,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1538598462, now seen corresponding path program 47 times [2021-06-05 23:28:36,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:36,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905203533] [2021-06-05 23:28:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:36,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:36,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905203533] [2021-06-05 23:28:36,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905203533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:36,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448607421] [2021-06-05 23:28:36,850 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:36,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:36,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:28:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:37,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:37,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:37,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:37,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:37,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:37,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:37,088 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:109, output treesize:95 [2021-06-05 23:28:37,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:37,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448607421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:37,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:37,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 23:28:37,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123388052] [2021-06-05 23:28:37,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:37,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:37,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:37,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:37,486 INFO L87 Difference]: Start difference. First operand 763 states and 3216 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 23:28:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:37,730 INFO L93 Difference]: Finished difference Result 1219 states and 4777 transitions. [2021-06-05 23:28:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:28:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-06-05 23:28:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:37,733 INFO L225 Difference]: With dead ends: 1219 [2021-06-05 23:28:37,733 INFO L226 Difference]: Without dead ends: 1159 [2021-06-05 23:28:37,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:28:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-06-05 23:28:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 766. [2021-06-05 23:28:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 4.203921568627451) internal successors, (3216), 765 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 3216 transitions. [2021-06-05 23:28:37,744 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 3216 transitions. Word has length 25 [2021-06-05 23:28:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:37,744 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 3216 transitions. [2021-06-05 23:28:37,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 23:28:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 3216 transitions. [2021-06-05 23:28:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:37,745 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:37,745 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:37,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 23:28:37,946 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1293460578, now seen corresponding path program 48 times [2021-06-05 23:28:37,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:37,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299408364] [2021-06-05 23:28:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:38,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299408364] [2021-06-05 23:28:38,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299408364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:38,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184961992] [2021-06-05 23:28:38,149 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:38,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:28:38,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:28:38,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:38,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184961992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:38,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:38,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:38,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155549990] [2021-06-05 23:28:38,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:38,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:38,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:38,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:38,573 INFO L87 Difference]: Start difference. First operand 766 states and 3216 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:38,871 INFO L93 Difference]: Finished difference Result 817 states and 3362 transitions. [2021-06-05 23:28:38,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:38,873 INFO L225 Difference]: With dead ends: 817 [2021-06-05 23:28:38,873 INFO L226 Difference]: Without dead ends: 808 [2021-06-05 23:28:38,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 639.6ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-06-05 23:28:38,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 774. [2021-06-05 23:28:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 4.186287192755498) internal successors, (3236), 773 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:38,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 3236 transitions. [2021-06-05 23:28:38,882 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 3236 transitions. Word has length 25 [2021-06-05 23:28:38,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:38,882 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 3236 transitions. [2021-06-05 23:28:38,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:38,882 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 3236 transitions. [2021-06-05 23:28:38,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:38,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:38,883 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:39,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 23:28:39,084 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:39,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1871613760, now seen corresponding path program 49 times [2021-06-05 23:28:39,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:39,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985125722] [2021-06-05 23:28:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:28:39,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:39,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985125722] [2021-06-05 23:28:39,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985125722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:39,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37672497] [2021-06-05 23:28:39,188 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:39,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:39,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:39,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:39,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:39,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:39,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:39,453 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 23:28:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:28:39,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37672497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:39,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:39,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 23:28:39,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228203502] [2021-06-05 23:28:39,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:39,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:39,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:39,635 INFO L87 Difference]: Start difference. First operand 774 states and 3236 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 23:28:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:39,848 INFO L93 Difference]: Finished difference Result 905 states and 3551 transitions. [2021-06-05 23:28:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:28:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-06-05 23:28:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:39,850 INFO L225 Difference]: With dead ends: 905 [2021-06-05 23:28:39,850 INFO L226 Difference]: Without dead ends: 865 [2021-06-05 23:28:39,850 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:28:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-06-05 23:28:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 778. [2021-06-05 23:28:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 4.175032175032175) internal successors, (3244), 777 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 3244 transitions. [2021-06-05 23:28:39,859 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 3244 transitions. Word has length 25 [2021-06-05 23:28:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:39,859 INFO L482 AbstractCegarLoop]: Abstraction has 778 states and 3244 transitions. [2021-06-05 23:28:39,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 23:28:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 3244 transitions. [2021-06-05 23:28:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:39,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:39,862 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:40,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:40,065 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:40,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1099408196, now seen corresponding path program 50 times [2021-06-05 23:28:40,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:40,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268867314] [2021-06-05 23:28:40,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:40,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:40,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268867314] [2021-06-05 23:28:40,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268867314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:40,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779176659] [2021-06-05 23:28:40,260 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:40,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:40,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779176659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:40,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:40,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:40,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118807340] [2021-06-05 23:28:40,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:40,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:40,813 INFO L87 Difference]: Start difference. First operand 778 states and 3244 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:41,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:41,210 INFO L93 Difference]: Finished difference Result 825 states and 3382 transitions. [2021-06-05 23:28:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:41,210 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:41,212 INFO L225 Difference]: With dead ends: 825 [2021-06-05 23:28:41,212 INFO L226 Difference]: Without dead ends: 816 [2021-06-05 23:28:41,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:28:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-06-05 23:28:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 786. [2021-06-05 23:28:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-06-05 23:28:41,222 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-06-05 23:28:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:41,222 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-06-05 23:28:41,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-06-05 23:28:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:41,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:41,224 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:41,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:41,447 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:41,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:41,447 INFO L82 PathProgramCache]: Analyzing trace with hash 213609916, now seen corresponding path program 51 times [2021-06-05 23:28:41,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:41,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272004908] [2021-06-05 23:28:41,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:41,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:41,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272004908] [2021-06-05 23:28:41,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272004908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:41,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464887839] [2021-06-05 23:28:41,715 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:41,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:28:41,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:41,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:41,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464887839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:42,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:42,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161317169] [2021-06-05 23:28:42,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:42,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:42,387 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:42,863 INFO L93 Difference]: Finished difference Result 833 states and 3402 transitions. [2021-06-05 23:28:42,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:42,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:42,865 INFO L225 Difference]: With dead ends: 833 [2021-06-05 23:28:42,865 INFO L226 Difference]: Without dead ends: 824 [2021-06-05 23:28:42,865 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:28:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-05 23:28:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 786. [2021-06-05 23:28:42,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 4.15796178343949) internal successors, (3264), 785 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 3264 transitions. [2021-06-05 23:28:42,874 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 3264 transitions. Word has length 25 [2021-06-05 23:28:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:42,875 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 3264 transitions. [2021-06-05 23:28:42,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 3264 transitions. [2021-06-05 23:28:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:42,876 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:42,876 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:43,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 23:28:43,077 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 616680640, now seen corresponding path program 52 times [2021-06-05 23:28:43,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:43,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497265037] [2021-06-05 23:28:43,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:43,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:43,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497265037] [2021-06-05 23:28:43,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497265037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:43,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234638505] [2021-06-05 23:28:43,237 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:43,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:43,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:28:43,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:43,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234638505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:43,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:43,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:43,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997856018] [2021-06-05 23:28:43,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:43,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:43,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:43,635 INFO L87 Difference]: Start difference. First operand 786 states and 3264 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:43,891 INFO L93 Difference]: Finished difference Result 860 states and 3503 transitions. [2021-06-05 23:28:43,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:43,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:43,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:43,893 INFO L225 Difference]: With dead ends: 860 [2021-06-05 23:28:43,893 INFO L226 Difference]: Without dead ends: 846 [2021-06-05 23:28:43,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 512.8ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-06-05 23:28:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 803. [2021-06-05 23:28:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.139650872817955) internal successors, (3320), 802 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3320 transitions. [2021-06-05 23:28:43,902 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3320 transitions. Word has length 25 [2021-06-05 23:28:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:43,902 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3320 transitions. [2021-06-05 23:28:43,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3320 transitions. [2021-06-05 23:28:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:43,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:43,904 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:44,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:44,104 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -691603366, now seen corresponding path program 53 times [2021-06-05 23:28:44,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:44,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799027567] [2021-06-05 23:28:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:44,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:44,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799027567] [2021-06-05 23:28:44,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799027567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:44,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615414467] [2021-06-05 23:28:44,254 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:44,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:28:44,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:44,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:44,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615414467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:44,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:44,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:44,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704962878] [2021-06-05 23:28:44,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:44,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:44,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:44,690 INFO L87 Difference]: Start difference. First operand 803 states and 3320 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:44,849 INFO L93 Difference]: Finished difference Result 846 states and 3446 transitions. [2021-06-05 23:28:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:44,852 INFO L225 Difference]: With dead ends: 846 [2021-06-05 23:28:44,852 INFO L226 Difference]: Without dead ends: 837 [2021-06-05 23:28:44,852 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-06-05 23:28:44,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 799. [2021-06-05 23:28:44,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.145363408521304) internal successors, (3308), 798 states have internal predecessors, (3308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3308 transitions. [2021-06-05 23:28:44,866 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3308 transitions. Word has length 25 [2021-06-05 23:28:44,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:44,866 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3308 transitions. [2021-06-05 23:28:44,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:44,866 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3308 transitions. [2021-06-05 23:28:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:44,868 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:44,868 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:45,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:45,091 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:45,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:45,092 INFO L82 PathProgramCache]: Analyzing trace with hash 905805466, now seen corresponding path program 54 times [2021-06-05 23:28:45,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:45,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129053222] [2021-06-05 23:28:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:45,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129053222] [2021-06-05 23:28:45,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129053222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:45,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087174502] [2021-06-05 23:28:45,166 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:45,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:45,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:45,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:45,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:45,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:45,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:45,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:45,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:45,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:45,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:45,419 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-05 23:28:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:45,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087174502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:45,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:45,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 23:28:45,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521421447] [2021-06-05 23:28:45,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:28:45,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:45,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:28:45,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:28:45,616 INFO L87 Difference]: Start difference. First operand 799 states and 3308 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:45,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:45,911 INFO L93 Difference]: Finished difference Result 858 states and 3412 transitions. [2021-06-05 23:28:45,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:28:45,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:45,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:45,913 INFO L225 Difference]: With dead ends: 858 [2021-06-05 23:28:45,913 INFO L226 Difference]: Without dead ends: 826 [2021-06-05 23:28:45,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:45,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2021-06-05 23:28:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 791. [2021-06-05 23:28:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.111392405063291) internal successors, (3248), 790 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:45,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3248 transitions. [2021-06-05 23:28:45,922 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3248 transitions. Word has length 25 [2021-06-05 23:28:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:45,922 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3248 transitions. [2021-06-05 23:28:45,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3248 transitions. [2021-06-05 23:28:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:45,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:45,923 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:46,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 23:28:46,124 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:46,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:46,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1044989208, now seen corresponding path program 55 times [2021-06-05 23:28:46,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:46,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953743756] [2021-06-05 23:28:46,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:46,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:46,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:46,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953743756] [2021-06-05 23:28:46,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953743756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:46,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560704805] [2021-06-05 23:28:46,280 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:28:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:46,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560704805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:46,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:46,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:46,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294433941] [2021-06-05 23:28:46,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:46,778 INFO L87 Difference]: Start difference. First operand 791 states and 3248 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:47,035 INFO L93 Difference]: Finished difference Result 834 states and 3374 transitions. [2021-06-05 23:28:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:47,035 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:47,036 INFO L225 Difference]: With dead ends: 834 [2021-06-05 23:28:47,036 INFO L226 Difference]: Without dead ends: 825 [2021-06-05 23:28:47,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-06-05 23:28:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 803. [2021-06-05 23:28:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.103491271820449) internal successors, (3291), 802 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:47,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3291 transitions. [2021-06-05 23:28:47,046 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3291 transitions. Word has length 25 [2021-06-05 23:28:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:47,046 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3291 transitions. [2021-06-05 23:28:47,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3291 transitions. [2021-06-05 23:28:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:47,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:47,047 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:47,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:47,248 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:47,248 INFO L82 PathProgramCache]: Analyzing trace with hash 200017756, now seen corresponding path program 56 times [2021-06-05 23:28:47,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:47,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204281879] [2021-06-05 23:28:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:47,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204281879] [2021-06-05 23:28:47,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204281879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333115813] [2021-06-05 23:28:47,433 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:47,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:47,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333115813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:47,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:47,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:47,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750048603] [2021-06-05 23:28:47,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:47,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:47,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:47,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:47,972 INFO L87 Difference]: Start difference. First operand 803 states and 3291 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:48,261 INFO L93 Difference]: Finished difference Result 842 states and 3405 transitions. [2021-06-05 23:28:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:48,261 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:48,263 INFO L225 Difference]: With dead ends: 842 [2021-06-05 23:28:48,263 INFO L226 Difference]: Without dead ends: 833 [2021-06-05 23:28:48,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 644.8ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:28:48,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-06-05 23:28:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 799. [2021-06-05 23:28:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.109022556390977) internal successors, (3279), 798 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3279 transitions. [2021-06-05 23:28:48,273 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3279 transitions. Word has length 25 [2021-06-05 23:28:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:48,273 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3279 transitions. [2021-06-05 23:28:48,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3279 transitions. [2021-06-05 23:28:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:48,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:48,274 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:48,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:48,475 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:48,475 INFO L82 PathProgramCache]: Analyzing trace with hash 875475964, now seen corresponding path program 57 times [2021-06-05 23:28:48,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:48,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299785643] [2021-06-05 23:28:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:48,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:48,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299785643] [2021-06-05 23:28:48,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299785643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:48,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413999915] [2021-06-05 23:28:48,650 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:48,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:28:48,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:48,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:48,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:49,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413999915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:49,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:49,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974466639] [2021-06-05 23:28:49,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:49,143 INFO L87 Difference]: Start difference. First operand 799 states and 3279 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:49,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:49,450 INFO L93 Difference]: Finished difference Result 838 states and 3397 transitions. [2021-06-05 23:28:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:49,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:49,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:49,451 INFO L225 Difference]: With dead ends: 838 [2021-06-05 23:28:49,452 INFO L226 Difference]: Without dead ends: 829 [2021-06-05 23:28:49,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 703.8ms TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:28:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-06-05 23:28:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 791. [2021-06-05 23:28:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 4.125316455696202) internal successors, (3259), 790 states have internal predecessors, (3259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 3259 transitions. [2021-06-05 23:28:49,461 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 3259 transitions. Word has length 25 [2021-06-05 23:28:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:49,461 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 3259 transitions. [2021-06-05 23:28:49,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 3259 transitions. [2021-06-05 23:28:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:49,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:49,463 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:49,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 23:28:49,663 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1303784532, now seen corresponding path program 58 times [2021-06-05 23:28:49,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:49,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248325801] [2021-06-05 23:28:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:49,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:49,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248325801] [2021-06-05 23:28:49,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248325801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:49,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346890770] [2021-06-05 23:28:49,914 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:49,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:49,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:28:49,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:50,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346890770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:50,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:50,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445251866] [2021-06-05 23:28:50,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:50,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:50,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:50,397 INFO L87 Difference]: Start difference. First operand 791 states and 3259 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:50,642 INFO L93 Difference]: Finished difference Result 828 states and 3368 transitions. [2021-06-05 23:28:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:50,645 INFO L225 Difference]: With dead ends: 828 [2021-06-05 23:28:50,645 INFO L226 Difference]: Without dead ends: 819 [2021-06-05 23:28:50,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 681.2ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:28:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-06-05 23:28:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 785. [2021-06-05 23:28:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 4.135204081632653) internal successors, (3242), 784 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 3242 transitions. [2021-06-05 23:28:50,659 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 3242 transitions. Word has length 25 [2021-06-05 23:28:50,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:50,659 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 3242 transitions. [2021-06-05 23:28:50,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 3242 transitions. [2021-06-05 23:28:50,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:50,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:50,660 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:50,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:50,883 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1856262014, now seen corresponding path program 59 times [2021-06-05 23:28:50,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:50,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747291935] [2021-06-05 23:28:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:50,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747291935] [2021-06-05 23:28:50,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747291935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008071706] [2021-06-05 23:28:50,967 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:51,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:51,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:51,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:28:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:51,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:51,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:51,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:51,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:51,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:51,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:51,209 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-05 23:28:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:51,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008071706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:51,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:51,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:28:51,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841409929] [2021-06-05 23:28:51,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:28:51,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:51,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:28:51,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:28:51,477 INFO L87 Difference]: Start difference. First operand 785 states and 3242 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:51,723 INFO L93 Difference]: Finished difference Result 1456 states and 5972 transitions. [2021-06-05 23:28:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:51,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:51,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:51,726 INFO L225 Difference]: With dead ends: 1456 [2021-06-05 23:28:51,726 INFO L226 Difference]: Without dead ends: 1428 [2021-06-05 23:28:51,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-06-05 23:28:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1013. [2021-06-05 23:28:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 4.450592885375494) internal successors, (4504), 1012 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 4504 transitions. [2021-06-05 23:28:51,747 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 4504 transitions. Word has length 25 [2021-06-05 23:28:51,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:51,748 INFO L482 AbstractCegarLoop]: Abstraction has 1013 states and 4504 transitions. [2021-06-05 23:28:51,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 4504 transitions. [2021-06-05 23:28:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:51,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:51,750 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:51,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:51,964 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1459349340, now seen corresponding path program 60 times [2021-06-05 23:28:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:51,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162915067] [2021-06-05 23:28:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:51,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:52,184 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:52,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:52,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162915067] [2021-06-05 23:28:52,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162915067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:52,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838020295] [2021-06-05 23:28:52,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:52,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:28:52,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:52,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:52,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838020295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:52,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:52,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:52,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23130899] [2021-06-05 23:28:52,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:52,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:52,701 INFO L87 Difference]: Start difference. First operand 1013 states and 4504 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:52,977 INFO L93 Difference]: Finished difference Result 1046 states and 4594 transitions. [2021-06-05 23:28:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:28:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:52,979 INFO L225 Difference]: With dead ends: 1046 [2021-06-05 23:28:52,979 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 23:28:52,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 686.1ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 23:28:52,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1020. [2021-06-05 23:28:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1019 states have (on average 4.439646712463199) internal successors, (4524), 1019 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 4524 transitions. [2021-06-05 23:28:52,992 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 4524 transitions. Word has length 25 [2021-06-05 23:28:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:52,992 INFO L482 AbstractCegarLoop]: Abstraction has 1020 states and 4524 transitions. [2021-06-05 23:28:52,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 4524 transitions. [2021-06-05 23:28:52,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:52,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:52,993 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:53,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 23:28:53,194 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1035038104, now seen corresponding path program 61 times [2021-06-05 23:28:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:53,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395742428] [2021-06-05 23:28:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395742428] [2021-06-05 23:28:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395742428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480650060] [2021-06-05 23:28:53,329 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:53,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:28:53,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:53,881 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:53,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480650060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:53,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:53,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:53,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329916857] [2021-06-05 23:28:53,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:53,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:53,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:53,883 INFO L87 Difference]: Start difference. First operand 1020 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:54,307 INFO L93 Difference]: Finished difference Result 1059 states and 4642 transitions. [2021-06-05 23:28:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:28:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:54,309 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 23:28:54,309 INFO L226 Difference]: Without dead ends: 1050 [2021-06-05 23:28:54,310 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 796.3ms TimeCoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:28:54,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-06-05 23:28:54,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1023. [2021-06-05 23:28:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 4.448140900195694) internal successors, (4546), 1022 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 4546 transitions. [2021-06-05 23:28:54,323 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 4546 transitions. Word has length 25 [2021-06-05 23:28:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:54,323 INFO L482 AbstractCegarLoop]: Abstraction has 1023 states and 4546 transitions. [2021-06-05 23:28:54,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:54,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 4546 transitions. [2021-06-05 23:28:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:54,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:54,325 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:54,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:54,525 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash 190066652, now seen corresponding path program 62 times [2021-06-05 23:28:54,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:54,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290427188] [2021-06-05 23:28:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:54,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290427188] [2021-06-05 23:28:54,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290427188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:54,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468324178] [2021-06-05 23:28:54,726 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:54,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:28:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:28:54,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:55,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468324178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:55,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:55,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:55,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7491926] [2021-06-05 23:28:55,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:55,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:55,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:55,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:55,320 INFO L87 Difference]: Start difference. First operand 1023 states and 4546 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:55,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:55,616 INFO L93 Difference]: Finished difference Result 1064 states and 4663 transitions. [2021-06-05 23:28:55,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:55,617 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:55,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:55,618 INFO L225 Difference]: With dead ends: 1064 [2021-06-05 23:28:55,618 INFO L226 Difference]: Without dead ends: 1055 [2021-06-05 23:28:55,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 769.8ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:28:55,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-06-05 23:28:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1017. [2021-06-05 23:28:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1016 states have (on average 4.457677165354331) internal successors, (4529), 1016 states have internal predecessors, (4529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 4529 transitions. [2021-06-05 23:28:55,631 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 4529 transitions. Word has length 25 [2021-06-05 23:28:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:55,631 INFO L482 AbstractCegarLoop]: Abstraction has 1017 states and 4529 transitions. [2021-06-05 23:28:55,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 4529 transitions. [2021-06-05 23:28:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:55,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:55,633 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:55,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:55,834 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:55,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1860740126, now seen corresponding path program 63 times [2021-06-05 23:28:55,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:55,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225539635] [2021-06-05 23:28:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:56,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:56,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225539635] [2021-06-05 23:28:56,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225539635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:56,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420130402] [2021-06-05 23:28:56,013 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:56,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:28:56,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:28:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:56,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420130402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:56,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:56,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:56,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531222856] [2021-06-05 23:28:56,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:56,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:56,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:56,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:56,635 INFO L87 Difference]: Start difference. First operand 1017 states and 4529 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:57,155 INFO L93 Difference]: Finished difference Result 1054 states and 4614 transitions. [2021-06-05 23:28:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:57,157 INFO L225 Difference]: With dead ends: 1054 [2021-06-05 23:28:57,157 INFO L226 Difference]: Without dead ends: 1041 [2021-06-05 23:28:57,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 954.3ms TimeCoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:28:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-06-05 23:28:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 1011. [2021-06-05 23:28:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 4.461386138613862) internal successors, (4506), 1010 states have internal predecessors, (4506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 4506 transitions. [2021-06-05 23:28:57,170 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 4506 transitions. Word has length 25 [2021-06-05 23:28:57,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:57,170 INFO L482 AbstractCegarLoop]: Abstraction has 1011 states and 4506 transitions. [2021-06-05 23:28:57,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 4506 transitions. [2021-06-05 23:28:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:57,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:57,172 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:57,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 23:28:57,373 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1856073988, now seen corresponding path program 64 times [2021-06-05 23:28:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:57,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299929837] [2021-06-05 23:28:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:57,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:57,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299929837] [2021-06-05 23:28:57,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299929837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:57,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790182086] [2021-06-05 23:28:57,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:57,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:28:57,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:57,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:28:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:57,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:57,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:57,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:28:57,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:28:57,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:28:57,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:28:57,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 23:28:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:28:57,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790182086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:57,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:57,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2021-06-05 23:28:57,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997553720] [2021-06-05 23:28:57,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:28:57,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:57,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:28:57,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:28:57,803 INFO L87 Difference]: Start difference. First operand 1011 states and 4506 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23:28:58,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:58,084 INFO L93 Difference]: Finished difference Result 1144 states and 4731 transitions. [2021-06-05 23:28:58,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:28:58,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 25 [2021-06-05 23:28:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:58,087 INFO L225 Difference]: With dead ends: 1144 [2021-06-05 23:28:58,087 INFO L226 Difference]: Without dead ends: 1094 [2021-06-05 23:28:58,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:28:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-05 23:28:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 976. [2021-06-05 23:28:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 4.441025641025641) internal successors, (4330), 975 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:58,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 4330 transitions. [2021-06-05 23:28:58,098 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 4330 transitions. Word has length 25 [2021-06-05 23:28:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:58,099 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 4330 transitions. [2021-06-05 23:28:58,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23:28:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 4330 transitions. [2021-06-05 23:28:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:58,100 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:58,100 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:58,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 23:28:58,301 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash 532128648, now seen corresponding path program 65 times [2021-06-05 23:28:58,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:58,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273239739] [2021-06-05 23:28:58,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:58,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:58,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273239739] [2021-06-05 23:28:58,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273239739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:58,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836508895] [2021-06-05 23:28:58,501 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:58,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:28:58,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:58,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:28:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:59,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836508895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:59,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:28:59,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:28:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365143141] [2021-06-05 23:28:59,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:28:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:28:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:28:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:28:59,090 INFO L87 Difference]: Start difference. First operand 976 states and 4330 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:59,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:28:59,565 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-06-05 23:28:59,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:28:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:28:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:28:59,567 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 23:28:59,567 INFO L226 Difference]: Without dead ends: 1024 [2021-06-05 23:28:59,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 914.2ms TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:28:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-05 23:28:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 980. [2021-06-05 23:28:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 979 states have (on average 4.435137895812053) internal successors, (4342), 979 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 4342 transitions. [2021-06-05 23:28:59,579 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 4342 transitions. Word has length 25 [2021-06-05 23:28:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:28:59,580 INFO L482 AbstractCegarLoop]: Abstraction has 980 states and 4342 transitions. [2021-06-05 23:28:59,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:28:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 4342 transitions. [2021-06-05 23:28:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:28:59,581 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:28:59,581 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:28:59,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 23:28:59,782 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:28:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:28:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash -353669632, now seen corresponding path program 66 times [2021-06-05 23:28:59,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:28:59,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678476526] [2021-06-05 23:28:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:28:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:28:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:28:59,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:28:59,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678476526] [2021-06-05 23:28:59,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678476526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:28:59,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364557232] [2021-06-05 23:28:59,932 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:28:59,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:28:59,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:28:59,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:28:59,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:00,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364557232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:00,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:00,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:00,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398493603] [2021-06-05 23:29:00,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:00,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:00,618 INFO L87 Difference]: Start difference. First operand 980 states and 4342 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:00,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:00,919 INFO L93 Difference]: Finished difference Result 1033 states and 4491 transitions. [2021-06-05 23:29:00,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:00,919 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:00,921 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 23:29:00,921 INFO L226 Difference]: Without dead ends: 1024 [2021-06-05 23:29:00,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 772.9ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:00,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-06-05 23:29:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 974. [2021-06-05 23:29:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-06-05 23:29:00,939 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-06-05 23:29:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:00,939 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-06-05 23:29:00,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:00,939 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-06-05 23:29:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:00,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:00,941 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:01,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:01,157 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash 49401092, now seen corresponding path program 67 times [2021-06-05 23:29:01,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:01,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785081043] [2021-06-05 23:29:01,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:01,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:01,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785081043] [2021-06-05 23:29:01,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785081043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:01,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217996335] [2021-06-05 23:29:01,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:01,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:29:01,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:01,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217996335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:01,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:01,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838429839] [2021-06-05 23:29:01,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:01,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:01,762 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:02,157 INFO L93 Difference]: Finished difference Result 1017 states and 4451 transitions. [2021-06-05 23:29:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:29:02,157 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:02,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:02,159 INFO L225 Difference]: With dead ends: 1017 [2021-06-05 23:29:02,159 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 23:29:02,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 689.0ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 23:29:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 974. [2021-06-05 23:29:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.445015416238438) internal successors, (4325), 973 states have internal predecessors, (4325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4325 transitions. [2021-06-05 23:29:02,172 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4325 transitions. Word has length 25 [2021-06-05 23:29:02,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:02,172 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4325 transitions. [2021-06-05 23:29:02,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:02,172 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4325 transitions. [2021-06-05 23:29:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:02,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:02,173 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:02,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:02,374 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash -234168990, now seen corresponding path program 68 times [2021-06-05 23:29:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:02,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714615302] [2021-06-05 23:29:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:02,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:02,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714615302] [2021-06-05 23:29:02,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714615302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:02,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136092199] [2021-06-05 23:29:02,442 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:02,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:02,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:02,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:29:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:02,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:02,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:02,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:02,760 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:02,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:02,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:02,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-05 23:29:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:02,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136092199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:02,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 23:29:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021846090] [2021-06-05 23:29:02,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:29:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:29:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:29:02,953 INFO L87 Difference]: Start difference. First operand 974 states and 4325 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23:29:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:03,272 INFO L93 Difference]: Finished difference Result 2052 states and 8564 transitions. [2021-06-05 23:29:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:29:03,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 25 [2021-06-05 23:29:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:03,276 INFO L225 Difference]: With dead ends: 2052 [2021-06-05 23:29:03,276 INFO L226 Difference]: Without dead ends: 2008 [2021-06-05 23:29:03,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 445.3ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:29:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-06-05 23:29:03,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1253. [2021-06-05 23:29:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 4.634984025559105) internal successors, (5803), 1252 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 5803 transitions. [2021-06-05 23:29:03,304 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 5803 transitions. Word has length 25 [2021-06-05 23:29:03,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:03,304 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 5803 transitions. [2021-06-05 23:29:03,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23:29:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 5803 transitions. [2021-06-05 23:29:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:03,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:03,306 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:03,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 23:29:03,506 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:03,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1258882914, now seen corresponding path program 69 times [2021-06-05 23:29:03,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:03,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291178644] [2021-06-05 23:29:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:03,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291178644] [2021-06-05 23:29:03,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291178644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:03,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647704298] [2021-06-05 23:29:03,679 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:03,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:29:03,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:04,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647704298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:04,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:04,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:04,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925384059] [2021-06-05 23:29:04,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:04,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:04,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:04,161 INFO L87 Difference]: Start difference. First operand 1253 states and 5803 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:04,456 INFO L93 Difference]: Finished difference Result 1300 states and 5927 transitions. [2021-06-05 23:29:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:04,459 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 23:29:04,459 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 23:29:04,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 666.8ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:29:04,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 23:29:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1257. [2021-06-05 23:29:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 4.629777070063694) internal successors, (5815), 1256 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 5815 transitions. [2021-06-05 23:29:04,475 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 5815 transitions. Word has length 25 [2021-06-05 23:29:04,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:04,475 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 5815 transitions. [2021-06-05 23:29:04,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 5815 transitions. [2021-06-05 23:29:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:04,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:04,477 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:04,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:04,680 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash 338525918, now seen corresponding path program 70 times [2021-06-05 23:29:04,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:04,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577643087] [2021-06-05 23:29:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:04,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:04,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577643087] [2021-06-05 23:29:04,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577643087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:04,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750014094] [2021-06-05 23:29:04,769 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:04,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:04,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:04,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:29:04,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:04,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:04,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:04,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:04,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:05,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:05,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:05,013 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:81, output treesize:67 [2021-06-05 23:29:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:05,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750014094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:05,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:05,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-05 23:29:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631127640] [2021-06-05 23:29:05,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:29:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:05,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:29:05,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:29:05,141 INFO L87 Difference]: Start difference. First operand 1257 states and 5815 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:05,422 INFO L93 Difference]: Finished difference Result 1292 states and 5884 transitions. [2021-06-05 23:29:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 23:29:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:05,424 INFO L225 Difference]: With dead ends: 1292 [2021-06-05 23:29:05,425 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 23:29:05,425 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:29:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 23:29:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1251. [2021-06-05 23:29:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 4.6256) internal successors, (5782), 1250 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 5782 transitions. [2021-06-05 23:29:05,441 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 5782 transitions. Word has length 25 [2021-06-05 23:29:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:05,441 INFO L482 AbstractCegarLoop]: Abstraction has 1251 states and 5782 transitions. [2021-06-05 23:29:05,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 5782 transitions. [2021-06-05 23:29:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:05,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:05,443 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:05,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2021-06-05 23:29:05,643 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:05,643 INFO L82 PathProgramCache]: Analyzing trace with hash 477709660, now seen corresponding path program 71 times [2021-06-05 23:29:05,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:05,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347952498] [2021-06-05 23:29:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:05,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:05,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347952498] [2021-06-05 23:29:05,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347952498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:05,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416723162] [2021-06-05 23:29:05,826 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:05,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:29:05,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:05,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:06,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416723162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:06,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:06,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:06,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986247087] [2021-06-05 23:29:06,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:06,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:06,291 INFO L87 Difference]: Start difference. First operand 1251 states and 5782 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:06,579 INFO L93 Difference]: Finished difference Result 1290 states and 5886 transitions. [2021-06-05 23:29:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:29:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:06,581 INFO L225 Difference]: With dead ends: 1290 [2021-06-05 23:29:06,581 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 23:29:06,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:29:06,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 23:29:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1249. [2021-06-05 23:29:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 4.6306089743589745) internal successors, (5779), 1248 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 5779 transitions. [2021-06-05 23:29:06,599 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 5779 transitions. Word has length 25 [2021-06-05 23:29:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:06,599 INFO L482 AbstractCegarLoop]: Abstraction has 1249 states and 5779 transitions. [2021-06-05 23:29:06,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 5779 transitions. [2021-06-05 23:29:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:06,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:06,601 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:06,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable336,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:06,801 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:06,802 INFO L82 PathProgramCache]: Analyzing trace with hash -367261792, now seen corresponding path program 72 times [2021-06-05 23:29:06,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:06,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072004084] [2021-06-05 23:29:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:06,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:06,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072004084] [2021-06-05 23:29:06,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072004084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:06,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407120139] [2021-06-05 23:29:06,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:06,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:29:06,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:06,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:29:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:07,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407120139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:07,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:07,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:07,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074662056] [2021-06-05 23:29:07,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:07,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:07,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:07,493 INFO L87 Difference]: Start difference. First operand 1249 states and 5779 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:07,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:07,864 INFO L93 Difference]: Finished difference Result 1291 states and 5884 transitions. [2021-06-05 23:29:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:07,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:07,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:07,867 INFO L225 Difference]: With dead ends: 1291 [2021-06-05 23:29:07,867 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 23:29:07,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:29:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 23:29:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1240. [2021-06-05 23:29:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1239 states have (on average 4.642453591606134) internal successors, (5752), 1239 states have internal predecessors, (5752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 5752 transitions. [2021-06-05 23:29:07,884 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 5752 transitions. Word has length 25 [2021-06-05 23:29:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:07,884 INFO L482 AbstractCegarLoop]: Abstraction has 1240 states and 5752 transitions. [2021-06-05 23:29:07,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 5752 transitions. [2021-06-05 23:29:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:07,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:07,886 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:08,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable339 [2021-06-05 23:29:08,086 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1601944802, now seen corresponding path program 73 times [2021-06-05 23:29:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:08,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139826615] [2021-06-05 23:29:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:08,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139826615] [2021-06-05 23:29:08,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139826615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770825995] [2021-06-05 23:29:08,222 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:08,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:08,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:08,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770825995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:08,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:08,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:08,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72439622] [2021-06-05 23:29:08,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:08,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:08,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:08,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:08,749 INFO L87 Difference]: Start difference. First operand 1240 states and 5752 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:09,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:09,251 INFO L93 Difference]: Finished difference Result 1276 states and 5860 transitions. [2021-06-05 23:29:09,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:29:09,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:09,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:09,254 INFO L225 Difference]: With dead ends: 1276 [2021-06-05 23:29:09,254 INFO L226 Difference]: Without dead ends: 1267 [2021-06-05 23:29:09,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 853.3ms TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:29:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-06-05 23:29:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1229. [2021-06-05 23:29:09,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 4.662866449511401) internal successors, (5726), 1228 states have internal predecessors, (5726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 5726 transitions. [2021-06-05 23:29:09,270 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 5726 transitions. Word has length 25 [2021-06-05 23:29:09,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:09,270 INFO L482 AbstractCegarLoop]: Abstraction has 1229 states and 5726 transitions. [2021-06-05 23:29:09,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:09,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 5726 transitions. [2021-06-05 23:29:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:09,272 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:09,272 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:09,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 23:29:09,474 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:09,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:09,474 INFO L82 PathProgramCache]: Analyzing trace with hash 790923972, now seen corresponding path program 74 times [2021-06-05 23:29:09,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:09,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664100982] [2021-06-05 23:29:09,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:09,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:09,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664100982] [2021-06-05 23:29:09,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664100982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:09,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067821499] [2021-06-05 23:29:09,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:09,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:09,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:09,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:29:09,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:10,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067821499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:10,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:10,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:10,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098931398] [2021-06-05 23:29:10,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:10,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:10,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:10,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:10,294 INFO L87 Difference]: Start difference. First operand 1229 states and 5726 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:10,736 INFO L93 Difference]: Finished difference Result 1274 states and 5850 transitions. [2021-06-05 23:29:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:29:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:10,739 INFO L225 Difference]: With dead ends: 1274 [2021-06-05 23:29:10,739 INFO L226 Difference]: Without dead ends: 1265 [2021-06-05 23:29:10,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 918.8ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:10,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-06-05 23:29:10,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1221. [2021-06-05 23:29:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 4.677049180327868) internal successors, (5706), 1220 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 5706 transitions. [2021-06-05 23:29:10,756 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 5706 transitions. Word has length 25 [2021-06-05 23:29:10,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:10,757 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 5706 transitions. [2021-06-05 23:29:10,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:10,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 5706 transitions. [2021-06-05 23:29:10,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:29:10,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:10,759 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:10,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 23:29:10,965 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:10,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash -94874308, now seen corresponding path program 75 times [2021-06-05 23:29:10,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:10,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662054807] [2021-06-05 23:29:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:11,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:11,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662054807] [2021-06-05 23:29:11,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662054807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:11,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968357549] [2021-06-05 23:29:11,110 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:11,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:29:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:11,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968357549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:11,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:11,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:29:11,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258557590] [2021-06-05 23:29:11,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:29:11,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:11,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:29:11,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:11,760 INFO L87 Difference]: Start difference. First operand 1221 states and 5706 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:12,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:12,241 INFO L93 Difference]: Finished difference Result 1266 states and 5830 transitions. [2021-06-05 23:29:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:29:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 23:29:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:12,243 INFO L225 Difference]: With dead ends: 1266 [2021-06-05 23:29:12,243 INFO L226 Difference]: Without dead ends: 1257 [2021-06-05 23:29:12,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 903.8ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:12,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-06-05 23:29:12,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1203. [2021-06-05 23:29:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 4.70216306156406) internal successors, (5652), 1202 states have internal predecessors, (5652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 5652 transitions. [2021-06-05 23:29:12,276 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 5652 transitions. Word has length 25 [2021-06-05 23:29:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:12,276 INFO L482 AbstractCegarLoop]: Abstraction has 1203 states and 5652 transitions. [2021-06-05 23:29:12,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 5652 transitions. [2021-06-05 23:29:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:12,278 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:12,278 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:12,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:12,478 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -945147981, now seen corresponding path program 76 times [2021-06-05 23:29:12,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:12,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144484391] [2021-06-05 23:29:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:12,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144484391] [2021-06-05 23:29:12,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144484391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:12,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665022400] [2021-06-05 23:29:12,614 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:12,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:12,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:12,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:29:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:12,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:12,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:12,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:12,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:12,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:12,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 23:29:12,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:12,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665022400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:12,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:12,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 23:29:12,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340922270] [2021-06-05 23:29:12,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:29:12,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:12,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:29:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:29:12,984 INFO L87 Difference]: Start difference. First operand 1203 states and 5652 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:13,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:13,274 INFO L93 Difference]: Finished difference Result 1400 states and 6258 transitions. [2021-06-05 23:29:13,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:29:13,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:13,277 INFO L225 Difference]: With dead ends: 1400 [2021-06-05 23:29:13,277 INFO L226 Difference]: Without dead ends: 1391 [2021-06-05 23:29:13,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-05 23:29:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1239. [2021-06-05 23:29:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.676090468497577) internal successors, (5789), 1238 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:13,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5789 transitions. [2021-06-05 23:29:13,294 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5789 transitions. Word has length 26 [2021-06-05 23:29:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:13,294 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5789 transitions. [2021-06-05 23:29:13,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:13,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5789 transitions. [2021-06-05 23:29:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:13,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:13,296 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:13,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:13,511 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:13,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1969861905, now seen corresponding path program 77 times [2021-06-05 23:29:13,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:13,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052658537] [2021-06-05 23:29:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:13,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052658537] [2021-06-05 23:29:13,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052658537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:13,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904809489] [2021-06-05 23:29:13,715 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:13,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:29:13,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:29:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:14,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904809489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:14,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:14,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:14,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819963509] [2021-06-05 23:29:14,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:14,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:14,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:14,323 INFO L87 Difference]: Start difference. First operand 1239 states and 5789 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:14,541 INFO L93 Difference]: Finished difference Result 1286 states and 5928 transitions. [2021-06-05 23:29:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:14,544 INFO L225 Difference]: With dead ends: 1286 [2021-06-05 23:29:14,544 INFO L226 Difference]: Without dead ends: 1278 [2021-06-05 23:29:14,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 695.8ms TimeCoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:29:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-06-05 23:29:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1246. [2021-06-05 23:29:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 4.674698795180723) internal successors, (5820), 1245 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 5820 transitions. [2021-06-05 23:29:14,560 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 5820 transitions. Word has length 26 [2021-06-05 23:29:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:14,560 INFO L482 AbstractCegarLoop]: Abstraction has 1246 states and 5820 transitions. [2021-06-05 23:29:14,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 5820 transitions. [2021-06-05 23:29:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:14,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:14,562 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:14,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:14,762 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:14,763 INFO L82 PathProgramCache]: Analyzing trace with hash -615589583, now seen corresponding path program 78 times [2021-06-05 23:29:14,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:14,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146468727] [2021-06-05 23:29:14,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:14,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:14,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146468727] [2021-06-05 23:29:14,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146468727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:14,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071466254] [2021-06-05 23:29:14,989 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:15,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:29:15,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:29:15,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:15,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:15,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:15,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:15,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:15,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:15,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:15,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-05 23:29:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:15,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071466254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:15,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:15,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:29:15,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787797879] [2021-06-05 23:29:15,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:29:15,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:15,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:29:15,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:29:15,425 INFO L87 Difference]: Start difference. First operand 1246 states and 5820 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:15,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:15,924 INFO L93 Difference]: Finished difference Result 1353 states and 6064 transitions. [2021-06-05 23:29:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:15,924 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:15,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:15,927 INFO L225 Difference]: With dead ends: 1353 [2021-06-05 23:29:15,927 INFO L226 Difference]: Without dead ends: 1341 [2021-06-05 23:29:15,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 781.9ms TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:15,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-06-05 23:29:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1247. [2021-06-05 23:29:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 4.657303370786517) internal successors, (5803), 1246 states have internal predecessors, (5803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 5803 transitions. [2021-06-05 23:29:15,945 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 5803 transitions. Word has length 26 [2021-06-05 23:29:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:15,945 INFO L482 AbstractCegarLoop]: Abstraction has 1247 states and 5803 transitions. [2021-06-05 23:29:15,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 5803 transitions. [2021-06-05 23:29:15,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:15,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:15,947 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:16,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:16,149 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:16,149 INFO L82 PathProgramCache]: Analyzing trace with hash 219339981, now seen corresponding path program 79 times [2021-06-05 23:29:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:16,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124255868] [2021-06-05 23:29:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:16,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124255868] [2021-06-05 23:29:16,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124255868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:16,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596657847] [2021-06-05 23:29:16,261 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:29:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:16,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:16,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:16,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:16,506 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:16,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:16,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:16,535 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 23:29:16,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 23:29:16,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596657847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:16,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:16,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 23:29:16,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650029481] [2021-06-05 23:29:16,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:29:16,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:16,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:29:16,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:29:16,630 INFO L87 Difference]: Start difference. First operand 1247 states and 5803 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:17,032 INFO L93 Difference]: Finished difference Result 2674 states and 11664 transitions. [2021-06-05 23:29:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:29:17,032 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:17,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:17,037 INFO L225 Difference]: With dead ends: 2674 [2021-06-05 23:29:17,037 INFO L226 Difference]: Without dead ends: 2633 [2021-06-05 23:29:17,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:29:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2021-06-05 23:29:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1458. [2021-06-05 23:29:17,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1458 states, 1457 states have (on average 4.881949210706932) internal successors, (7113), 1457 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1458 states to 1458 states and 7113 transitions. [2021-06-05 23:29:17,078 INFO L78 Accepts]: Start accepts. Automaton has 1458 states and 7113 transitions. Word has length 26 [2021-06-05 23:29:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:17,079 INFO L482 AbstractCegarLoop]: Abstraction has 1458 states and 7113 transitions. [2021-06-05 23:29:17,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1458 states and 7113 transitions. [2021-06-05 23:29:17,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:17,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:17,081 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:17,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 23:29:17,281 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash -805373943, now seen corresponding path program 80 times [2021-06-05 23:29:17,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:17,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222639307] [2021-06-05 23:29:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:17,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222639307] [2021-06-05 23:29:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222639307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:17,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551538241] [2021-06-05 23:29:17,492 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:17,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:17,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:17,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:18,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551538241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:18,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:18,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:18,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178313933] [2021-06-05 23:29:18,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:18,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:18,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:18,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:18,061 INFO L87 Difference]: Start difference. First operand 1458 states and 7113 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:18,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:18,627 INFO L93 Difference]: Finished difference Result 1507 states and 7259 transitions. [2021-06-05 23:29:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:29:18,627 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:18,630 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 23:29:18,630 INFO L226 Difference]: Without dead ends: 1499 [2021-06-05 23:29:18,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 939.2ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:29:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1499 states. [2021-06-05 23:29:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1499 to 1460. [2021-06-05 23:29:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 4.885538039753255) internal successors, (7128), 1459 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 7128 transitions. [2021-06-05 23:29:18,650 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 7128 transitions. Word has length 26 [2021-06-05 23:29:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:18,650 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 7128 transitions. [2021-06-05 23:29:18,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 7128 transitions. [2021-06-05 23:29:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:18,652 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:18,653 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:18,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 23:29:18,853 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:18,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:18,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1799650449, now seen corresponding path program 81 times [2021-06-05 23:29:18,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:18,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482804047] [2021-06-05 23:29:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:19,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:19,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482804047] [2021-06-05 23:29:19,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482804047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:19,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795814658] [2021-06-05 23:29:19,002 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:19,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:29:19,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:19,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:29:19,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795814658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:19,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:19,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:19,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497106208] [2021-06-05 23:29:19,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:19,729 INFO L87 Difference]: Start difference. First operand 1460 states and 7128 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:20,199 INFO L93 Difference]: Finished difference Result 1520 states and 7319 transitions. [2021-06-05 23:29:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:20,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:20,203 INFO L225 Difference]: With dead ends: 1520 [2021-06-05 23:29:20,203 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 23:29:20,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 934.0ms TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:29:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 23:29:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1465. [2021-06-05 23:29:20,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1465 states, 1464 states have (on average 4.8756830601092895) internal successors, (7138), 1464 states have internal predecessors, (7138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1465 states to 1465 states and 7138 transitions. [2021-06-05 23:29:20,228 INFO L78 Accepts]: Start accepts. Automaton has 1465 states and 7138 transitions. Word has length 26 [2021-06-05 23:29:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:20,228 INFO L482 AbstractCegarLoop]: Abstraction has 1465 states and 7138 transitions. [2021-06-05 23:29:20,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1465 states and 7138 transitions. [2021-06-05 23:29:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:20,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:20,231 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:20,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:20,434 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1153082439, now seen corresponding path program 82 times [2021-06-05 23:29:20,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:20,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516805412] [2021-06-05 23:29:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:20,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:20,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516805412] [2021-06-05 23:29:20,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516805412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:20,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014055118] [2021-06-05 23:29:20,522 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:20,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:20,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:29:20,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:20,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:20,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:20,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:20,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:20,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:20,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:20,793 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:95, output treesize:81 [2021-06-05 23:29:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:20,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014055118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:20,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:20,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:29:20,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025868841] [2021-06-05 23:29:20,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:29:20,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:20,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:29:20,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:29:20,884 INFO L87 Difference]: Start difference. First operand 1465 states and 7138 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23:29:25,108 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 23:29:29,233 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 23:29:35,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:35,376 INFO L93 Difference]: Finished difference Result 1793 states and 8258 transitions. [2021-06-05 23:29:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:29:35,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 26 [2021-06-05 23:29:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:35,380 INFO L225 Difference]: With dead ends: 1793 [2021-06-05 23:29:35,380 INFO L226 Difference]: Without dead ends: 1777 [2021-06-05 23:29:35,380 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 8594.8ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:35,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2021-06-05 23:29:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1513. [2021-06-05 23:29:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 4.866402116402116) internal successors, (7358), 1512 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 7358 transitions. [2021-06-05 23:29:35,401 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 7358 transitions. Word has length 26 [2021-06-05 23:29:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:35,402 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 7358 transitions. [2021-06-05 23:29:35,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 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 23:29:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 7358 transitions. [2021-06-05 23:29:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:35,404 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:35,404 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:35,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 23:29:35,605 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 532556407, now seen corresponding path program 83 times [2021-06-05 23:29:35,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:35,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943529166] [2021-06-05 23:29:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:35,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943529166] [2021-06-05 23:29:35,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943529166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:35,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256644923] [2021-06-05 23:29:35,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:35,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:29:35,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:35,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:29:35,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:36,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:36,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:36,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:36,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:36,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:36,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:36,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:36,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:36,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:36,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:36,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 23:29:36,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-05 23:29:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:36,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256644923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:36,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:36,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:29:36,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369851138] [2021-06-05 23:29:36,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:29:36,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:29:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:29:36,535 INFO L87 Difference]: Start difference. First operand 1513 states and 7358 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 23:29:36,886 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 107 [2021-06-05 23:29:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:36,915 INFO L93 Difference]: Finished difference Result 1848 states and 7788 transitions. [2021-06-05 23:29:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:29:36,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 26 [2021-06-05 23:29:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:36,919 INFO L225 Difference]: With dead ends: 1848 [2021-06-05 23:29:36,919 INFO L226 Difference]: Without dead ends: 1812 [2021-06-05 23:29:36,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 643.2ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:29:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2021-06-05 23:29:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1232. [2021-06-05 23:29:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.560519902518278) internal successors, (5614), 1231 states have internal predecessors, (5614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5614 transitions. [2021-06-05 23:29:36,938 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5614 transitions. Word has length 26 [2021-06-05 23:29:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:36,938 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5614 transitions. [2021-06-05 23:29:36,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 23:29:36,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5614 transitions. [2021-06-05 23:29:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:36,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:36,940 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:37,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:37,141 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -492157517, now seen corresponding path program 84 times [2021-06-05 23:29:37,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:37,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364256512] [2021-06-05 23:29:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:37,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:37,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364256512] [2021-06-05 23:29:37,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364256512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:37,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225086643] [2021-06-05 23:29:37,301 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:37,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:29:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:37,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225086643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:37,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:37,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:37,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026146978] [2021-06-05 23:29:37,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:37,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:37,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:37,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:37,794 INFO L87 Difference]: Start difference. First operand 1232 states and 5614 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:38,101 INFO L93 Difference]: Finished difference Result 1287 states and 5773 transitions. [2021-06-05 23:29:38,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:29:38,101 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:38,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:38,103 INFO L225 Difference]: With dead ends: 1287 [2021-06-05 23:29:38,103 INFO L226 Difference]: Without dead ends: 1279 [2021-06-05 23:29:38,104 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 640.8ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-06-05 23:29:38,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1242. [2021-06-05 23:29:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 4.556809024979855) internal successors, (5655), 1241 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 5655 transitions. [2021-06-05 23:29:38,119 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 5655 transitions. Word has length 26 [2021-06-05 23:29:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:38,119 INFO L482 AbstractCegarLoop]: Abstraction has 1242 states and 5655 transitions. [2021-06-05 23:29:38,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 5655 transitions. [2021-06-05 23:29:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:38,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:38,121 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:38,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 23:29:38,323 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:38,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1587344779, now seen corresponding path program 85 times [2021-06-05 23:29:38,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:38,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942733114] [2021-06-05 23:29:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:38,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:38,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942733114] [2021-06-05 23:29:38,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942733114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:38,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903340226] [2021-06-05 23:29:38,467 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:29:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:38,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:38,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:38,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:38,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:38,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:38,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:38,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 23:29:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:38,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903340226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:38,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:38,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 23:29:38,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284449933] [2021-06-05 23:29:38,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:29:38,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:38,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:29:38,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:29:38,844 INFO L87 Difference]: Start difference. First operand 1242 states and 5655 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:39,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:39,216 INFO L93 Difference]: Finished difference Result 1370 states and 6000 transitions. [2021-06-05 23:29:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:29:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:39,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:39,219 INFO L225 Difference]: With dead ends: 1370 [2021-06-05 23:29:39,219 INFO L226 Difference]: Without dead ends: 1358 [2021-06-05 23:29:39,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:29:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2021-06-05 23:29:39,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1255. [2021-06-05 23:29:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1255 states, 1254 states have (on average 4.54066985645933) internal successors, (5694), 1254 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1255 states to 1255 states and 5694 transitions. [2021-06-05 23:29:39,237 INFO L78 Accepts]: Start accepts. Automaton has 1255 states and 5694 transitions. Word has length 26 [2021-06-05 23:29:39,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:39,237 INFO L482 AbstractCegarLoop]: Abstraction has 1255 states and 5694 transitions. [2021-06-05 23:29:39,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1255 states and 5694 transitions. [2021-06-05 23:29:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:39,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:39,239 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:39,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:39,441 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2032815699, now seen corresponding path program 86 times [2021-06-05 23:29:39,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:39,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003739907] [2021-06-05 23:29:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:39,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:39,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003739907] [2021-06-05 23:29:39,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003739907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:39,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960858972] [2021-06-05 23:29:39,619 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:39,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:39,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:39,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:40,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960858972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:40,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:40,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:40,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104887859] [2021-06-05 23:29:40,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:40,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:40,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:40,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:40,175 INFO L87 Difference]: Start difference. First operand 1255 states and 5694 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 23:29:40,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:40,510 INFO L93 Difference]: Finished difference Result 1289 states and 5778 transitions. [2021-06-05 23:29:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:40,511 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 26 [2021-06-05 23:29:40,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:40,513 INFO L225 Difference]: With dead ends: 1289 [2021-06-05 23:29:40,513 INFO L226 Difference]: Without dead ends: 1277 [2021-06-05 23:29:40,513 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 721.0ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-05 23:29:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1252. [2021-06-05 23:29:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1251 states have (on average 4.545163868904876) internal successors, (5686), 1251 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 5686 transitions. [2021-06-05 23:29:40,529 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 5686 transitions. Word has length 26 [2021-06-05 23:29:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:40,529 INFO L482 AbstractCegarLoop]: Abstraction has 1252 states and 5686 transitions. [2021-06-05 23:29:40,529 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 23:29:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 5686 transitions. [2021-06-05 23:29:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:40,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:40,531 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:40,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 23:29:40,732 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:40,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:40,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1608504463, now seen corresponding path program 87 times [2021-06-05 23:29:40,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:40,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209938823] [2021-06-05 23:29:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:40,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:40,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209938823] [2021-06-05 23:29:40,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209938823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:40,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950991248] [2021-06-05 23:29:40,971 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:41,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:29:41,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:41,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:41,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950991248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:41,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:41,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:41,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286365641] [2021-06-05 23:29:41,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:41,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:41,656 INFO L87 Difference]: Start difference. First operand 1252 states and 5686 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 23:29:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:42,020 INFO L93 Difference]: Finished difference Result 1295 states and 5809 transitions. [2021-06-05 23:29:42,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:29:42,020 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 26 [2021-06-05 23:29:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:42,023 INFO L225 Difference]: With dead ends: 1295 [2021-06-05 23:29:42,023 INFO L226 Difference]: Without dead ends: 1287 [2021-06-05 23:29:42,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 876.1ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-06-05 23:29:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1254. [2021-06-05 23:29:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 4.5474860335195535) internal successors, (5698), 1253 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 5698 transitions. [2021-06-05 23:29:42,038 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 5698 transitions. Word has length 26 [2021-06-05 23:29:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:42,039 INFO L482 AbstractCegarLoop]: Abstraction has 1254 states and 5698 transitions. [2021-06-05 23:29:42,039 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 23:29:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 5698 transitions. [2021-06-05 23:29:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:42,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:42,041 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:42,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:42,241 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash 842661457, now seen corresponding path program 88 times [2021-06-05 23:29:42,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:42,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793183134] [2021-06-05 23:29:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:42,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793183134] [2021-06-05 23:29:42,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793183134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:42,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724630305] [2021-06-05 23:29:42,446 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:42,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:29:42,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:43,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724630305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:43,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:43,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:43,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779587460] [2021-06-05 23:29:43,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:43,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:43,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:43,080 INFO L87 Difference]: Start difference. First operand 1254 states and 5698 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:43,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:43,375 INFO L93 Difference]: Finished difference Result 1301 states and 5846 transitions. [2021-06-05 23:29:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:43,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:43,378 INFO L225 Difference]: With dead ends: 1301 [2021-06-05 23:29:43,378 INFO L226 Difference]: Without dead ends: 1296 [2021-06-05 23:29:43,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 811.9ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-06-05 23:29:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1250. [2021-06-05 23:29:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 4.551641313050441) internal successors, (5685), 1249 states have internal predecessors, (5685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 5685 transitions. [2021-06-05 23:29:43,393 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 5685 transitions. Word has length 26 [2021-06-05 23:29:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:43,394 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 5685 transitions. [2021-06-05 23:29:43,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 5685 transitions. [2021-06-05 23:29:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:43,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:43,395 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:43,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 23:29:43,596 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1059437065, now seen corresponding path program 89 times [2021-06-05 23:29:43,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:43,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147292958] [2021-06-05 23:29:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:43,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:43,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147292958] [2021-06-05 23:29:43,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147292958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:43,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795646014] [2021-06-05 23:29:43,850 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:43,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:29:43,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:43,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:29:43,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:44,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795646014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:44,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:44,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:44,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047642704] [2021-06-05 23:29:44,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:44,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:44,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:44,417 INFO L87 Difference]: Start difference. First operand 1250 states and 5685 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:44,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:44,730 INFO L93 Difference]: Finished difference Result 1389 states and 6092 transitions. [2021-06-05 23:29:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:29:44,730 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:44,733 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 23:29:44,733 INFO L226 Difference]: Without dead ends: 1381 [2021-06-05 23:29:44,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2021-06-05 23:29:44,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1243. [2021-06-05 23:29:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 4.563607085346216) internal successors, (5668), 1242 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:44,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 5668 transitions. [2021-06-05 23:29:44,749 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 5668 transitions. Word has length 26 [2021-06-05 23:29:44,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:44,749 INFO L482 AbstractCegarLoop]: Abstraction has 1243 states and 5668 transitions. [2021-06-05 23:29:44,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:44,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 5668 transitions. [2021-06-05 23:29:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:44,751 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:44,751 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:44,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 23:29:44,951 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:44,952 INFO L82 PathProgramCache]: Analyzing trace with hash 2140342969, now seen corresponding path program 90 times [2021-06-05 23:29:44,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:44,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314820790] [2021-06-05 23:29:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:45,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:45,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314820790] [2021-06-05 23:29:45,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314820790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:45,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252675387] [2021-06-05 23:29:45,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:45,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:29:45,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:45,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:29:45,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:45,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:45,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:45,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:45,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:45,646 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-06-05 23:29:45,646 INFO L628 ElimStorePlain]: treesize reduction 14, result has 92.6 percent of original size [2021-06-05 23:29:45,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:45,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:45,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:45,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:45,724 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.3 percent of original size [2021-06-05 23:29:45,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:45,726 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:203, output treesize:73 [2021-06-05 23:29:45,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:45,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252675387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:45,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:45,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:29:45,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999955445] [2021-06-05 23:29:45,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:29:45,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:45,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:29:45,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:29:45,831 INFO L87 Difference]: Start difference. First operand 1243 states and 5668 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:29:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:46,246 INFO L93 Difference]: Finished difference Result 1300 states and 5767 transitions. [2021-06-05 23:29:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:29:46,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 26 [2021-06-05 23:29:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:46,248 INFO L225 Difference]: With dead ends: 1300 [2021-06-05 23:29:46,249 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 23:29:46,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:29:46,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 23:29:46,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1239. [2021-06-05 23:29:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 4.554119547657512) internal successors, (5638), 1238 states have internal predecessors, (5638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 5638 transitions. [2021-06-05 23:29:46,264 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 5638 transitions. Word has length 26 [2021-06-05 23:29:46,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:46,264 INFO L482 AbstractCegarLoop]: Abstraction has 1239 states and 5638 transitions. [2021-06-05 23:29:46,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:29:46,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 5638 transitions. [2021-06-05 23:29:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:46,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:46,266 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:46,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:46,477 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:46,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:46,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1627082575, now seen corresponding path program 91 times [2021-06-05 23:29:46,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:46,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944318463] [2021-06-05 23:29:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:46,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944318463] [2021-06-05 23:29:46,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944318463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:46,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738504074] [2021-06-05 23:29:46,599 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:29:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:46,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:46,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:46,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:46,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:46,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:46,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:46,868 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 23:29:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:46,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738504074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:46,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:46,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 23:29:46,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234184968] [2021-06-05 23:29:46,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:29:46,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:46,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:29:46,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:29:46,959 INFO L87 Difference]: Start difference. First operand 1239 states and 5638 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:47,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:47,190 INFO L93 Difference]: Finished difference Result 1002 states and 4294 transitions. [2021-06-05 23:29:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:29:47,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:47,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:47,192 INFO L225 Difference]: With dead ends: 1002 [2021-06-05 23:29:47,192 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 23:29:47,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:29:47,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 23:29:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 974. [2021-06-05 23:29:47,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.34737923946557) internal successors, (4230), 973 states have internal predecessors, (4230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4230 transitions. [2021-06-05 23:29:47,204 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4230 transitions. Word has length 26 [2021-06-05 23:29:47,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:47,205 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4230 transitions. [2021-06-05 23:29:47,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4230 transitions. [2021-06-05 23:29:47,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:47,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:47,206 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:47,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:47,407 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1993077903, now seen corresponding path program 92 times [2021-06-05 23:29:47,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:47,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954333976] [2021-06-05 23:29:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:47,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:47,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954333976] [2021-06-05 23:29:47,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954333976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:47,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126384607] [2021-06-05 23:29:47,589 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:47,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:47,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:29:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:48,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126384607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:48,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:48,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:48,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885268330] [2021-06-05 23:29:48,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:48,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:48,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:48,256 INFO L87 Difference]: Start difference. First operand 974 states and 4230 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 23:29:48,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:48,894 INFO L93 Difference]: Finished difference Result 1025 states and 4377 transitions. [2021-06-05 23:29:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:29:48,895 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 26 [2021-06-05 23:29:48,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:48,896 INFO L225 Difference]: With dead ends: 1025 [2021-06-05 23:29:48,896 INFO L226 Difference]: Without dead ends: 1017 [2021-06-05 23:29:48,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1111.3ms TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:29:48,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-05 23:29:48,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 986. [2021-06-05 23:29:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 4.336040609137056) internal successors, (4271), 985 states have internal predecessors, (4271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 4271 transitions. [2021-06-05 23:29:48,908 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 4271 transitions. Word has length 26 [2021-06-05 23:29:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:48,909 INFO L482 AbstractCegarLoop]: Abstraction has 986 states and 4271 transitions. [2021-06-05 23:29:48,909 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 23:29:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 4271 transitions. [2021-06-05 23:29:48,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:48,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:48,910 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:49,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:49,110 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1724331475, now seen corresponding path program 93 times [2021-06-05 23:29:49,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:49,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001939515] [2021-06-05 23:29:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:49,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:49,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001939515] [2021-06-05 23:29:49,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001939515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:49,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848274766] [2021-06-05 23:29:49,354 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:49,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:29:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:29:49,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:49,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848274766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:49,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:49,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:49,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310361541] [2021-06-05 23:29:49,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:49,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:49,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:49,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:49,959 INFO L87 Difference]: Start difference. First operand 986 states and 4271 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 23:29:50,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:50,251 INFO L93 Difference]: Finished difference Result 1033 states and 4401 transitions. [2021-06-05 23:29:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:29:50,251 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 26 [2021-06-05 23:29:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:50,253 INFO L225 Difference]: With dead ends: 1033 [2021-06-05 23:29:50,253 INFO L226 Difference]: Without dead ends: 1025 [2021-06-05 23:29:50,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 817.6ms TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:50,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-06-05 23:29:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 975. [2021-06-05 23:29:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 4.354209445585216) internal successors, (4241), 974 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 4241 transitions. [2021-06-05 23:29:50,265 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 4241 transitions. Word has length 26 [2021-06-05 23:29:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:50,265 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 4241 transitions. [2021-06-05 23:29:50,265 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 23:29:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 4241 transitions. [2021-06-05 23:29:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:50,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:50,267 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:50,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 23:29:50,467 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1300020239, now seen corresponding path program 94 times [2021-06-05 23:29:50,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:50,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553075877] [2021-06-05 23:29:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:50,667 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:50,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:50,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553075877] [2021-06-05 23:29:50,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553075877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:50,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596959126] [2021-06-05 23:29:50,667 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:50,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:29:50,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:50,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:29:50,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:51,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596959126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:51,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:51,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:51,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788957779] [2021-06-05 23:29:51,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:51,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:51,357 INFO L87 Difference]: Start difference. First operand 975 states and 4241 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 23:29:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:51,694 INFO L93 Difference]: Finished difference Result 1021 states and 4369 transitions. [2021-06-05 23:29:51,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:51,694 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 26 [2021-06-05 23:29:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:51,696 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 23:29:51,696 INFO L226 Difference]: Without dead ends: 1013 [2021-06-05 23:29:51,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 825.9ms TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:29:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-05 23:29:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 974. [2021-06-05 23:29:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 973 states have (on average 4.362795477903392) internal successors, (4245), 973 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 4245 transitions. [2021-06-05 23:29:51,708 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 4245 transitions. Word has length 26 [2021-06-05 23:29:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:51,708 INFO L482 AbstractCegarLoop]: Abstraction has 974 states and 4245 transitions. [2021-06-05 23:29:51,708 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 23:29:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 4245 transitions. [2021-06-05 23:29:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:51,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:51,710 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:51,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 23:29:51,910 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:51,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1350944785, now seen corresponding path program 95 times [2021-06-05 23:29:51,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:51,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645576239] [2021-06-05 23:29:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:52,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:52,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645576239] [2021-06-05 23:29:52,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645576239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:52,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364804668] [2021-06-05 23:29:52,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:52,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:29:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:29:52,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:52,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:52,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:52,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:52,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:52,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:52,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:29:52,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:119, output treesize:105 [2021-06-05 23:29:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:52,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364804668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:52,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:52,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:29:52,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469163354] [2021-06-05 23:29:52,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:29:52,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:52,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:29:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:29:52,743 INFO L87 Difference]: Start difference. First operand 974 states and 4245 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:29:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:52,846 INFO L93 Difference]: Finished difference Result 995 states and 4253 transitions. [2021-06-05 23:29:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:29:52,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 26 [2021-06-05 23:29:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:52,848 INFO L225 Difference]: With dead ends: 995 [2021-06-05 23:29:52,848 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 23:29:52,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 533.3ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:29:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 23:29:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 963. [2021-06-05 23:29:52,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 4.353430353430354) internal successors, (4188), 962 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 4188 transitions. [2021-06-05 23:29:52,871 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 4188 transitions. Word has length 26 [2021-06-05 23:29:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:52,871 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 4188 transitions. [2021-06-05 23:29:52,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:29:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 4188 transitions. [2021-06-05 23:29:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:52,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:52,872 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:53,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 23:29:53,073 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:53,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1919308587, now seen corresponding path program 96 times [2021-06-05 23:29:53,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:53,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473360814] [2021-06-05 23:29:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:53,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:53,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473360814] [2021-06-05 23:29:53,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473360814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:53,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91445564] [2021-06-05 23:29:53,231 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:53,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:29:53,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:53,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:29:53,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:53,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91445564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:53,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:53,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:53,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933129832] [2021-06-05 23:29:53,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:53,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:53,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:53,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:53,773 INFO L87 Difference]: Start difference. First operand 963 states and 4188 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:54,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:54,031 INFO L93 Difference]: Finished difference Result 1008 states and 4333 transitions. [2021-06-05 23:29:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:29:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:54,033 INFO L225 Difference]: With dead ends: 1008 [2021-06-05 23:29:54,033 INFO L226 Difference]: Without dead ends: 1003 [2021-06-05 23:29:54,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 642.8ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:29:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-06-05 23:29:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 965. [2021-06-05 23:29:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 4.348547717842323) internal successors, (4192), 964 states have internal predecessors, (4192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 4192 transitions. [2021-06-05 23:29:54,044 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 4192 transitions. Word has length 26 [2021-06-05 23:29:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:54,045 INFO L482 AbstractCegarLoop]: Abstraction has 965 states and 4192 transitions. [2021-06-05 23:29:54,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 4192 transitions. [2021-06-05 23:29:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:54,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:54,046 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:54,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 23:29:54,247 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:54,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1211170747, now seen corresponding path program 97 times [2021-06-05 23:29:54,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:54,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575714529] [2021-06-05 23:29:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:54,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:54,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575714529] [2021-06-05 23:29:54,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575714529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:54,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812497340] [2021-06-05 23:29:54,504 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:54,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:29:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:29:55,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812497340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:55,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:29:55,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:29:55,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694612852] [2021-06-05 23:29:55,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:29:55,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:29:55,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:29:55,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:29:55,122 INFO L87 Difference]: Start difference. First operand 965 states and 4192 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:29:55,720 INFO L93 Difference]: Finished difference Result 1251 states and 5174 transitions. [2021-06-05 23:29:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:29:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:29:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:29:55,722 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 23:29:55,723 INFO L226 Difference]: Without dead ends: 1222 [2021-06-05 23:29:55,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:29:55,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-06-05 23:29:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1036. [2021-06-05 23:29:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 4.33719806763285) internal successors, (4489), 1035 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 4489 transitions. [2021-06-05 23:29:55,736 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 4489 transitions. Word has length 26 [2021-06-05 23:29:55,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:29:55,736 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 4489 transitions. [2021-06-05 23:29:55,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:29:55,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 4489 transitions. [2021-06-05 23:29:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:29:55,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:29:55,738 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:29:55,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 23:29:55,940 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:29:55,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:29:55,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1876399727, now seen corresponding path program 98 times [2021-06-05 23:29:55,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:29:55,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127004189] [2021-06-05 23:29:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:29:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:29:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:29:56,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:29:56,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127004189] [2021-06-05 23:29:56,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127004189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:29:56,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716659859] [2021-06-05 23:29:56,101 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:29:56,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:29:56,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:29:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:29:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:29:56,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:56,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:56,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:56,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:56,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:56,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:56,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:29:56,715 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:29:56,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:29:56,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 23:29:56,799 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-05 23:31:01,638 WARN L205 SmtUtils]: Spent 1.08 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 23:31:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:31:01,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716659859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:01,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:31:01,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:31:01,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206829041] [2021-06-05 23:31:01,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:31:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:31:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:31:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:31:01,762 INFO L87 Difference]: Start difference. First operand 1036 states and 4489 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:31:59,270 WARN L205 SmtUtils]: Spent 57.12 s on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2021-06-05 23:31:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:31:59,323 INFO L93 Difference]: Finished difference Result 1372 states and 5445 transitions. [2021-06-05 23:31:59,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:31:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 26 [2021-06-05 23:31:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:31:59,326 INFO L225 Difference]: With dead ends: 1372 [2021-06-05 23:31:59,326 INFO L226 Difference]: Without dead ends: 1354 [2021-06-05 23:31:59,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 122628.9ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:31:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-06-05 23:31:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 968. [2021-06-05 23:31:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 967 states have (on average 4.269906928645295) internal successors, (4129), 967 states have internal predecessors, (4129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:31:59,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 4129 transitions. [2021-06-05 23:31:59,339 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 4129 transitions. Word has length 26 [2021-06-05 23:31:59,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:31:59,339 INFO L482 AbstractCegarLoop]: Abstraction has 968 states and 4129 transitions. [2021-06-05 23:31:59,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:31:59,339 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 4129 transitions. [2021-06-05 23:31:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:31:59,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:31:59,352 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:31:59,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 23:31:59,553 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:31:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:31:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1393853645, now seen corresponding path program 99 times [2021-06-05 23:31:59,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:31:59,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881154360] [2021-06-05 23:31:59,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:31:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:31:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:31:59,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:31:59,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881154360] [2021-06-05 23:31:59,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881154360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:31:59,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449042118] [2021-06-05 23:31:59,748 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:31:59,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:31:59,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:31:59,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:31:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:00,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449042118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:00,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:00,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:32:00,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508923465] [2021-06-05 23:32:00,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:32:00,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:00,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:32:00,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:32:00,367 INFO L87 Difference]: Start difference. First operand 968 states and 4129 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:00,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:00,688 INFO L93 Difference]: Finished difference Result 1031 states and 4316 transitions. [2021-06-05 23:32:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:32:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:32:00,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:00,690 INFO L225 Difference]: With dead ends: 1031 [2021-06-05 23:32:00,690 INFO L226 Difference]: Without dead ends: 1023 [2021-06-05 23:32:00,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:32:00,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-06-05 23:32:00,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 981. [2021-06-05 23:32:00,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 4.259183673469388) internal successors, (4174), 980 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 4174 transitions. [2021-06-05 23:32:00,702 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 4174 transitions. Word has length 26 [2021-06-05 23:32:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:00,702 INFO L482 AbstractCegarLoop]: Abstraction has 981 states and 4174 transitions. [2021-06-05 23:32:00,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 4174 transitions. [2021-06-05 23:32:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:32:00,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:00,704 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:32:00,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-06-05 23:32:00,904 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:00,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1558879243, now seen corresponding path program 100 times [2021-06-05 23:32:00,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:00,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790476163] [2021-06-05 23:32:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:01,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:01,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790476163] [2021-06-05 23:32:01,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790476163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:01,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341616922] [2021-06-05 23:32:01,054 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:01,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:32:01,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:01,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:32:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:01,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:01,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:01,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:01,328 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:01,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:01,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:32:01,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:105, output treesize:91 [2021-06-05 23:32:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:01,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341616922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:01,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:01,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-06-05 23:32:01,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370636593] [2021-06-05 23:32:01,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:32:01,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:32:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:32:01,474 INFO L87 Difference]: Start difference. First operand 981 states and 4174 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:32:05,797 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2021-06-05 23:32:10,281 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-06-05 23:32:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:14,340 INFO L93 Difference]: Finished difference Result 1006 states and 4214 transitions. [2021-06-05 23:32:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:32:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 26 [2021-06-05 23:32:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:14,342 INFO L225 Difference]: With dead ends: 1006 [2021-06-05 23:32:14,342 INFO L226 Difference]: Without dead ends: 998 [2021-06-05 23:32:14,342 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 8685.9ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:32:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2021-06-05 23:32:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 972. [2021-06-05 23:32:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 4.25643666323378) internal successors, (4133), 971 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 4133 transitions. [2021-06-05 23:32:14,377 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 4133 transitions. Word has length 26 [2021-06-05 23:32:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:14,377 INFO L482 AbstractCegarLoop]: Abstraction has 972 states and 4133 transitions. [2021-06-05 23:32:14,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:32:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 4133 transitions. [2021-06-05 23:32:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:32:14,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:14,379 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:32:14,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 23:32:14,579 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1004144201, now seen corresponding path program 101 times [2021-06-05 23:32:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:14,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535007090] [2021-06-05 23:32:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:14,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:14,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535007090] [2021-06-05 23:32:14,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535007090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:14,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944453638] [2021-06-05 23:32:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:14,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:32:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:32:14,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:15,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944453638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:15,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:15,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:32:15,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345434082] [2021-06-05 23:32:15,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:32:15,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:32:15,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:32:15,249 INFO L87 Difference]: Start difference. First operand 972 states and 4133 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:15,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:15,481 INFO L93 Difference]: Finished difference Result 1074 states and 4467 transitions. [2021-06-05 23:32:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:32:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:32:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:15,483 INFO L225 Difference]: With dead ends: 1074 [2021-06-05 23:32:15,483 INFO L226 Difference]: Without dead ends: 1064 [2021-06-05 23:32:15,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:32:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-05 23:32:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 998. [2021-06-05 23:32:15,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 4.235707121364093) internal successors, (4223), 997 states have internal predecessors, (4223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 4223 transitions. [2021-06-05 23:32:15,495 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 4223 transitions. Word has length 26 [2021-06-05 23:32:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:15,495 INFO L482 AbstractCegarLoop]: Abstraction has 998 states and 4223 transitions. [2021-06-05 23:32:15,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 4223 transitions. [2021-06-05 23:32:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:32:15,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:15,496 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:32:15,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:15,718 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:15,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1300083919, now seen corresponding path program 102 times [2021-06-05 23:32:15,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:15,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187564996] [2021-06-05 23:32:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:15,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:15,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187564996] [2021-06-05 23:32:15,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187564996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:15,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335030752] [2021-06-05 23:32:15,846 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:15,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:32:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:32:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:16,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:16,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:16,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:16,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:16,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:16,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:32:16,362 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:99, output treesize:85 [2021-06-05 23:32:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:16,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335030752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:16,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:16,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-06-05 23:32:16,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817615500] [2021-06-05 23:32:16,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:32:16,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:32:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:32:16,447 INFO L87 Difference]: Start difference. First operand 998 states and 4223 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:32:16,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:16,719 INFO L93 Difference]: Finished difference Result 1103 states and 4427 transitions. [2021-06-05 23:32:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:32:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 26 [2021-06-05 23:32:16,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:16,721 INFO L225 Difference]: With dead ends: 1103 [2021-06-05 23:32:16,721 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 23:32:16,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:32:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 23:32:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 1004. [2021-06-05 23:32:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-06-05 23:32:16,733 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-06-05 23:32:16,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:16,733 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-06-05 23:32:16,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 23:32:16,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-06-05 23:32:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:32:16,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:16,734 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:32:16,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:16,935 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash -897954321, now seen corresponding path program 103 times [2021-06-05 23:32:16,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:16,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370287695] [2021-06-05 23:32:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:17,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370287695] [2021-06-05 23:32:17,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370287695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:17,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792184755] [2021-06-05 23:32:17,108 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:32:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:32:17,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792184755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:17,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:32:17,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:32:17,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197084141] [2021-06-05 23:32:17,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:32:17,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:32:17,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:32:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:32:17,663 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:32:17,895 INFO L93 Difference]: Finished difference Result 1059 states and 4372 transitions. [2021-06-05 23:32:17,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:32:17,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:32:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:32:17,897 INFO L225 Difference]: With dead ends: 1059 [2021-06-05 23:32:17,897 INFO L226 Difference]: Without dead ends: 1051 [2021-06-05 23:32:17,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 619.1ms TimeCoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:32:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-06-05 23:32:17,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1004. [2021-06-05 23:32:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.200398803589232) internal successors, (4213), 1003 states have internal predecessors, (4213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4213 transitions. [2021-06-05 23:32:17,909 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4213 transitions. Word has length 26 [2021-06-05 23:32:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:32:17,909 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4213 transitions. [2021-06-05 23:32:17,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:32:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4213 transitions. [2021-06-05 23:32:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:32:17,910 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:32:17,910 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:32:18,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 23:32:18,111 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:32:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:32:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1993141583, now seen corresponding path program 104 times [2021-06-05 23:32:18,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:32:18,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119087601] [2021-06-05 23:32:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:32:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:32:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:32:18,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:32:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119087601] [2021-06-05 23:32:18,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119087601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:32:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413247106] [2021-06-05 23:32:18,205 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:32:18,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:32:18,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:32:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:32:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:32:18,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:18,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:18,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:18,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:18,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:18,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:18,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:18,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:32:18,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:32:18,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:32:18,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 8 dim-0 vars, and 4 xjuncts. [2021-06-05 23:32:18,802 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:251, output treesize:223 [2021-06-05 23:33:24,609 WARN L205 SmtUtils]: Spent 1.10 m on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 23:33:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:33:24,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413247106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:33:24,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:33:24,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 23:33:24,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467420108] [2021-06-05 23:33:24,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:33:24,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:33:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:33:24,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:33:24,699 INFO L87 Difference]: Start difference. First operand 1004 states and 4213 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:53,801 WARN L205 SmtUtils]: Spent 1.48 m on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-05 23:34:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:53,913 INFO L93 Difference]: Finished difference Result 1021 states and 4224 transitions. [2021-06-05 23:34:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:34:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:34:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:53,916 INFO L225 Difference]: With dead ends: 1021 [2021-06-05 23:34:53,916 INFO L226 Difference]: Without dead ends: 1013 [2021-06-05 23:34:53,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 155150.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:34:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-06-05 23:34:53,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 989. [2021-06-05 23:34:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 988 states have (on average 4.202429149797571) internal successors, (4152), 988 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 4152 transitions. [2021-06-05 23:34:53,927 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 4152 transitions. Word has length 26 [2021-06-05 23:34:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:53,927 INFO L482 AbstractCegarLoop]: Abstraction has 989 states and 4152 transitions. [2021-06-05 23:34:53,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 4152 transitions. [2021-06-05 23:34:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:34:53,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:53,928 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:54,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:54,130 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:54,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1627018895, now seen corresponding path program 105 times [2021-06-05 23:34:54,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:54,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204415302] [2021-06-05 23:34:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:54,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204415302] [2021-06-05 23:34:54,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204415302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917575098] [2021-06-05 23:34:54,290 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:54,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:34:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:54,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:34:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:54,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917575098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:54,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:54,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:34:54,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019682313] [2021-06-05 23:34:54,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:34:54,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:54,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:34:54,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:34:54,839 INFO L87 Difference]: Start difference. First operand 989 states and 4152 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 23:34:55,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:55,197 INFO L93 Difference]: Finished difference Result 1036 states and 4291 transitions. [2021-06-05 23:34:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:34:55,198 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 26 [2021-06-05 23:34:55,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:55,199 INFO L225 Difference]: With dead ends: 1036 [2021-06-05 23:34:55,199 INFO L226 Difference]: Without dead ends: 1028 [2021-06-05 23:34:55,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 731.9ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:34:55,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-06-05 23:34:55,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 985. [2021-06-05 23:34:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 4.211382113821138) internal successors, (4144), 984 states have internal predecessors, (4144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 4144 transitions. [2021-06-05 23:34:55,212 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 4144 transitions. Word has length 26 [2021-06-05 23:34:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:55,212 INFO L482 AbstractCegarLoop]: Abstraction has 985 states and 4144 transitions. [2021-06-05 23:34:55,212 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 23:34:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 4144 transitions. [2021-06-05 23:34:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:34:55,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:55,213 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:55,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-05 23:34:55,414 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:55,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1202707659, now seen corresponding path program 106 times [2021-06-05 23:34:55,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:55,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777533027] [2021-06-05 23:34:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:55,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:55,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777533027] [2021-06-05 23:34:55,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777533027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:55,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299012199] [2021-06-05 23:34:55,607 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:55,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:34:55,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:34:55,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:56,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299012199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:56,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:56,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:34:56,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866669710] [2021-06-05 23:34:56,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:34:56,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:56,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:34:56,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:34:56,279 INFO L87 Difference]: Start difference. First operand 985 states and 4144 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 23:34:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:56,670 INFO L93 Difference]: Finished difference Result 1044 states and 4311 transitions. [2021-06-05 23:34:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:34:56,670 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 26 [2021-06-05 23:34:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:56,672 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 23:34:56,672 INFO L226 Difference]: Without dead ends: 1036 [2021-06-05 23:34:56,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 919.2ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:34:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-05 23:34:56,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 983. [2021-06-05 23:34:56,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 982 states have (on average 4.214867617107943) internal successors, (4139), 982 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:56,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 4139 transitions. [2021-06-05 23:34:56,683 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 4139 transitions. Word has length 26 [2021-06-05 23:34:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:56,683 INFO L482 AbstractCegarLoop]: Abstraction has 983 states and 4139 transitions. [2021-06-05 23:34:56,683 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 23:34:56,683 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 4139 transitions. [2021-06-05 23:34:56,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:34:56,685 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:56,685 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:56,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:56,885 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1918224333, now seen corresponding path program 107 times [2021-06-05 23:34:56,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:56,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916156839] [2021-06-05 23:34:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:56,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:56,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916156839] [2021-06-05 23:34:56,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916156839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:56,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552746777] [2021-06-05 23:34:56,967 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:57,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:34:57,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:57,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:34:57,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:34:57,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:57,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:34:57,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:34:57,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:34:57,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:34:57,435 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:129, output treesize:115 [2021-06-05 23:34:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:34:57,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552746777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:57,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:57,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 23:34:57,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346298533] [2021-06-05 23:34:57,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 23:34:57,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 23:34:57,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 23:34:57,583 INFO L87 Difference]: Start difference. First operand 983 states and 4139 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 23:34:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:57,800 INFO L93 Difference]: Finished difference Result 949 states and 3881 transitions. [2021-06-05 23:34:57,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:34:57,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 26 [2021-06-05 23:34:57,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:57,802 INFO L225 Difference]: With dead ends: 949 [2021-06-05 23:34:57,802 INFO L226 Difference]: Without dead ends: 939 [2021-06-05 23:34:57,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 459.5ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:34:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-05 23:34:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 911. [2021-06-05 23:34:57,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 4.175824175824176) internal successors, (3800), 910 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:57,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 3800 transitions. [2021-06-05 23:34:57,813 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 3800 transitions. Word has length 26 [2021-06-05 23:34:57,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:57,813 INFO L482 AbstractCegarLoop]: Abstraction has 911 states and 3800 transitions. [2021-06-05 23:34:57,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 23:34:57,813 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 3800 transitions. [2021-06-05 23:34:57,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:34:57,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:57,814 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:58,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 23:34:58,015 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:58,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:58,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1352029039, now seen corresponding path program 108 times [2021-06-05 23:34:58,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:58,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907687595] [2021-06-05 23:34:58,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:58,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:58,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907687595] [2021-06-05 23:34:58,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907687595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:58,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349577030] [2021-06-05 23:34:58,257 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:58,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:34:58,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:34:58,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:34:58,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:34:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:58,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349577030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:58,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:34:58,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:34:58,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621734199] [2021-06-05 23:34:58,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:34:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:34:58,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:34:58,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:34:58,899 INFO L87 Difference]: Start difference. First operand 911 states and 3800 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:59,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:34:59,205 INFO L93 Difference]: Finished difference Result 985 states and 4052 transitions. [2021-06-05 23:34:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:34:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:34:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:34:59,207 INFO L225 Difference]: With dead ends: 985 [2021-06-05 23:34:59,207 INFO L226 Difference]: Without dead ends: 975 [2021-06-05 23:34:59,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:34:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-06-05 23:34:59,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 915. [2021-06-05 23:34:59,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 4.168490153172867) internal successors, (3810), 914 states have internal predecessors, (3810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 3810 transitions. [2021-06-05 23:34:59,218 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 3810 transitions. Word has length 26 [2021-06-05 23:34:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:34:59,218 INFO L482 AbstractCegarLoop]: Abstraction has 915 states and 3810 transitions. [2021-06-05 23:34:59,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:34:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 3810 transitions. [2021-06-05 23:34:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:34:59,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:34:59,219 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:34:59,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable501,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:59,420 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:34:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:34:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1778450295, now seen corresponding path program 109 times [2021-06-05 23:34:59,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:34:59,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205926495] [2021-06-05 23:34:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:34:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:34:59,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:34:59,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205926495] [2021-06-05 23:34:59,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205926495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:34:59,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266501240] [2021-06-05 23:34:59,614 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:34:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:34:59,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:34:59,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:00,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266501240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:00,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:00,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:35:00,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231081723] [2021-06-05 23:35:00,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:35:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:00,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:35:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:35:00,259 INFO L87 Difference]: Start difference. First operand 915 states and 3810 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:00,698 INFO L93 Difference]: Finished difference Result 958 states and 3949 transitions. [2021-06-05 23:35:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:35:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:35:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:00,699 INFO L225 Difference]: With dead ends: 958 [2021-06-05 23:35:00,700 INFO L226 Difference]: Without dead ends: 953 [2021-06-05 23:35:00,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 887.1ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-06-05 23:35:00,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 907. [2021-06-05 23:35:00,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 4.181015452538631) internal successors, (3788), 906 states have internal predecessors, (3788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3788 transitions. [2021-06-05 23:35:00,710 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3788 transitions. Word has length 26 [2021-06-05 23:35:00,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:00,710 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 3788 transitions. [2021-06-05 23:35:00,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:00,710 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3788 transitions. [2021-06-05 23:35:00,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 23:35:00,711 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:00,711 INFO L554 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:00,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:00,912 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:00,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash 826574097, now seen corresponding path program 110 times [2021-06-05 23:35:00,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:00,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643058563] [2021-06-05 23:35:00,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:01,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:01,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643058563] [2021-06-05 23:35:01,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643058563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:01,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771029614] [2021-06-05 23:35:01,095 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:01,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:01,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:01,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:01,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:01,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771029614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:01,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:01,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:35:01,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846908981] [2021-06-05 23:35:01,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:35:01,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:01,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:35:01,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:35:01,693 INFO L87 Difference]: Start difference. First operand 907 states and 3788 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:02,112 INFO L93 Difference]: Finished difference Result 954 states and 3919 transitions. [2021-06-05 23:35:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:35:02,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 23:35:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:02,114 INFO L225 Difference]: With dead ends: 954 [2021-06-05 23:35:02,115 INFO L226 Difference]: Without dead ends: 946 [2021-06-05 23:35:02,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 835.4ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-06-05 23:35:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 895. [2021-06-05 23:35:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 4.196868008948546) internal successors, (3752), 894 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3752 transitions. [2021-06-05 23:35:02,126 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3752 transitions. Word has length 26 [2021-06-05 23:35:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:02,126 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3752 transitions. [2021-06-05 23:35:02,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3752 transitions. [2021-06-05 23:35:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:02,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:02,127 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:02,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 23:35:02,328 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:02,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:02,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1463466562, now seen corresponding path program 111 times [2021-06-05 23:35:02,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:02,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816712860] [2021-06-05 23:35:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:02,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:02,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816712860] [2021-06-05 23:35:02,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816712860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:02,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393057412] [2021-06-05 23:35:02,515 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:02,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:35:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:02,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:03,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393057412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:03,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:03,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:03,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353616887] [2021-06-05 23:35:03,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:03,244 INFO L87 Difference]: Start difference. First operand 895 states and 3752 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:03,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:03,526 INFO L93 Difference]: Finished difference Result 925 states and 3819 transitions. [2021-06-05 23:35:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:35:03,526 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:03,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:03,527 INFO L225 Difference]: With dead ends: 925 [2021-06-05 23:35:03,527 INFO L226 Difference]: Without dead ends: 909 [2021-06-05 23:35:03,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 870.0ms TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:03,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2021-06-05 23:35:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 897. [2021-06-05 23:35:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.180803571428571) internal successors, (3746), 896 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:03,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3746 transitions. [2021-06-05 23:35:03,538 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3746 transitions. Word has length 27 [2021-06-05 23:35:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:03,538 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3746 transitions. [2021-06-05 23:35:03,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3746 transitions. [2021-06-05 23:35:03,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:03,539 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:03,540 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:03,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:03,740 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:03,741 INFO L82 PathProgramCache]: Analyzing trace with hash 275921892, now seen corresponding path program 112 times [2021-06-05 23:35:03,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:03,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937620405] [2021-06-05 23:35:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:03,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937620405] [2021-06-05 23:35:03,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937620405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:03,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247540223] [2021-06-05 23:35:03,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:03,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:03,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:03,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:03,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:04,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247540223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:04,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:04,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:04,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67875657] [2021-06-05 23:35:04,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:04,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:04,575 INFO L87 Difference]: Start difference. First operand 897 states and 3746 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:05,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:05,114 INFO L93 Difference]: Finished difference Result 922 states and 3798 transitions. [2021-06-05 23:35:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:35:05,114 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:05,116 INFO L225 Difference]: With dead ends: 922 [2021-06-05 23:35:05,116 INFO L226 Difference]: Without dead ends: 908 [2021-06-05 23:35:05,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 982.1ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:35:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-05 23:35:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 891. [2021-06-05 23:35:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 4.180898876404495) internal successors, (3721), 890 states have internal predecessors, (3721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3721 transitions. [2021-06-05 23:35:05,127 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3721 transitions. Word has length 27 [2021-06-05 23:35:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:05,127 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3721 transitions. [2021-06-05 23:35:05,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3721 transitions. [2021-06-05 23:35:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:05,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:05,129 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:05,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 23:35:05,337 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -572700580, now seen corresponding path program 113 times [2021-06-05 23:35:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:05,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827294201] [2021-06-05 23:35:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:05,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:05,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827294201] [2021-06-05 23:35:05,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827294201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:05,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148298669] [2021-06-05 23:35:05,682 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:05,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:35:05,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:05,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148298669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:06,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:06,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:06,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540618058] [2021-06-05 23:35:06,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:06,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:06,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:06,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:06,549 INFO L87 Difference]: Start difference. First operand 891 states and 3721 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:06,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:06,866 INFO L93 Difference]: Finished difference Result 933 states and 3816 transitions. [2021-06-05 23:35:06,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:35:06,866 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:06,868 INFO L225 Difference]: With dead ends: 933 [2021-06-05 23:35:06,868 INFO L226 Difference]: Without dead ends: 913 [2021-06-05 23:35:06,868 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1030.3ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:06,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-06-05 23:35:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 888. [2021-06-05 23:35:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 4.174746335963923) internal successors, (3703), 887 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3703 transitions. [2021-06-05 23:35:06,879 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3703 transitions. Word has length 27 [2021-06-05 23:35:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:06,879 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3703 transitions. [2021-06-05 23:35:06,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3703 transitions. [2021-06-05 23:35:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:06,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:06,881 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:07,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:07,081 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1255922468, now seen corresponding path program 114 times [2021-06-05 23:35:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:07,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163461380] [2021-06-05 23:35:07,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:07,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:07,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163461380] [2021-06-05 23:35:07,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163461380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:07,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458190052] [2021-06-05 23:35:07,218 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:07,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:35:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:35:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:07,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:07,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:07,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:07,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:07,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:07,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:07,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:35:07,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:50, output treesize:36 [2021-06-05 23:35:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:07,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458190052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:07,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:07,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2021-06-05 23:35:07,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801641054] [2021-06-05 23:35:07,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:35:07,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:07,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:35:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:35:07,737 INFO L87 Difference]: Start difference. First operand 888 states and 3703 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:08,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:08,045 INFO L93 Difference]: Finished difference Result 1936 states and 7355 transitions. [2021-06-05 23:35:08,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:35:08,045 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:08,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:08,048 INFO L225 Difference]: With dead ends: 1936 [2021-06-05 23:35:08,048 INFO L226 Difference]: Without dead ends: 1912 [2021-06-05 23:35:08,049 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:35:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-06-05 23:35:08,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 960. [2021-06-05 23:35:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 4.211678832116788) internal successors, (4039), 959 states have internal predecessors, (4039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 4039 transitions. [2021-06-05 23:35:08,066 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 4039 transitions. Word has length 27 [2021-06-05 23:35:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:08,066 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 4039 transitions. [2021-06-05 23:35:08,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 4039 transitions. [2021-06-05 23:35:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:08,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:08,067 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:08,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:08,268 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:08,268 INFO L82 PathProgramCache]: Analyzing trace with hash 231208544, now seen corresponding path program 115 times [2021-06-05 23:35:08,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:08,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161217295] [2021-06-05 23:35:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:08,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:08,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161217295] [2021-06-05 23:35:08,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161217295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:08,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035516248] [2021-06-05 23:35:08,457 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:08,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035516248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:08,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:08,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:08,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034983252] [2021-06-05 23:35:08,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:08,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:08,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:08,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:08,988 INFO L87 Difference]: Start difference. First operand 960 states and 4039 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:09,390 INFO L93 Difference]: Finished difference Result 989 states and 4112 transitions. [2021-06-05 23:35:09,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:35:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:09,392 INFO L225 Difference]: With dead ends: 989 [2021-06-05 23:35:09,393 INFO L226 Difference]: Without dead ends: 982 [2021-06-05 23:35:09,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 755.1ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-05 23:35:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 964. [2021-06-05 23:35:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 4.19730010384216) internal successors, (4042), 963 states have internal predecessors, (4042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 4042 transitions. [2021-06-05 23:35:09,405 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 4042 transitions. Word has length 27 [2021-06-05 23:35:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:09,405 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 4042 transitions. [2021-06-05 23:35:09,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 4042 transitions. [2021-06-05 23:35:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:09,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:09,407 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:09,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 23:35:09,607 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:09,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1019543526, now seen corresponding path program 116 times [2021-06-05 23:35:09,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:09,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052981790] [2021-06-05 23:35:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:09,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:09,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052981790] [2021-06-05 23:35:09,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052981790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:09,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052227400] [2021-06-05 23:35:09,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:09,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:09,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:09,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:35:09,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:10,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:10,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:10,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:10,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:10,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:10,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:10,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:10,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:10,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:10,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:10,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:10,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 3 dim-1 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2021-06-05 23:35:10,278 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 11 variables, input treesize:121, output treesize:93 [2021-06-05 23:35:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:10,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052227400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:10,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:10,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 23:35:10,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660694333] [2021-06-05 23:35:10,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:35:10,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:35:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:35:10,389 INFO L87 Difference]: Start difference. First operand 964 states and 4042 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:35:13,166 WARN L205 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2021-06-05 23:35:13,650 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-05 23:35:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:13,682 INFO L93 Difference]: Finished difference Result 1303 states and 5057 transitions. [2021-06-05 23:35:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:35:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 27 [2021-06-05 23:35:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:13,685 INFO L225 Difference]: With dead ends: 1303 [2021-06-05 23:35:13,685 INFO L226 Difference]: Without dead ends: 1284 [2021-06-05 23:35:13,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 3527.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-06-05 23:35:13,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1004. [2021-06-05 23:35:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 4.161515453639082) internal successors, (4174), 1003 states have internal predecessors, (4174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 4174 transitions. [2021-06-05 23:35:13,698 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 4174 transitions. Word has length 27 [2021-06-05 23:35:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:13,698 INFO L482 AbstractCegarLoop]: Abstraction has 1004 states and 4174 transitions. [2021-06-05 23:35:13,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:35:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 4174 transitions. [2021-06-05 23:35:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:13,699 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:13,699 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:13,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 23:35:13,900 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:13,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:13,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1395696506, now seen corresponding path program 117 times [2021-06-05 23:35:13,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:13,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599521572] [2021-06-05 23:35:13,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:14,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:14,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599521572] [2021-06-05 23:35:14,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599521572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:14,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34319233] [2021-06-05 23:35:14,067 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:14,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:35:14,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:35:14,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:14,614 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:14,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34319233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:14,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:14,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414353429] [2021-06-05 23:35:14,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:14,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:14,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:14,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:14,615 INFO L87 Difference]: Start difference. First operand 1004 states and 4174 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:15,073 INFO L93 Difference]: Finished difference Result 1036 states and 4233 transitions. [2021-06-05 23:35:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:35:15,074 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:15,076 INFO L225 Difference]: With dead ends: 1036 [2021-06-05 23:35:15,076 INFO L226 Difference]: Without dead ends: 1018 [2021-06-05 23:35:15,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 791.7ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:35:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-06-05 23:35:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 991. [2021-06-05 23:35:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.161616161616162) internal successors, (4120), 990 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:15,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4120 transitions. [2021-06-05 23:35:15,088 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4120 transitions. Word has length 27 [2021-06-05 23:35:15,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:15,088 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4120 transitions. [2021-06-05 23:35:15,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:15,089 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4120 transitions. [2021-06-05 23:35:15,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:15,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:15,090 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:15,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 23:35:15,291 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:15,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1704301448, now seen corresponding path program 118 times [2021-06-05 23:35:15,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:15,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926189619] [2021-06-05 23:35:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:15,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:15,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926189619] [2021-06-05 23:35:15,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926189619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:15,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501451859] [2021-06-05 23:35:15,487 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:15,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:15,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:35:15,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:16,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501451859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:16,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:16,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738624581] [2021-06-05 23:35:16,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:16,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:16,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:16,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:16,132 INFO L87 Difference]: Start difference. First operand 991 states and 4120 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 23:35:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:16,570 INFO L93 Difference]: Finished difference Result 1016 states and 4172 transitions. [2021-06-05 23:35:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:35:16,570 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 27 [2021-06-05 23:35:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:16,572 INFO L225 Difference]: With dead ends: 1016 [2021-06-05 23:35:16,572 INFO L226 Difference]: Without dead ends: 1002 [2021-06-05 23:35:16,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 919.3ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-06-05 23:35:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 988. [2021-06-05 23:35:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 987 states have (on average 4.156028368794326) internal successors, (4102), 987 states have internal predecessors, (4102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 4102 transitions. [2021-06-05 23:35:16,583 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 4102 transitions. Word has length 27 [2021-06-05 23:35:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:16,583 INFO L482 AbstractCegarLoop]: Abstraction has 988 states and 4102 transitions. [2021-06-05 23:35:16,584 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 23:35:16,584 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 4102 transitions. [2021-06-05 23:35:16,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:16,585 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:16,585 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:16,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:16,785 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:16,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1973047876, now seen corresponding path program 119 times [2021-06-05 23:35:16,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:16,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412264825] [2021-06-05 23:35:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:16,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:16,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412264825] [2021-06-05 23:35:16,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412264825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:16,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162753116] [2021-06-05 23:35:16,950 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:16,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:35:16,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:35:16,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:17,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162753116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:17,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:17,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:17,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667667172] [2021-06-05 23:35:17,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:17,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:17,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:17,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:17,565 INFO L87 Difference]: Start difference. First operand 988 states and 4102 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 23:35:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:17,881 INFO L93 Difference]: Finished difference Result 959 states and 3842 transitions. [2021-06-05 23:35:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:35:17,882 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 27 [2021-06-05 23:35:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:17,883 INFO L225 Difference]: With dead ends: 959 [2021-06-05 23:35:17,883 INFO L226 Difference]: Without dead ends: 939 [2021-06-05 23:35:17,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 722.2ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-06-05 23:35:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 920. [2021-06-05 23:35:17,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.077257889009793) internal successors, (3747), 919 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3747 transitions. [2021-06-05 23:35:17,894 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3747 transitions. Word has length 27 [2021-06-05 23:35:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:17,894 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3747 transitions. [2021-06-05 23:35:17,894 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 23:35:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3747 transitions. [2021-06-05 23:35:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:17,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:17,895 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:18,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 23:35:18,095 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:18,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:18,096 INFO L82 PathProgramCache]: Analyzing trace with hash -174588260, now seen corresponding path program 120 times [2021-06-05 23:35:18,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:18,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521975119] [2021-06-05 23:35:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:18,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:18,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:18,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521975119] [2021-06-05 23:35:18,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521975119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:18,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020655972] [2021-06-05 23:35:18,256 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:18,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:35:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:18,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020655972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:18,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:18,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:18,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168074168] [2021-06-05 23:35:18,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:18,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:18,807 INFO L87 Difference]: Start difference. First operand 920 states and 3747 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:19,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:19,177 INFO L93 Difference]: Finished difference Result 963 states and 3864 transitions. [2021-06-05 23:35:19,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:35:19,177 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:19,179 INFO L225 Difference]: With dead ends: 963 [2021-06-05 23:35:19,179 INFO L226 Difference]: Without dead ends: 956 [2021-06-05 23:35:19,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-05 23:35:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 938. [2021-06-05 23:35:19,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 4.049092849519744) internal successors, (3794), 937 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3794 transitions. [2021-06-05 23:35:19,190 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3794 transitions. Word has length 27 [2021-06-05 23:35:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:19,190 INFO L482 AbstractCegarLoop]: Abstraction has 938 states and 3794 transitions. [2021-06-05 23:35:19,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3794 transitions. [2021-06-05 23:35:19,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:19,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:19,191 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:19,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:19,392 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:19,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1425340330, now seen corresponding path program 121 times [2021-06-05 23:35:19,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:19,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668673636] [2021-06-05 23:35:19,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:19,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:19,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668673636] [2021-06-05 23:35:19,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668673636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:19,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379827152] [2021-06-05 23:35:19,557 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:19,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:19,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:35:19,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:19,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:19,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:19,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:19,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:19,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:20,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:20,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:20,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:20,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:20,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 3 dim-1 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2021-06-05 23:35:20,064 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:107, output treesize:79 [2021-06-05 23:35:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:20,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379827152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:20,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:20,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2021-06-05 23:35:20,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999757721] [2021-06-05 23:35:20,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 23:35:20,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:20,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 23:35:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:35:20,155 INFO L87 Difference]: Start difference. First operand 938 states and 3794 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:35:24,409 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 23:35:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:26,756 INFO L93 Difference]: Finished difference Result 3046 states and 12070 transitions. [2021-06-05 23:35:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:35:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 27 [2021-06-05 23:35:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:26,762 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 23:35:26,762 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 23:35:26,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4750.2ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 23:35:26,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 1289. [2021-06-05 23:35:26,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 4.475931677018633) internal successors, (5765), 1288 states have internal predecessors, (5765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:26,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 5765 transitions. [2021-06-05 23:35:26,793 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 5765 transitions. Word has length 27 [2021-06-05 23:35:26,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:26,794 INFO L482 AbstractCegarLoop]: Abstraction has 1289 states and 5765 transitions. [2021-06-05 23:35:26,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 23:35:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 5765 transitions. [2021-06-05 23:35:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:26,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:26,796 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:26,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-05 23:35:26,996 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash 989899702, now seen corresponding path program 122 times [2021-06-05 23:35:26,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:26,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87204029] [2021-06-05 23:35:26,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:27,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:27,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87204029] [2021-06-05 23:35:27,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87204029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:27,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466932551] [2021-06-05 23:35:27,196 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:27,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:27,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466932551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:27,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:27,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:27,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745162847] [2021-06-05 23:35:27,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:27,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:27,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:27,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:27,782 INFO L87 Difference]: Start difference. First operand 1289 states and 5765 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:28,178 INFO L93 Difference]: Finished difference Result 1336 states and 5880 transitions. [2021-06-05 23:35:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:35:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:28,180 INFO L225 Difference]: With dead ends: 1336 [2021-06-05 23:35:28,180 INFO L226 Difference]: Without dead ends: 1318 [2021-06-05 23:35:28,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 815.4ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:28,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-06-05 23:35:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1292. [2021-06-05 23:35:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 4.472501936483346) internal successors, (5774), 1291 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:28,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 5774 transitions. [2021-06-05 23:35:28,197 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 5774 transitions. Word has length 27 [2021-06-05 23:35:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:28,197 INFO L482 AbstractCegarLoop]: Abstraction has 1292 states and 5774 transitions. [2021-06-05 23:35:28,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 5774 transitions. [2021-06-05 23:35:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:28,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:28,199 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:28,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:28,400 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:28,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1435291434, now seen corresponding path program 123 times [2021-06-05 23:35:28,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:28,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845849208] [2021-06-05 23:35:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:28,645 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:28,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:28,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845849208] [2021-06-05 23:35:28,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845849208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:28,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255466370] [2021-06-05 23:35:28,645 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:28,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:35:28,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:28,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:35:28,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:28,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:28,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:28,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:28,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:29,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:29,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:29,017 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:29,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:29,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:29,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:29,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:35:29,051 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-05 23:35:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255466370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:29,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:29,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 23:35:29,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850118506] [2021-06-05 23:35:29,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:35:29,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:29,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:35:29,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:35:29,165 INFO L87 Difference]: Start difference. First operand 1292 states and 5774 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:35:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:29,751 INFO L93 Difference]: Finished difference Result 3442 states and 14583 transitions. [2021-06-05 23:35:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:35:29,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 27 [2021-06-05 23:35:29,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:29,758 INFO L225 Difference]: With dead ends: 3442 [2021-06-05 23:35:29,758 INFO L226 Difference]: Without dead ends: 3422 [2021-06-05 23:35:29,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 681.0ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:29,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2021-06-05 23:35:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1575. [2021-06-05 23:35:29,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 4.708386277001271) internal successors, (7411), 1574 states have internal predecessors, (7411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 7411 transitions. [2021-06-05 23:35:29,789 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 7411 transitions. Word has length 27 [2021-06-05 23:35:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:29,789 INFO L482 AbstractCegarLoop]: Abstraction has 1575 states and 7411 transitions. [2021-06-05 23:35:29,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 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 23:35:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 7411 transitions. [2021-06-05 23:35:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:29,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:29,791 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:29,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:29,992 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:29,992 INFO L82 PathProgramCache]: Analyzing trace with hash -2110098252, now seen corresponding path program 124 times [2021-06-05 23:35:29,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:29,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377515544] [2021-06-05 23:35:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:30,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:30,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377515544] [2021-06-05 23:35:30,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377515544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:30,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706284796] [2021-06-05 23:35:30,163 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:30,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:30,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:30,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:30,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706284796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:30,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:30,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:30,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396645002] [2021-06-05 23:35:30,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:30,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:30,620 INFO L87 Difference]: Start difference. First operand 1575 states and 7411 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 23:35:31,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:31,004 INFO L93 Difference]: Finished difference Result 1607 states and 7481 transitions. [2021-06-05 23:35:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:35:31,004 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 27 [2021-06-05 23:35:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:31,008 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 23:35:31,009 INFO L226 Difference]: Without dead ends: 1593 [2021-06-05 23:35:31,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:31,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2021-06-05 23:35:31,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1572. [2021-06-05 23:35:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 4.707829408020369) internal successors, (7396), 1571 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:31,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 7396 transitions. [2021-06-05 23:35:31,039 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 7396 transitions. Word has length 27 [2021-06-05 23:35:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:31,039 INFO L482 AbstractCegarLoop]: Abstraction has 1572 states and 7396 transitions. [2021-06-05 23:35:31,039 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 23:35:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 7396 transitions. [2021-06-05 23:35:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:31,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:31,042 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:31,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 23:35:31,265 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1916122616, now seen corresponding path program 125 times [2021-06-05 23:35:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:31,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37051777] [2021-06-05 23:35:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:31,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:31,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37051777] [2021-06-05 23:35:31,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37051777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:31,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59598486] [2021-06-05 23:35:31,481 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:31,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:35:31,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:31,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:32,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59598486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:32,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:32,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:32,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855575604] [2021-06-05 23:35:32,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:32,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:32,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:32,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:32,127 INFO L87 Difference]: Start difference. First operand 1572 states and 7396 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 23:35:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:32,422 INFO L93 Difference]: Finished difference Result 1596 states and 7442 transitions. [2021-06-05 23:35:32,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:35:32,423 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 27 [2021-06-05 23:35:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:32,426 INFO L225 Difference]: With dead ends: 1596 [2021-06-05 23:35:32,426 INFO L226 Difference]: Without dead ends: 1577 [2021-06-05 23:35:32,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2021-06-05 23:35:32,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1549. [2021-06-05 23:35:32,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.732558139534884) internal successors, (7326), 1548 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7326 transitions. [2021-06-05 23:35:32,445 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7326 transitions. Word has length 27 [2021-06-05 23:35:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:32,445 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7326 transitions. [2021-06-05 23:35:32,446 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 23:35:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7326 transitions. [2021-06-05 23:35:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:32,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:32,448 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:32,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:32,648 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2033600990, now seen corresponding path program 126 times [2021-06-05 23:35:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:32,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292553747] [2021-06-05 23:35:32,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:32,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292553747] [2021-06-05 23:35:32,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292553747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915451636] [2021-06-05 23:35:32,825 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:32,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:35:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:32,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:32,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:33,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:33,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:33,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:33,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:33,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:33,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:33,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:33,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:33,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:33,438 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:33,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:33,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:35:33,477 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:133, output treesize:105 [2021-06-05 23:35:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:33,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915451636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:33,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:33,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-06-05 23:35:33,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977745776] [2021-06-05 23:35:33,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:35:33,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:33,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:35:33,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:35:33,605 INFO L87 Difference]: Start difference. First operand 1549 states and 7326 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:34,244 INFO L93 Difference]: Finished difference Result 1650 states and 7580 transitions. [2021-06-05 23:35:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:35:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:34,247 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 23:35:34,247 INFO L226 Difference]: Without dead ends: 1642 [2021-06-05 23:35:34,247 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1065.7ms TimeCoverageRelationStatistics Valid=117, Invalid=1005, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:35:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-06-05 23:35:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1549. [2021-06-05 23:35:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 4.715762273901809) internal successors, (7300), 1548 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 7300 transitions. [2021-06-05 23:35:34,268 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 7300 transitions. Word has length 27 [2021-06-05 23:35:34,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:34,268 INFO L482 AbstractCegarLoop]: Abstraction has 1549 states and 7300 transitions. [2021-06-05 23:35:34,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:34,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 7300 transitions. [2021-06-05 23:35:34,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:34,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:34,271 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:34,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable562,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:34,471 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:34,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1358794172, now seen corresponding path program 127 times [2021-06-05 23:35:34,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:34,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828413483] [2021-06-05 23:35:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:34,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828413483] [2021-06-05 23:35:34,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828413483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363082207] [2021-06-05 23:35:34,638 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:34,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:34,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:35,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363082207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:35,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:35,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:35,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266585852] [2021-06-05 23:35:35,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:35,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:35,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:35,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:35,295 INFO L87 Difference]: Start difference. First operand 1549 states and 7300 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 23:35:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:35,518 INFO L93 Difference]: Finished difference Result 1575 states and 7357 transitions. [2021-06-05 23:35:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:35:35,518 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 27 [2021-06-05 23:35:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:35,521 INFO L225 Difference]: With dead ends: 1575 [2021-06-05 23:35:35,521 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 23:35:35,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 741.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:35,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 23:35:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1542. [2021-06-05 23:35:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 4.720960415314731) internal successors, (7275), 1541 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:35,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 7275 transitions. [2021-06-05 23:35:35,542 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 7275 transitions. Word has length 27 [2021-06-05 23:35:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:35,542 INFO L482 AbstractCegarLoop]: Abstraction has 1542 states and 7275 transitions. [2021-06-05 23:35:35,542 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 23:35:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 7275 transitions. [2021-06-05 23:35:35,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:35,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:35,562 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:35,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2021-06-05 23:35:35,763 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1617589496, now seen corresponding path program 128 times [2021-06-05 23:35:35,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:35,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161560106] [2021-06-05 23:35:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:36,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:36,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161560106] [2021-06-05 23:35:36,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161560106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:36,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141366669] [2021-06-05 23:35:36,012 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:36,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:36,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:35:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:36,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141366669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:36,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:36,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:36,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551631260] [2021-06-05 23:35:36,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:36,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:36,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:36,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:36,784 INFO L87 Difference]: Start difference. First operand 1542 states and 7275 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 23:35:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:37,123 INFO L93 Difference]: Finished difference Result 1472 states and 6714 transitions. [2021-06-05 23:35:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:35:37,123 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 27 [2021-06-05 23:35:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:37,126 INFO L225 Difference]: With dead ends: 1472 [2021-06-05 23:35:37,126 INFO L226 Difference]: Without dead ends: 1458 [2021-06-05 23:35:37,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1018.4ms TimeCoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2021-06-05 23:35:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1437. [2021-06-05 23:35:37,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 4.616295264623956) internal successors, (6629), 1436 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 6629 transitions. [2021-06-05 23:35:37,151 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 6629 transitions. Word has length 27 [2021-06-05 23:35:37,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:37,151 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 6629 transitions. [2021-06-05 23:35:37,151 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 23:35:37,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 6629 transitions. [2021-06-05 23:35:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:37,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:37,154 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:37,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:37,357 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:37,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1348843068, now seen corresponding path program 129 times [2021-06-05 23:35:37,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:37,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969489331] [2021-06-05 23:35:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:37,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:37,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969489331] [2021-06-05 23:35:37,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969489331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:37,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388586183] [2021-06-05 23:35:37,555 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:37,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:35:37,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:37,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:35:37,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:38,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388586183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:38,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:38,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:38,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508717684] [2021-06-05 23:35:38,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:38,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:38,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:38,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:38,270 INFO L87 Difference]: Start difference. First operand 1437 states and 6629 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 23:35:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:38,714 INFO L93 Difference]: Finished difference Result 1273 states and 5538 transitions. [2021-06-05 23:35:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:35:38,714 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 27 [2021-06-05 23:35:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:38,716 INFO L225 Difference]: With dead ends: 1273 [2021-06-05 23:35:38,716 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 23:35:38,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 853.3ms TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:38,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 23:35:38,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1232. [2021-06-05 23:35:38,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 4.418359057676685) internal successors, (5439), 1231 states have internal predecessors, (5439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 5439 transitions. [2021-06-05 23:35:38,732 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 5439 transitions. Word has length 27 [2021-06-05 23:35:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:38,732 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 5439 transitions. [2021-06-05 23:35:38,732 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 23:35:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 5439 transitions. [2021-06-05 23:35:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:38,734 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:38,734 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:38,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 23:35:38,934 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash -133551674, now seen corresponding path program 130 times [2021-06-05 23:35:38,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:38,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790773852] [2021-06-05 23:35:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:39,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:39,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790773852] [2021-06-05 23:35:39,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790773852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:39,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576319818] [2021-06-05 23:35:39,101 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:39,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:39,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:39,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:35:39,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:39,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:39,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:39,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:39,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:39,436 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:39,440 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:39,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:39,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:35:39,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-05 23:35:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:39,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576319818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:39,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:39,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 22 [2021-06-05 23:35:39,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285953646] [2021-06-05 23:35:39,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:35:39,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:39,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:35:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:35:39,574 INFO L87 Difference]: Start difference. First operand 1232 states and 5439 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:40,063 INFO L93 Difference]: Finished difference Result 2587 states and 10394 transitions. [2021-06-05 23:35:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:35:40,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:40,069 INFO L225 Difference]: With dead ends: 2587 [2021-06-05 23:35:40,069 INFO L226 Difference]: Without dead ends: 2542 [2021-06-05 23:35:40,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 609.6ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:35:40,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-06-05 23:35:40,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1419. [2021-06-05 23:35:40,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 4.562059238363893) internal successors, (6469), 1418 states have internal predecessors, (6469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 6469 transitions. [2021-06-05 23:35:40,100 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 6469 transitions. Word has length 27 [2021-06-05 23:35:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:40,100 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 6469 transitions. [2021-06-05 23:35:40,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 6469 transitions. [2021-06-05 23:35:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:40,103 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:40,103 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:40,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:40,303 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:40,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1158265598, now seen corresponding path program 131 times [2021-06-05 23:35:40,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:40,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938660927] [2021-06-05 23:35:40,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:40,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:40,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938660927] [2021-06-05 23:35:40,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938660927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:40,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459880761] [2021-06-05 23:35:40,460 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:40,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:35:40,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:40,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:41,176 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:41,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459880761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:41,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:41,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:41,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390385503] [2021-06-05 23:35:41,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:41,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:41,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:41,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:41,177 INFO L87 Difference]: Start difference. First operand 1419 states and 6469 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:41,357 INFO L93 Difference]: Finished difference Result 1448 states and 6542 transitions. [2021-06-05 23:35:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:35:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:41,359 INFO L225 Difference]: With dead ends: 1448 [2021-06-05 23:35:41,359 INFO L226 Difference]: Without dead ends: 1440 [2021-06-05 23:35:41,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 698.2ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2021-06-05 23:35:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1417. [2021-06-05 23:35:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1416 states have (on average 4.562146892655368) internal successors, (6460), 1416 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 6460 transitions. [2021-06-05 23:35:41,378 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 6460 transitions. Word has length 27 [2021-06-05 23:35:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:41,378 INFO L482 AbstractCegarLoop]: Abstraction has 1417 states and 6460 transitions. [2021-06-05 23:35:41,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 6460 transitions. [2021-06-05 23:35:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:41,381 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:41,381 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:41,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 23:35:41,581 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash -664653662, now seen corresponding path program 132 times [2021-06-05 23:35:41,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:41,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916787777] [2021-06-05 23:35:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:41,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:41,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916787777] [2021-06-05 23:35:41,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916787777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:41,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600433104] [2021-06-05 23:35:41,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:41,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:35:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:35:41,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:42,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:42,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:42,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:42,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:42,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:42,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:42,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:35:42,379 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-06-05 23:35:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:42,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600433104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:42,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:42,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 23:35:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596134276] [2021-06-05 23:35:42,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:35:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:35:42,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:35:42,432 INFO L87 Difference]: Start difference. First operand 1417 states and 6460 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:42,751 INFO L93 Difference]: Finished difference Result 1648 states and 7113 transitions. [2021-06-05 23:35:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:35:42,751 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:42,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:42,754 INFO L225 Difference]: With dead ends: 1648 [2021-06-05 23:35:42,754 INFO L226 Difference]: Without dead ends: 1628 [2021-06-05 23:35:42,754 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 766.4ms TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:42,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2021-06-05 23:35:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1436. [2021-06-05 23:35:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 4.559581881533101) internal successors, (6543), 1435 states have internal predecessors, (6543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 6543 transitions. [2021-06-05 23:35:42,773 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 6543 transitions. Word has length 27 [2021-06-05 23:35:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:42,774 INFO L482 AbstractCegarLoop]: Abstraction has 1436 states and 6543 transitions. [2021-06-05 23:35:42,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 6543 transitions. [2021-06-05 23:35:42,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:42,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:42,776 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:42,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:42,977 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:42,977 INFO L82 PathProgramCache]: Analyzing trace with hash -267499616, now seen corresponding path program 133 times [2021-06-05 23:35:42,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:42,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510342116] [2021-06-05 23:35:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:43,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:43,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510342116] [2021-06-05 23:35:43,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510342116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:43,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818037873] [2021-06-05 23:35:43,174 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:43,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:43,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:43,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818037873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:43,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:43,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:43,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556465405] [2021-06-05 23:35:43,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:43,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:43,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:43,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:43,949 INFO L87 Difference]: Start difference. First operand 1436 states and 6543 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:44,503 INFO L93 Difference]: Finished difference Result 1480 states and 6651 transitions. [2021-06-05 23:35:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:35:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:44,506 INFO L225 Difference]: With dead ends: 1480 [2021-06-05 23:35:44,506 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 23:35:44,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1032.0ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:35:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 23:35:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1441. [2021-06-05 23:35:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.552777777777778) internal successors, (6556), 1440 states have internal predecessors, (6556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:44,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6556 transitions. [2021-06-05 23:35:44,525 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6556 transitions. Word has length 27 [2021-06-05 23:35:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:44,525 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6556 transitions. [2021-06-05 23:35:44,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:44,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6556 transitions. [2021-06-05 23:35:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:44,527 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:44,527 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:44,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:44,728 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:44,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1700897470, now seen corresponding path program 134 times [2021-06-05 23:35:44,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:44,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584334572] [2021-06-05 23:35:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:45,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:45,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584334572] [2021-06-05 23:35:45,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584334572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:45,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130172786] [2021-06-05 23:35:45,052 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:45,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:45,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:45,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:45,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130172786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:45,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:45,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:45,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646095966] [2021-06-05 23:35:45,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:45,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:45,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:45,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:45,744 INFO L87 Difference]: Start difference. First operand 1441 states and 6556 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:46,218 INFO L93 Difference]: Finished difference Result 1485 states and 6664 transitions. [2021-06-05 23:35:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:35:46,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:46,220 INFO L225 Difference]: With dead ends: 1485 [2021-06-05 23:35:46,220 INFO L226 Difference]: Without dead ends: 1469 [2021-06-05 23:35:46,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 978.0ms TimeCoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-06-05 23:35:46,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1441. [2021-06-05 23:35:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 4.551388888888889) internal successors, (6554), 1440 states have internal predecessors, (6554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 6554 transitions. [2021-06-05 23:35:46,239 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 6554 transitions. Word has length 27 [2021-06-05 23:35:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:46,239 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 6554 transitions. [2021-06-05 23:35:46,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 6554 transitions. [2021-06-05 23:35:46,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:46,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:46,241 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:46,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 23:35:46,441 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash -724293666, now seen corresponding path program 135 times [2021-06-05 23:35:46,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:46,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210934669] [2021-06-05 23:35:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:46,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210934669] [2021-06-05 23:35:46,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210934669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:46,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160631431] [2021-06-05 23:35:46,608 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:46,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:35:46,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:35:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:46,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:46,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:46,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:46,910 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:46,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:46,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:46,943 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:46,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:46,946 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:46,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:46,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:35:46,972 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:99, output treesize:71 [2021-06-05 23:35:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160631431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-05 23:35:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145127557] [2021-06-05 23:35:47,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 23:35:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 23:35:47,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 23:35:47,081 INFO L87 Difference]: Start difference. First operand 1441 states and 6554 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:47,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:47,753 INFO L93 Difference]: Finished difference Result 2434 states and 10147 transitions. [2021-06-05 23:35:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:35:47,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:47,758 INFO L225 Difference]: With dead ends: 2434 [2021-06-05 23:35:47,758 INFO L226 Difference]: Without dead ends: 2415 [2021-06-05 23:35:47,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 719.8ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:47,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-05 23:35:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1570. [2021-06-05 23:35:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 4.625239005736137) internal successors, (7257), 1569 states have internal predecessors, (7257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 7257 transitions. [2021-06-05 23:35:47,784 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 7257 transitions. Word has length 27 [2021-06-05 23:35:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:47,784 INFO L482 AbstractCegarLoop]: Abstraction has 1570 states and 7257 transitions. [2021-06-05 23:35:47,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 7257 transitions. [2021-06-05 23:35:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:47,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:47,786 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:47,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 23:35:47,987 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:47,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:47,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1399100484, now seen corresponding path program 136 times [2021-06-05 23:35:47,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:47,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057699994] [2021-06-05 23:35:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:48,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057699994] [2021-06-05 23:35:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057699994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877270093] [2021-06-05 23:35:48,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:48,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:48,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:48,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:48,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:48,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877270093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:48,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:48,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306192079] [2021-06-05 23:35:48,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:48,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:48,760 INFO L87 Difference]: Start difference. First operand 1570 states and 7257 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 23:35:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:49,161 INFO L93 Difference]: Finished difference Result 1530 states and 6921 transitions. [2021-06-05 23:35:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:35:49,161 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 27 [2021-06-05 23:35:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:49,164 INFO L225 Difference]: With dead ends: 1530 [2021-06-05 23:35:49,164 INFO L226 Difference]: Without dead ends: 1516 [2021-06-05 23:35:49,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:35:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-06-05 23:35:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1499. [2021-06-05 23:35:49,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 4.568758344459279) internal successors, (6844), 1498 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 6844 transitions. [2021-06-05 23:35:49,183 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 6844 transitions. Word has length 27 [2021-06-05 23:35:49,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:49,183 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 6844 transitions. [2021-06-05 23:35:49,183 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 23:35:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 6844 transitions. [2021-06-05 23:35:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:49,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:49,185 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:49,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-06-05 23:35:49,386 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1667846912, now seen corresponding path program 137 times [2021-06-05 23:35:49,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:49,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861472249] [2021-06-05 23:35:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:49,560 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:49,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861472249] [2021-06-05 23:35:49,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861472249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:49,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142713781] [2021-06-05 23:35:49,560 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:49,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:35:49,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:49,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:35:49,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:50,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142713781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:50,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:50,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:50,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616660778] [2021-06-05 23:35:50,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:50,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:50,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:50,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:50,204 INFO L87 Difference]: Start difference. First operand 1499 states and 6844 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 23:35:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:50,450 INFO L93 Difference]: Finished difference Result 1529 states and 6905 transitions. [2021-06-05 23:35:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:35:50,450 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 27 [2021-06-05 23:35:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:50,453 INFO L225 Difference]: With dead ends: 1529 [2021-06-05 23:35:50,453 INFO L226 Difference]: Without dead ends: 1511 [2021-06-05 23:35:50,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-06-05 23:35:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1483. [2021-06-05 23:35:50,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 4.582321187584346) internal successors, (6791), 1482 states have internal predecessors, (6791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 6791 transitions. [2021-06-05 23:35:50,472 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 6791 transitions. Word has length 27 [2021-06-05 23:35:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:50,472 INFO L482 AbstractCegarLoop]: Abstraction has 1483 states and 6791 transitions. [2021-06-05 23:35:50,472 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 23:35:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 6791 transitions. [2021-06-05 23:35:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:50,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:50,474 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:50,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:50,677 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:50,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1070450466, now seen corresponding path program 138 times [2021-06-05 23:35:50,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:50,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919446465] [2021-06-05 23:35:50,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:35:50,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:50,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919446465] [2021-06-05 23:35:50,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919446465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:50,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934696357] [2021-06-05 23:35:50,838 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:50,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:35:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:35:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:51,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:51,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:51,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:51,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:35:51,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:35:51,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:35:51,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 23:35:51,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:58, output treesize:44 [2021-06-05 23:35:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:51,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934696357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:51,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:51,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-06-05 23:35:51,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861602776] [2021-06-05 23:35:51,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:35:51,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:51,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:35:51,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:35:51,530 INFO L87 Difference]: Start difference. First operand 1483 states and 6791 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:51,943 INFO L93 Difference]: Finished difference Result 2432 states and 10217 transitions. [2021-06-05 23:35:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:35:51,943 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:51,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:51,947 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 23:35:51,947 INFO L226 Difference]: Without dead ends: 2404 [2021-06-05 23:35:51,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 795.7ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:35:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2021-06-05 23:35:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 1620. [2021-06-05 23:35:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1620 states, 1619 states have (on average 4.625077208153181) internal successors, (7488), 1619 states have internal predecessors, (7488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:51,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1620 states to 1620 states and 7488 transitions. [2021-06-05 23:35:51,972 INFO L78 Accepts]: Start accepts. Automaton has 1620 states and 7488 transitions. Word has length 27 [2021-06-05 23:35:51,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:51,972 INFO L482 AbstractCegarLoop]: Abstraction has 1620 states and 7488 transitions. [2021-06-05 23:35:51,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:51,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1620 states and 7488 transitions. [2021-06-05 23:35:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:51,974 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:51,974 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:52,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 23:35:52,175 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:52,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:52,175 INFO L82 PathProgramCache]: Analyzing trace with hash 175326052, now seen corresponding path program 139 times [2021-06-05 23:35:52,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:52,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126122680] [2021-06-05 23:35:52,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:52,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:52,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126122680] [2021-06-05 23:35:52,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126122680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:52,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511363457] [2021-06-05 23:35:52,371 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:52,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:52,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:35:52,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:53,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511363457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:53,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:53,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:53,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756408095] [2021-06-05 23:35:53,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:53,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:53,142 INFO L87 Difference]: Start difference. First operand 1620 states and 7488 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:53,700 INFO L93 Difference]: Finished difference Result 1647 states and 7547 transitions. [2021-06-05 23:35:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:35:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:53,703 INFO L225 Difference]: With dead ends: 1647 [2021-06-05 23:35:53,703 INFO L226 Difference]: Without dead ends: 1633 [2021-06-05 23:35:53,703 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1074.0ms TimeCoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:35:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-06-05 23:35:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1612. [2021-06-05 23:35:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1611 states have (on average 4.631905648665425) internal successors, (7462), 1611 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 7462 transitions. [2021-06-05 23:35:53,724 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 7462 transitions. Word has length 27 [2021-06-05 23:35:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:53,724 INFO L482 AbstractCegarLoop]: Abstraction has 1612 states and 7462 transitions. [2021-06-05 23:35:53,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 7462 transitions. [2021-06-05 23:35:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 23:35:53,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:53,727 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:53,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:53,927 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:53,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:53,927 INFO L82 PathProgramCache]: Analyzing trace with hash -673296420, now seen corresponding path program 140 times [2021-06-05 23:35:53,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:53,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456489183] [2021-06-05 23:35:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:54,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:54,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456489183] [2021-06-05 23:35:54,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456489183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:54,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246429984] [2021-06-05 23:35:54,204 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:54,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:35:54,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:54,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:35:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:54,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246429984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:54,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:54,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:35:54,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886542007] [2021-06-05 23:35:54,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:35:54,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:54,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:35:54,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:35:54,747 INFO L87 Difference]: Start difference. First operand 1612 states and 7462 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:55,252 INFO L93 Difference]: Finished difference Result 1632 states and 7497 transitions. [2021-06-05 23:35:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:35:55,252 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 23:35:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:55,255 INFO L225 Difference]: With dead ends: 1632 [2021-06-05 23:35:55,255 INFO L226 Difference]: Without dead ends: 1614 [2021-06-05 23:35:55,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 883.0ms TimeCoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:35:55,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-06-05 23:35:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1586. [2021-06-05 23:35:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 4.6574132492113565) internal successors, (7382), 1585 states have internal predecessors, (7382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:55,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 7382 transitions. [2021-06-05 23:35:55,296 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 7382 transitions. Word has length 27 [2021-06-05 23:35:55,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:55,296 INFO L482 AbstractCegarLoop]: Abstraction has 1586 states and 7382 transitions. [2021-06-05 23:35:55,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 7382 transitions. [2021-06-05 23:35:55,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:35:55,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:55,299 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:55,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:55,499 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:55,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:55,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1068054097, now seen corresponding path program 141 times [2021-06-05 23:35:55,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:55,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391811336] [2021-06-05 23:35:55,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:55,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:55,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391811336] [2021-06-05 23:35:55,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391811336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:55,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840002640] [2021-06-05 23:35:55,717 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:55,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:35:55,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:55,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:35:55,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:56,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840002640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:56,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:56,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:35:56,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321848147] [2021-06-05 23:35:56,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:56,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:56,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:56,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:56,677 INFO L87 Difference]: Start difference. First operand 1586 states and 7382 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:35:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:57,291 INFO L93 Difference]: Finished difference Result 1626 states and 7470 transitions. [2021-06-05 23:35:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:35:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:35:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:57,295 INFO L225 Difference]: With dead ends: 1626 [2021-06-05 23:35:57,295 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 23:35:57,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1361.8ms TimeCoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:35:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 23:35:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1600. [2021-06-05 23:35:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 4.632895559724828) internal successors, (7408), 1599 states have internal predecessors, (7408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:57,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 7408 transitions. [2021-06-05 23:35:57,315 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 7408 transitions. Word has length 28 [2021-06-05 23:35:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:57,315 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 7408 transitions. [2021-06-05 23:35:57,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:35:57,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 7408 transitions. [2021-06-05 23:35:57,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:35:57,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:57,318 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:57,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:57,518 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1313380425, now seen corresponding path program 142 times [2021-06-05 23:35:57,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:57,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795050621] [2021-06-05 23:35:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:57,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:57,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795050621] [2021-06-05 23:35:57,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795050621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:57,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396455766] [2021-06-05 23:35:57,938 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:57,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:35:57,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:57,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:57,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:35:58,340 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 23:35:58,506 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:35:58,807 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:58,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396455766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:58,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:35:58,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:35:58,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345439149] [2021-06-05 23:35:58,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:35:58,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:35:58,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:35:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:35:58,808 INFO L87 Difference]: Start difference. First operand 1600 states and 7408 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:35:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:35:59,434 INFO L93 Difference]: Finished difference Result 1634 states and 7482 transitions. [2021-06-05 23:35:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:35:59,434 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:35:59,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:35:59,437 INFO L225 Difference]: With dead ends: 1634 [2021-06-05 23:35:59,437 INFO L226 Difference]: Without dead ends: 1630 [2021-06-05 23:35:59,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1439.6ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:35:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2021-06-05 23:35:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1604. [2021-06-05 23:35:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 4.625077978789769) internal successors, (7414), 1603 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:35:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 7414 transitions. [2021-06-05 23:35:59,457 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 7414 transitions. Word has length 28 [2021-06-05 23:35:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:35:59,457 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 7414 transitions. [2021-06-05 23:35:59,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:35:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 7414 transitions. [2021-06-05 23:35:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:35:59,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:35:59,460 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:35:59,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable630,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:59,660 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:35:59,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:35:59,661 INFO L82 PathProgramCache]: Analyzing trace with hash 775887569, now seen corresponding path program 143 times [2021-06-05 23:35:59,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:35:59,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972418034] [2021-06-05 23:35:59,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:35:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:35:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:35:59,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:35:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972418034] [2021-06-05 23:35:59,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972418034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:35:59,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387479187] [2021-06-05 23:35:59,902 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:35:59,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:35:59,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:35:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:35:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:00,460 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:36:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387479187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:00,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:00,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:00,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727435262] [2021-06-05 23:36:00,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:00,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:00,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:00,927 INFO L87 Difference]: Start difference. First operand 1604 states and 7414 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:01,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:01,372 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-06-05 23:36:01,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:36:01,372 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:01,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:01,375 INFO L225 Difference]: With dead ends: 1651 [2021-06-05 23:36:01,375 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 23:36:01,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1236.5ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:36:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 23:36:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1616. [2021-06-05 23:36:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 4.610526315789474) internal successors, (7446), 1615 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:01,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 7446 transitions. [2021-06-05 23:36:01,396 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 7446 transitions. Word has length 28 [2021-06-05 23:36:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:01,396 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 7446 transitions. [2021-06-05 23:36:01,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 7446 transitions. [2021-06-05 23:36:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:01,398 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:01,398 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:01,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 23:36:01,599 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:01,599 INFO L82 PathProgramCache]: Analyzing trace with hash -72733363, now seen corresponding path program 144 times [2021-06-05 23:36:01,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:01,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118579910] [2021-06-05 23:36:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:01,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:01,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118579910] [2021-06-05 23:36:01,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118579910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:01,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219461059] [2021-06-05 23:36:01,867 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:01,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:36:01,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:01,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:01,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:02,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219461059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:02,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:02,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:02,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245129992] [2021-06-05 23:36:02,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:02,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:02,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:02,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:02,635 INFO L87 Difference]: Start difference. First operand 1616 states and 7446 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:03,496 INFO L93 Difference]: Finished difference Result 1651 states and 7525 transitions. [2021-06-05 23:36:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:36:03,497 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:03,499 INFO L225 Difference]: With dead ends: 1651 [2021-06-05 23:36:03,499 INFO L226 Difference]: Without dead ends: 1647 [2021-06-05 23:36:03,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1460.1ms TimeCoverageRelationStatistics Valid=137, Invalid=1503, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:36:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-06-05 23:36:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1617. [2021-06-05 23:36:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.608292079207921) internal successors, (7447), 1616 states have internal predecessors, (7447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7447 transitions. [2021-06-05 23:36:03,521 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7447 transitions. Word has length 28 [2021-06-05 23:36:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:03,521 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7447 transitions. [2021-06-05 23:36:03,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7447 transitions. [2021-06-05 23:36:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:03,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:03,523 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:03,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 23:36:03,724 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:03,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:03,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1666655091, now seen corresponding path program 145 times [2021-06-05 23:36:03,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:03,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524369010] [2021-06-05 23:36:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:04,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:04,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524369010] [2021-06-05 23:36:04,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524369010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:04,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509051228] [2021-06-05 23:36:04,015 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:04,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:04,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:04,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509051228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:04,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:04,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:04,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134670700] [2021-06-05 23:36:04,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:04,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:04,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:04,775 INFO L87 Difference]: Start difference. First operand 1617 states and 7447 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:05,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:05,271 INFO L93 Difference]: Finished difference Result 1661 states and 7546 transitions. [2021-06-05 23:36:05,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:36:05,271 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:05,274 INFO L225 Difference]: With dead ends: 1661 [2021-06-05 23:36:05,274 INFO L226 Difference]: Without dead ends: 1657 [2021-06-05 23:36:05,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1160.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:36:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-06-05 23:36:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1613. [2021-06-05 23:36:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 4.61166253101737) internal successors, (7434), 1612 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:05,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 7434 transitions. [2021-06-05 23:36:05,295 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 7434 transitions. Word has length 28 [2021-06-05 23:36:05,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:05,295 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 7434 transitions. [2021-06-05 23:36:05,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:05,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 7434 transitions. [2021-06-05 23:36:05,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:05,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:05,297 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:05,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 23:36:05,498 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:05,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:05,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1997787763, now seen corresponding path program 146 times [2021-06-05 23:36:05,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:05,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965523667] [2021-06-05 23:36:05,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:05,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965523667] [2021-06-05 23:36:05,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965523667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:05,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941001080] [2021-06-05 23:36:05,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:05,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:05,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:06,248 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 23:36:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:06,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941001080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:06,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:06,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:06,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054344976] [2021-06-05 23:36:06,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:06,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:06,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:06,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:06,632 INFO L87 Difference]: Start difference. First operand 1613 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:07,193 INFO L93 Difference]: Finished difference Result 1648 states and 7509 transitions. [2021-06-05 23:36:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:36:07,193 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:07,196 INFO L225 Difference]: With dead ends: 1648 [2021-06-05 23:36:07,197 INFO L226 Difference]: Without dead ends: 1644 [2021-06-05 23:36:07,197 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1279.4ms TimeCoverageRelationStatistics Valid=102, Invalid=1020, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:36:07,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-06-05 23:36:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1618. [2021-06-05 23:36:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.6017316017316015) internal successors, (7441), 1617 states have internal predecessors, (7441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7441 transitions. [2021-06-05 23:36:07,232 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7441 transitions. Word has length 28 [2021-06-05 23:36:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:07,232 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7441 transitions. [2021-06-05 23:36:07,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7441 transitions. [2021-06-05 23:36:07,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:07,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:07,234 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:07,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable646,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:07,435 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:07,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:07,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2038384209, now seen corresponding path program 147 times [2021-06-05 23:36:07,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:07,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700553988] [2021-06-05 23:36:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:07,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:07,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700553988] [2021-06-05 23:36:07,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700553988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:07,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861639472] [2021-06-05 23:36:07,622 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:07,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:36:07,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:07,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:36:07,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:08,107 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 23:36:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:08,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861639472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:08,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:08,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:08,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515120689] [2021-06-05 23:36:08,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:08,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:08,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:08,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:08,467 INFO L87 Difference]: Start difference. First operand 1618 states and 7441 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:08,877 INFO L93 Difference]: Finished difference Result 1653 states and 7516 transitions. [2021-06-05 23:36:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:36:08,877 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:08,880 INFO L225 Difference]: With dead ends: 1653 [2021-06-05 23:36:08,880 INFO L226 Difference]: Without dead ends: 1649 [2021-06-05 23:36:08,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1026.3ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:36:08,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-05 23:36:08,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1617. [2021-06-05 23:36:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 4.600866336633663) internal successors, (7435), 1616 states have internal predecessors, (7435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 7435 transitions. [2021-06-05 23:36:08,901 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 7435 transitions. Word has length 28 [2021-06-05 23:36:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:08,902 INFO L482 AbstractCegarLoop]: Abstraction has 1617 states and 7435 transitions. [2021-06-05 23:36:08,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:08,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 7435 transitions. [2021-06-05 23:36:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:08,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:08,904 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:09,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable650,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:09,104 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 232467601, now seen corresponding path program 148 times [2021-06-05 23:36:09,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:09,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369646135] [2021-06-05 23:36:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:09,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369646135] [2021-06-05 23:36:09,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369646135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:09,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066788851] [2021-06-05 23:36:09,330 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:09,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:09,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:09,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:09,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:09,813 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 23:36:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066788851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:10,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:10,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:10,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238383089] [2021-06-05 23:36:10,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:10,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:10,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:10,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:10,140 INFO L87 Difference]: Start difference. First operand 1617 states and 7435 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:10,603 INFO L93 Difference]: Finished difference Result 1656 states and 7522 transitions. [2021-06-05 23:36:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:36:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:10,606 INFO L225 Difference]: With dead ends: 1656 [2021-06-05 23:36:10,606 INFO L226 Difference]: Without dead ends: 1652 [2021-06-05 23:36:10,606 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1122.5ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:36:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-06-05 23:36:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1622. [2021-06-05 23:36:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.592227020357804) internal successors, (7444), 1621 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7444 transitions. [2021-06-05 23:36:10,628 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7444 transitions. Word has length 28 [2021-06-05 23:36:10,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:10,628 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7444 transitions. [2021-06-05 23:36:10,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7444 transitions. [2021-06-05 23:36:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:10,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:10,630 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:10,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable655 [2021-06-05 23:36:10,833 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:10,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:10,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1971856055, now seen corresponding path program 149 times [2021-06-05 23:36:10,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:10,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592401034] [2021-06-05 23:36:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:11,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:11,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592401034] [2021-06-05 23:36:11,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592401034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:11,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837271055] [2021-06-05 23:36:11,041 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:11,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:36:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:36:11,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:11,510 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 23:36:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:11,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837271055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:11,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:11,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:11,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190421] [2021-06-05 23:36:11,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:11,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:11,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:11,983 INFO L87 Difference]: Start difference. First operand 1622 states and 7444 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:12,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:12,256 INFO L93 Difference]: Finished difference Result 1668 states and 7554 transitions. [2021-06-05 23:36:12,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:12,256 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:12,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:12,260 INFO L225 Difference]: With dead ends: 1668 [2021-06-05 23:36:12,260 INFO L226 Difference]: Without dead ends: 1664 [2021-06-05 23:36:12,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1041.4ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:36:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-06-05 23:36:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1632. [2021-06-05 23:36:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 4.58185162477008) internal successors, (7473), 1631 states have internal predecessors, (7473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 7473 transitions. [2021-06-05 23:36:12,282 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 7473 transitions. Word has length 28 [2021-06-05 23:36:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:12,282 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 7473 transitions. [2021-06-05 23:36:12,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 7473 transitions. [2021-06-05 23:36:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:12,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:12,285 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:12,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:12,489 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:12,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:12,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1991978569, now seen corresponding path program 150 times [2021-06-05 23:36:12,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:12,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714012796] [2021-06-05 23:36:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:12,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:12,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714012796] [2021-06-05 23:36:12,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714012796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:12,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544660096] [2021-06-05 23:36:12,713 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:12,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:36:12,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:12,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:13,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544660096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:13,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:13,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:13,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306096664] [2021-06-05 23:36:13,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:13,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:13,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:13,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:13,404 INFO L87 Difference]: Start difference. First operand 1632 states and 7473 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:13,743 INFO L93 Difference]: Finished difference Result 1671 states and 7560 transitions. [2021-06-05 23:36:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:36:13,744 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:13,747 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 23:36:13,747 INFO L226 Difference]: Without dead ends: 1667 [2021-06-05 23:36:13,747 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 928.0ms TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:36:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2021-06-05 23:36:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1636. [2021-06-05 23:36:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 4.575535168195719) internal successors, (7481), 1635 states have internal predecessors, (7481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 7481 transitions. [2021-06-05 23:36:13,767 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 7481 transitions. Word has length 28 [2021-06-05 23:36:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:13,767 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 7481 transitions. [2021-06-05 23:36:13,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 7481 transitions. [2021-06-05 23:36:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:13,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:13,769 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:13,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 23:36:13,970 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:13,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1733183245, now seen corresponding path program 151 times [2021-06-05 23:36:13,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:13,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914455895] [2021-06-05 23:36:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:14,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:14,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914455895] [2021-06-05 23:36:14,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914455895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:14,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261622482] [2021-06-05 23:36:14,168 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:36:14,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:14,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261622482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:14,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:14,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:14,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469853924] [2021-06-05 23:36:14,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:14,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:14,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:14,836 INFO L87 Difference]: Start difference. First operand 1636 states and 7481 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:15,254 INFO L93 Difference]: Finished difference Result 1674 states and 7564 transitions. [2021-06-05 23:36:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:15,257 INFO L225 Difference]: With dead ends: 1674 [2021-06-05 23:36:15,257 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 23:36:15,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:36:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 23:36:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1627. [2021-06-05 23:36:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 4.583640836408364) internal successors, (7453), 1626 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 7453 transitions. [2021-06-05 23:36:15,279 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 7453 transitions. Word has length 28 [2021-06-05 23:36:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:15,279 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 7453 transitions. [2021-06-05 23:36:15,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 7453 transitions. [2021-06-05 23:36:15,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:15,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:15,281 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:15,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable666,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:15,482 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:15,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:15,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1830495825, now seen corresponding path program 152 times [2021-06-05 23:36:15,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:15,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538929216] [2021-06-05 23:36:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:15,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:15,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538929216] [2021-06-05 23:36:15,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538929216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:15,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584545743] [2021-06-05 23:36:15,805 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:15,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:15,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:15,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:36:15,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:16,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584545743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:16,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:16,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:16,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974897959] [2021-06-05 23:36:16,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:16,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:16,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:16,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:16,684 INFO L87 Difference]: Start difference. First operand 1627 states and 7453 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:17,265 INFO L93 Difference]: Finished difference Result 1665 states and 7539 transitions. [2021-06-05 23:36:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:36:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:17,268 INFO L225 Difference]: With dead ends: 1665 [2021-06-05 23:36:17,268 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 23:36:17,268 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1441.1ms TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:36:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 23:36:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1631. [2021-06-05 23:36:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 4.5773006134969325) internal successors, (7461), 1630 states have internal predecessors, (7461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 7461 transitions. [2021-06-05 23:36:17,289 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 7461 transitions. Word has length 28 [2021-06-05 23:36:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:17,289 INFO L482 AbstractCegarLoop]: Abstraction has 1631 states and 7461 transitions. [2021-06-05 23:36:17,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 7461 transitions. [2021-06-05 23:36:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:17,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:17,291 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:17,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable667,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:17,492 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:17,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191923, now seen corresponding path program 153 times [2021-06-05 23:36:17,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:17,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597729963] [2021-06-05 23:36:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:17,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:17,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597729963] [2021-06-05 23:36:17,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597729963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:17,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780440865] [2021-06-05 23:36:17,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:17,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:36:17,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:18,302 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:36:18,644 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:18,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780440865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:18,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:18,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:18,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269326244] [2021-06-05 23:36:18,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:18,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:18,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:18,645 INFO L87 Difference]: Start difference. First operand 1631 states and 7461 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:19,209 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 23:36:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:19,372 INFO L93 Difference]: Finished difference Result 1696 states and 7604 transitions. [2021-06-05 23:36:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:36:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:19,376 INFO L225 Difference]: With dead ends: 1696 [2021-06-05 23:36:19,376 INFO L226 Difference]: Without dead ends: 1692 [2021-06-05 23:36:19,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1487.5ms TimeCoverageRelationStatistics Valid=168, Invalid=1392, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:36:19,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-06-05 23:36:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1622. [2021-06-05 23:36:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1621 states have (on average 4.586057988895743) internal successors, (7434), 1621 states have internal predecessors, (7434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 7434 transitions. [2021-06-05 23:36:19,398 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 7434 transitions. Word has length 28 [2021-06-05 23:36:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:19,398 INFO L482 AbstractCegarLoop]: Abstraction has 1622 states and 7434 transitions. [2021-06-05 23:36:19,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 7434 transitions. [2021-06-05 23:36:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:19,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:19,401 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:19,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable672 [2021-06-05 23:36:19,601 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:19,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:19,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2138980049, now seen corresponding path program 154 times [2021-06-05 23:36:19,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:19,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326346251] [2021-06-05 23:36:19,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:19,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:19,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326346251] [2021-06-05 23:36:19,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326346251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:19,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410044715] [2021-06-05 23:36:19,834 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:19,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:19,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:19,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:19,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:20,437 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:36:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:20,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410044715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:20,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:20,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:20,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671785508] [2021-06-05 23:36:20,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:20,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:20,852 INFO L87 Difference]: Start difference. First operand 1622 states and 7434 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:21,469 INFO L93 Difference]: Finished difference Result 1654 states and 7498 transitions. [2021-06-05 23:36:21,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:21,469 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:21,473 INFO L225 Difference]: With dead ends: 1654 [2021-06-05 23:36:21,473 INFO L226 Difference]: Without dead ends: 1650 [2021-06-05 23:36:21,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1346.6ms TimeCoverageRelationStatistics Valid=109, Invalid=1013, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:36:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-06-05 23:36:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1618. [2021-06-05 23:36:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 4.587507730364873) internal successors, (7418), 1617 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 7418 transitions. [2021-06-05 23:36:21,497 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 7418 transitions. Word has length 28 [2021-06-05 23:36:21,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:21,497 INFO L482 AbstractCegarLoop]: Abstraction has 1618 states and 7418 transitions. [2021-06-05 23:36:21,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:21,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 7418 transitions. [2021-06-05 23:36:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:21,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:21,500 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:21,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:21,700 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash -196758805, now seen corresponding path program 155 times [2021-06-05 23:36:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:21,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383345534] [2021-06-05 23:36:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:21,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:21,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383345534] [2021-06-05 23:36:21,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383345534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:21,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453339529] [2021-06-05 23:36:21,902 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:21,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:36:21,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:21,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:21,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:22,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453339529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:22,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:22,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:22,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131202564] [2021-06-05 23:36:22,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:22,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:22,812 INFO L87 Difference]: Start difference. First operand 1618 states and 7418 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:23,012 INFO L93 Difference]: Finished difference Result 1650 states and 7490 transitions. [2021-06-05 23:36:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:36:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:23,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:23,016 INFO L225 Difference]: With dead ends: 1650 [2021-06-05 23:36:23,016 INFO L226 Difference]: Without dead ends: 1646 [2021-06-05 23:36:23,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 904.3ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-06-05 23:36:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1610. [2021-06-05 23:36:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 4.599129894344313) internal successors, (7400), 1609 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 7400 transitions. [2021-06-05 23:36:23,039 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 7400 transitions. Word has length 28 [2021-06-05 23:36:23,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:23,039 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 7400 transitions. [2021-06-05 23:36:23,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:23,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 7400 transitions. [2021-06-05 23:36:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:23,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:23,041 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:23,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 23:36:23,242 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1332363625, now seen corresponding path program 156 times [2021-06-05 23:36:23,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:23,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923697881] [2021-06-05 23:36:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:23,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:23,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923697881] [2021-06-05 23:36:23,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923697881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:23,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21687730] [2021-06-05 23:36:23,399 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:23,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:36:23,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:23,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:36:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:24,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21687730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:24,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:24,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:36:24,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232270564] [2021-06-05 23:36:24,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:36:24,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:24,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:36:24,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:36:24,107 INFO L87 Difference]: Start difference. First operand 1610 states and 7400 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:24,462 INFO L93 Difference]: Finished difference Result 1574 states and 7191 transitions. [2021-06-05 23:36:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:36:24,462 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:24,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:24,465 INFO L225 Difference]: With dead ends: 1574 [2021-06-05 23:36:24,465 INFO L226 Difference]: Without dead ends: 1559 [2021-06-05 23:36:24,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 781.1ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:36:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2021-06-05 23:36:24,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1531. [2021-06-05 23:36:24,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 4.633986928104576) internal successors, (7090), 1530 states have internal predecessors, (7090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 7090 transitions. [2021-06-05 23:36:24,485 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 7090 transitions. Word has length 28 [2021-06-05 23:36:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:24,485 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 7090 transitions. [2021-06-05 23:36:24,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 7090 transitions. [2021-06-05 23:36:24,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:24,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:24,487 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:24,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-06-05 23:36:24,688 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2110291579, now seen corresponding path program 157 times [2021-06-05 23:36:24,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:24,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169398253] [2021-06-05 23:36:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:24,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169398253] [2021-06-05 23:36:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169398253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527807849] [2021-06-05 23:36:24,956 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:24,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:36:24,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:25,551 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:36:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:25,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527807849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:25,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:25,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:25,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16169673] [2021-06-05 23:36:25,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:25,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:25,920 INFO L87 Difference]: Start difference. First operand 1531 states and 7090 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:26,488 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 23:36:26,658 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 23:36:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:26,745 INFO L93 Difference]: Finished difference Result 1578 states and 7201 transitions. [2021-06-05 23:36:26,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:36:26,746 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:26,748 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 23:36:26,748 INFO L226 Difference]: Without dead ends: 1574 [2021-06-05 23:36:26,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1611.1ms TimeCoverageRelationStatistics Valid=140, Invalid=1342, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:36:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2021-06-05 23:36:26,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1538. [2021-06-05 23:36:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 4.62654521795706) internal successors, (7111), 1537 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:26,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 7111 transitions. [2021-06-05 23:36:26,771 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 7111 transitions. Word has length 28 [2021-06-05 23:36:26,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:26,771 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 7111 transitions. [2021-06-05 23:36:26,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 7111 transitions. [2021-06-05 23:36:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:26,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:26,774 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:26,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 23:36:26,974 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1647182861, now seen corresponding path program 158 times [2021-06-05 23:36:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:26,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288422511] [2021-06-05 23:36:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:27,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:27,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288422511] [2021-06-05 23:36:27,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288422511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:27,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844246683] [2021-06-05 23:36:27,231 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:27,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:27,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:27,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:36:27,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:27,785 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:36:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:28,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844246683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:28,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:28,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:28,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689782363] [2021-06-05 23:36:28,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:28,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:28,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:28,277 INFO L87 Difference]: Start difference. First operand 1538 states and 7111 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:29,070 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-06-05 23:36:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:29,279 INFO L93 Difference]: Finished difference Result 1586 states and 7223 transitions. [2021-06-05 23:36:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:36:29,280 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:29,282 INFO L225 Difference]: With dead ends: 1586 [2021-06-05 23:36:29,282 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 23:36:29,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1827.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:36:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 23:36:29,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1544. [2021-06-05 23:36:29,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 4.620868438107583) internal successors, (7130), 1543 states have internal predecessors, (7130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 7130 transitions. [2021-06-05 23:36:29,303 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 7130 transitions. Word has length 28 [2021-06-05 23:36:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:29,303 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 7130 transitions. [2021-06-05 23:36:29,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 7130 transitions. [2021-06-05 23:36:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:29,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:29,305 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:29,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 23:36:29,506 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:29,506 INFO L82 PathProgramCache]: Analyzing trace with hash -53750163, now seen corresponding path program 159 times [2021-06-05 23:36:29,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:29,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757174028] [2021-06-05 23:36:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:29,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757174028] [2021-06-05 23:36:29,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757174028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722607113] [2021-06-05 23:36:29,663 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:29,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:36:29,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:29,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:36:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:30,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722607113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:30,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:30,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:36:30,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760349869] [2021-06-05 23:36:30,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:36:30,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:30,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:36:30,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:36:30,217 INFO L87 Difference]: Start difference. First operand 1544 states and 7130 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:30,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:30,616 INFO L93 Difference]: Finished difference Result 1511 states and 6853 transitions. [2021-06-05 23:36:30,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:36:30,616 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:30,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:30,619 INFO L225 Difference]: With dead ends: 1511 [2021-06-05 23:36:30,619 INFO L226 Difference]: Without dead ends: 1493 [2021-06-05 23:36:30,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 806.2ms TimeCoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:36:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-06-05 23:36:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1466. [2021-06-05 23:36:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-06-05 23:36:30,638 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-06-05 23:36:30,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:30,638 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-06-05 23:36:30,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-06-05 23:36:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:30,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:30,640 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:30,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:30,841 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:30,841 INFO L82 PathProgramCache]: Analyzing trace with hash 798561929, now seen corresponding path program 160 times [2021-06-05 23:36:30,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:30,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255517394] [2021-06-05 23:36:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:31,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:31,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255517394] [2021-06-05 23:36:31,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255517394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:31,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160716643] [2021-06-05 23:36:31,034 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:31,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:31,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:31,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:36:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:31,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160716643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:31,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:31,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:31,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797325789] [2021-06-05 23:36:31,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:31,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:31,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:31,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:31,737 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:32,007 INFO L93 Difference]: Finished difference Result 1512 states and 6853 transitions. [2021-06-05 23:36:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:36:32,008 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:32,010 INFO L225 Difference]: With dead ends: 1512 [2021-06-05 23:36:32,010 INFO L226 Difference]: Without dead ends: 1508 [2021-06-05 23:36:32,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 773.5ms TimeCoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:32,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-06-05 23:36:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1468. [2021-06-05 23:36:32,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 4.5998636673483295) internal successors, (6748), 1467 states have internal predecessors, (6748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 6748 transitions. [2021-06-05 23:36:32,029 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 6748 transitions. Word has length 28 [2021-06-05 23:36:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:32,029 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 6748 transitions. [2021-06-05 23:36:32,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 6748 transitions. [2021-06-05 23:36:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:32,031 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:32,031 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:32,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable708,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:32,232 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1757016913, now seen corresponding path program 161 times [2021-06-05 23:36:32,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:32,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347072304] [2021-06-05 23:36:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:32,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347072304] [2021-06-05 23:36:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347072304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:32,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484187492] [2021-06-05 23:36:32,422 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:32,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:36:32,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:32,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:33,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484187492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:33,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:33,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:33,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212825475] [2021-06-05 23:36:33,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:33,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:33,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:33,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:33,231 INFO L87 Difference]: Start difference. First operand 1468 states and 6748 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:33,633 INFO L93 Difference]: Finished difference Result 1517 states and 6862 transitions. [2021-06-05 23:36:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:36:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:33,637 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 23:36:33,637 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 23:36:33,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:36:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 23:36:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-06-05 23:36:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.602730375426622) internal successors, (6743), 1465 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6743 transitions. [2021-06-05 23:36:33,673 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6743 transitions. Word has length 28 [2021-06-05 23:36:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:33,673 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6743 transitions. [2021-06-05 23:36:33,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6743 transitions. [2021-06-05 23:36:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:33,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:33,675 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:33,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable710,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:33,876 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:33,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:33,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1425884241, now seen corresponding path program 162 times [2021-06-05 23:36:33,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:33,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362666478] [2021-06-05 23:36:33,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:34,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:34,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362666478] [2021-06-05 23:36:34,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362666478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:34,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438901125] [2021-06-05 23:36:34,112 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:34,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:36:34,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:34,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:34,795 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:34,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438901125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:34,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:34,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965395022] [2021-06-05 23:36:34,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:34,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:34,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:34,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:34,796 INFO L87 Difference]: Start difference. First operand 1466 states and 6743 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:35,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:35,424 INFO L93 Difference]: Finished difference Result 1519 states and 6864 transitions. [2021-06-05 23:36:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 23:36:35,425 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:35,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:35,427 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 23:36:35,427 INFO L226 Difference]: Without dead ends: 1515 [2021-06-05 23:36:35,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1195.8ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:36:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-06-05 23:36:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1466. [2021-06-05 23:36:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:35,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-06-05 23:36:35,446 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-06-05 23:36:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:35,446 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-06-05 23:36:35,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-06-05 23:36:35,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:35,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:35,448 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:35,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable714,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:35,649 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1167088917, now seen corresponding path program 163 times [2021-06-05 23:36:35,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:35,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261044865] [2021-06-05 23:36:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:35,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261044865] [2021-06-05 23:36:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261044865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164015063] [2021-06-05 23:36:35,841 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:35,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:36:35,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:36,320 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 23:36:36,795 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:36,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164015063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:36,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:36,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:36,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354904028] [2021-06-05 23:36:36,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:36,796 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:37,262 INFO L93 Difference]: Finished difference Result 1517 states and 6858 transitions. [2021-06-05 23:36:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:36:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:37,265 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 23:36:37,265 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 23:36:37,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1148.4ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 23:36:37,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 23:36:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1466. [2021-06-05 23:36:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1466 states, 1465 states have (on average 4.6) internal successors, (6739), 1465 states have internal predecessors, (6739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 6739 transitions. [2021-06-05 23:36:37,283 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 6739 transitions. Word has length 28 [2021-06-05 23:36:37,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:37,284 INFO L482 AbstractCegarLoop]: Abstraction has 1466 states and 6739 transitions. [2021-06-05 23:36:37,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 6739 transitions. [2021-06-05 23:36:37,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:37,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:37,286 INFO L554 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:37,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:37,486 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:37,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1768583857, now seen corresponding path program 164 times [2021-06-05 23:36:37,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:37,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199654016] [2021-06-05 23:36:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:37,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:37,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199654016] [2021-06-05 23:36:37,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199654016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:37,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690970842] [2021-06-05 23:36:37,729 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:37,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:36:37,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:36:37,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:36:38,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690970842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:38,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:38,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 23:36:38,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605956805] [2021-06-05 23:36:38,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:36:38,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:36:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:36:38,367 INFO L87 Difference]: Start difference. First operand 1466 states and 6739 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:38,878 INFO L93 Difference]: Finished difference Result 1192 states and 5241 transitions. [2021-06-05 23:36:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:36:38,878 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:38,880 INFO L225 Difference]: With dead ends: 1192 [2021-06-05 23:36:38,880 INFO L226 Difference]: Without dead ends: 1168 [2021-06-05 23:36:38,880 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1009.9ms TimeCoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:36:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-05 23:36:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1151. [2021-06-05 23:36:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1150 states have (on average 4.472173913043478) internal successors, (5143), 1150 states have internal predecessors, (5143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 5143 transitions. [2021-06-05 23:36:38,894 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 5143 transitions. Word has length 28 [2021-06-05 23:36:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:38,894 INFO L482 AbstractCegarLoop]: Abstraction has 1151 states and 5143 transitions. [2021-06-05 23:36:38,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 5143 transitions. [2021-06-05 23:36:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:38,895 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:38,895 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:39,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:39,096 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:39,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:39,096 INFO L82 PathProgramCache]: Analyzing trace with hash 108442159, now seen corresponding path program 165 times [2021-06-05 23:36:39,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:39,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080276580] [2021-06-05 23:36:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:39,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:39,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080276580] [2021-06-05 23:36:39,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080276580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:39,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448569825] [2021-06-05 23:36:39,434 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:39,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:36:39,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:36:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:40,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448569825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:40,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:40,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:40,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658006420] [2021-06-05 23:36:40,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:40,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:40,530 INFO L87 Difference]: Start difference. First operand 1151 states and 5143 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:41,162 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-06-05 23:36:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:41,274 INFO L93 Difference]: Finished difference Result 1185 states and 5217 transitions. [2021-06-05 23:36:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:36:41,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:41,276 INFO L225 Difference]: With dead ends: 1185 [2021-06-05 23:36:41,276 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 23:36:41,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1673.8ms TimeCoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:36:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 23:36:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1145. [2021-06-05 23:36:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 4.481643356643357) internal successors, (5127), 1144 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:41,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 5127 transitions. [2021-06-05 23:36:41,290 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 5127 transitions. Word has length 28 [2021-06-05 23:36:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:41,290 INFO L482 AbstractCegarLoop]: Abstraction has 1145 states and 5127 transitions. [2021-06-05 23:36:41,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 5127 transitions. [2021-06-05 23:36:41,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:41,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:41,291 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:41,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable727,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:41,492 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:41,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:41,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1805090615, now seen corresponding path program 166 times [2021-06-05 23:36:41,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:41,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959484808] [2021-06-05 23:36:41,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:41,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:41,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959484808] [2021-06-05 23:36:41,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959484808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:41,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858530624] [2021-06-05 23:36:41,704 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:41,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:36:41,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:36:41,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:42,285 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:36:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:42,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858530624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:42,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:42,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:36:42,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833252461] [2021-06-05 23:36:42,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:36:42,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:42,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:36:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:36:42,643 INFO L87 Difference]: Start difference. First operand 1145 states and 5127 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:43,161 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-06-05 23:36:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:43,287 INFO L93 Difference]: Finished difference Result 1180 states and 5202 transitions. [2021-06-05 23:36:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:36:43,287 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 23:36:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:43,289 INFO L225 Difference]: With dead ends: 1180 [2021-06-05 23:36:43,289 INFO L226 Difference]: Without dead ends: 1176 [2021-06-05 23:36:43,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1364.6ms TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 23:36:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-05 23:36:43,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1135. [2021-06-05 23:36:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1134 states have (on average 4.493827160493828) internal successors, (5096), 1134 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 5096 transitions. [2021-06-05 23:36:43,302 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 5096 transitions. Word has length 28 [2021-06-05 23:36:43,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:43,303 INFO L482 AbstractCegarLoop]: Abstraction has 1135 states and 5096 transitions. [2021-06-05 23:36:43,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 5096 transitions. [2021-06-05 23:36:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 23:36:43,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:43,304 INFO L554 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:43,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:43,505 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1952383825, now seen corresponding path program 167 times [2021-06-05 23:36:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:43,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786893689] [2021-06-05 23:36:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:43,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786893689] [2021-06-05 23:36:43,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786893689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:43,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080330114] [2021-06-05 23:36:43,754 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:43,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:36:43,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:36:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:44,400 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 23:36:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:36:44,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080330114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:44,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:36:44,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:36:44,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980745434] [2021-06-05 23:36:44,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:36:44,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:36:44,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:36:44,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:36:44,827 INFO L87 Difference]: Start difference. First operand 1135 states and 5096 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:45,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:36:45,540 INFO L93 Difference]: Finished difference Result 1168 states and 5162 transitions. [2021-06-05 23:36:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:36:45,540 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 28 [2021-06-05 23:36:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:36:45,542 INFO L225 Difference]: With dead ends: 1168 [2021-06-05 23:36:45,542 INFO L226 Difference]: Without dead ends: 1164 [2021-06-05 23:36:45,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1511.1ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:36:45,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-06-05 23:36:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1112. [2021-06-05 23:36:45,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 4.53015301530153) internal successors, (5033), 1111 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:36:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 5033 transitions. [2021-06-05 23:36:45,569 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 5033 transitions. Word has length 28 [2021-06-05 23:36:45,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:36:45,569 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 5033 transitions. [2021-06-05 23:36:45,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 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 23:36:45,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 5033 transitions. [2021-06-05 23:36:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:36:45,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:36:45,571 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:36:45,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 23:36:45,771 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:36:45,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:36:45,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1451861432, now seen corresponding path program 168 times [2021-06-05 23:36:45,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:36:45,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044226336] [2021-06-05 23:36:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:36:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:36:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:36:45,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:36:45,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044226336] [2021-06-05 23:36:45,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044226336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:36:45,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577996614] [2021-06-05 23:36:45,924 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:36:45,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:36:45,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:36:45,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:36:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:36:46,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:36:46,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:46,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:46,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:36:46,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:46,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:46,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:36:46,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:46,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:46,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:36:46,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:36:46,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:36:46,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:36:46,432 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:123, output treesize:95 [2021-06-05 23:37:02,838 WARN L205 SmtUtils]: Spent 16.08 s on a formula simplification that was a NOOP. DAG size: 57 [2021-06-05 23:37:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:02,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577996614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:02,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:02,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-05 23:37:02,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730814752] [2021-06-05 23:37:02,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:37:02,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:37:02,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:37:02,852 INFO L87 Difference]: Start difference. First operand 1112 states and 5033 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:03,189 INFO L93 Difference]: Finished difference Result 2488 states and 10938 transitions. [2021-06-05 23:37:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:37:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 23:37:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:03,194 INFO L225 Difference]: With dead ends: 2488 [2021-06-05 23:37:03,194 INFO L226 Difference]: Without dead ends: 2422 [2021-06-05 23:37:03,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 16743.3ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:37:03,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-06-05 23:37:03,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1684. [2021-06-05 23:37:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 4.7260843731431965) internal successors, (7954), 1683 states have internal predecessors, (7954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 7954 transitions. [2021-06-05 23:37:03,221 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 7954 transitions. Word has length 29 [2021-06-05 23:37:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:03,221 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 7954 transitions. [2021-06-05 23:37:03,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 7954 transitions. [2021-06-05 23:37:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:03,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:03,223 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:03,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable750 [2021-06-05 23:37:03,424 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:03,424 INFO L82 PathProgramCache]: Analyzing trace with hash -462072546, now seen corresponding path program 169 times [2021-06-05 23:37:03,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:03,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404434712] [2021-06-05 23:37:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:03,696 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:03,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:03,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404434712] [2021-06-05 23:37:03,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404434712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:03,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885295600] [2021-06-05 23:37:03,696 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:37:03,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:04,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885295600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:04,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:04,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:04,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624506369] [2021-06-05 23:37:04,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:04,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:04,599 INFO L87 Difference]: Start difference. First operand 1684 states and 7954 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:04,922 INFO L93 Difference]: Finished difference Result 1831 states and 8338 transitions. [2021-06-05 23:37:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:37:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:04,926 INFO L225 Difference]: With dead ends: 1831 [2021-06-05 23:37:04,926 INFO L226 Difference]: Without dead ends: 1814 [2021-06-05 23:37:04,926 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1093.3ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:37:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2021-06-05 23:37:04,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1728. [2021-06-05 23:37:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 4.672264041690793) internal successors, (8069), 1727 states have internal predecessors, (8069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 8069 transitions. [2021-06-05 23:37:04,949 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 8069 transitions. Word has length 29 [2021-06-05 23:37:04,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:04,949 INFO L482 AbstractCegarLoop]: Abstraction has 1728 states and 8069 transitions. [2021-06-05 23:37:04,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:04,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 8069 transitions. [2021-06-05 23:37:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:04,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:04,952 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:05,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-06-05 23:37:05,153 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:05,153 INFO L82 PathProgramCache]: Analyzing trace with hash 347953604, now seen corresponding path program 170 times [2021-06-05 23:37:05,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:05,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598573030] [2021-06-05 23:37:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:05,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:05,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598573030] [2021-06-05 23:37:05,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598573030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:05,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615843219] [2021-06-05 23:37:05,470 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:05,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:37:05,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:05,970 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 23:37:06,180 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 23:37:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:06,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615843219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:06,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:06,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:06,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803057266] [2021-06-05 23:37:06,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:06,621 INFO L87 Difference]: Start difference. First operand 1728 states and 8069 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:07,456 INFO L93 Difference]: Finished difference Result 1769 states and 8177 transitions. [2021-06-05 23:37:07,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:37:07,457 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:07,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:07,460 INFO L225 Difference]: With dead ends: 1769 [2021-06-05 23:37:07,460 INFO L226 Difference]: Without dead ends: 1762 [2021-06-05 23:37:07,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1785.1ms TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:37:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2021-06-05 23:37:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1751. [2021-06-05 23:37:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 4.646857142857143) internal successors, (8132), 1750 states have internal predecessors, (8132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 8132 transitions. [2021-06-05 23:37:07,483 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 8132 transitions. Word has length 29 [2021-06-05 23:37:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:07,483 INFO L482 AbstractCegarLoop]: Abstraction has 1751 states and 8132 transitions. [2021-06-05 23:37:07,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:07,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 8132 transitions. [2021-06-05 23:37:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:07,486 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:07,486 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:07,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 23:37:07,686 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash 865544252, now seen corresponding path program 171 times [2021-06-05 23:37:07,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:07,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469608489] [2021-06-05 23:37:07,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:08,029 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:08,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:08,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469608489] [2021-06-05 23:37:08,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469608489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:08,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102582012] [2021-06-05 23:37:08,030 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:08,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:37:08,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:08,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:08,562 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:37:08,748 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-05 23:37:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:09,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102582012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:09,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:09,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:09,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086667996] [2021-06-05 23:37:09,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:09,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:09,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:09,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:09,105 INFO L87 Difference]: Start difference. First operand 1751 states and 8132 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:09,662 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 23:37:10,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:10,027 INFO L93 Difference]: Finished difference Result 1810 states and 8279 transitions. [2021-06-05 23:37:10,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:37:10,028 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:10,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:10,031 INFO L225 Difference]: With dead ends: 1810 [2021-06-05 23:37:10,031 INFO L226 Difference]: Without dead ends: 1798 [2021-06-05 23:37:10,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1844.0ms TimeCoverageRelationStatistics Valid=157, Invalid=1483, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:37:10,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2021-06-05 23:37:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1769. [2021-06-05 23:37:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1768 states have (on average 4.628393665158371) internal successors, (8183), 1768 states have internal predecessors, (8183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 8183 transitions. [2021-06-05 23:37:10,054 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 8183 transitions. Word has length 29 [2021-06-05 23:37:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:10,054 INFO L482 AbstractCegarLoop]: Abstraction has 1769 states and 8183 transitions. [2021-06-05 23:37:10,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 8183 transitions. [2021-06-05 23:37:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:10,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:10,056 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:10,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable765,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:10,257 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 328099136, now seen corresponding path program 172 times [2021-06-05 23:37:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:10,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762860629] [2021-06-05 23:37:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:10,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:10,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762860629] [2021-06-05 23:37:10,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762860629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:10,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142041074] [2021-06-05 23:37:10,582 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:10,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:10,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:37:10,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:11,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142041074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:11,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:11,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:11,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999262911] [2021-06-05 23:37:11,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:11,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:11,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:11,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:11,190 INFO L87 Difference]: Start difference. First operand 1769 states and 8183 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:12,285 INFO L93 Difference]: Finished difference Result 2432 states and 10664 transitions. [2021-06-05 23:37:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:37:12,286 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:12,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:12,290 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 23:37:12,290 INFO L226 Difference]: Without dead ends: 2349 [2021-06-05 23:37:12,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1544.0ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:37:12,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-06-05 23:37:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 1981. [2021-06-05 23:37:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 4.653030303030303) internal successors, (9213), 1980 states have internal predecessors, (9213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:12,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 9213 transitions. [2021-06-05 23:37:12,319 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 9213 transitions. Word has length 29 [2021-06-05 23:37:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:12,319 INFO L482 AbstractCegarLoop]: Abstraction has 1981 states and 9213 transitions. [2021-06-05 23:37:12,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 9213 transitions. [2021-06-05 23:37:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:12,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:12,322 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:12,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:12,522 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:12,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1585433638, now seen corresponding path program 173 times [2021-06-05 23:37:12,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:12,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382772358] [2021-06-05 23:37:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:13,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:13,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382772358] [2021-06-05 23:37:13,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382772358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:13,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009893127] [2021-06-05 23:37:13,032 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:13,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:37:13,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:13,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009893127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:13,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:13,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:13,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343789187] [2021-06-05 23:37:13,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:13,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:13,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:13,897 INFO L87 Difference]: Start difference. First operand 1981 states and 9213 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:15,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:15,202 INFO L93 Difference]: Finished difference Result 2286 states and 10241 transitions. [2021-06-05 23:37:15,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:37:15,203 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:15,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:15,207 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 23:37:15,207 INFO L226 Difference]: Without dead ends: 2194 [2021-06-05 23:37:15,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1983.4ms TimeCoverageRelationStatistics Valid=261, Invalid=1901, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:37:15,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-06-05 23:37:15,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2066. [2021-06-05 23:37:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.632445520581114) internal successors, (9566), 2065 states have internal predecessors, (9566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 9566 transitions. [2021-06-05 23:37:15,234 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 9566 transitions. Word has length 29 [2021-06-05 23:37:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:15,235 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 9566 transitions. [2021-06-05 23:37:15,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 9566 transitions. [2021-06-05 23:37:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:15,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:15,237 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:15,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:15,438 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:15,438 INFO L82 PathProgramCache]: Analyzing trace with hash 89744602, now seen corresponding path program 174 times [2021-06-05 23:37:15,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:15,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27130098] [2021-06-05 23:37:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:15,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:15,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27130098] [2021-06-05 23:37:15,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27130098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:15,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377203900] [2021-06-05 23:37:15,737 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:15,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:37:15,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:37:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:16,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377203900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:16,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:16,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:16,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656912430] [2021-06-05 23:37:16,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:16,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:16,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:16,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:16,527 INFO L87 Difference]: Start difference. First operand 2066 states and 9566 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:17,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:17,051 INFO L93 Difference]: Finished difference Result 2244 states and 10109 transitions. [2021-06-05 23:37:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:37:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:17,055 INFO L225 Difference]: With dead ends: 2244 [2021-06-05 23:37:17,055 INFO L226 Difference]: Without dead ends: 2232 [2021-06-05 23:37:17,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1121.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:37:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2021-06-05 23:37:17,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 2102. [2021-06-05 23:37:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2102 states, 2101 states have (on average 4.627796287482151) internal successors, (9723), 2101 states have internal predecessors, (9723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2102 states to 2102 states and 9723 transitions. [2021-06-05 23:37:17,085 INFO L78 Accepts]: Start accepts. Automaton has 2102 states and 9723 transitions. Word has length 29 [2021-06-05 23:37:17,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:17,085 INFO L482 AbstractCegarLoop]: Abstraction has 2102 states and 9723 transitions. [2021-06-05 23:37:17,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:17,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2102 states and 9723 transitions. [2021-06-05 23:37:17,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:17,088 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:17,088 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:17,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-05 23:37:17,288 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:17,288 INFO L82 PathProgramCache]: Analyzing trace with hash -477534946, now seen corresponding path program 175 times [2021-06-05 23:37:17,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:17,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980105670] [2021-06-05 23:37:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:17,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:17,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980105670] [2021-06-05 23:37:17,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980105670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:17,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422037260] [2021-06-05 23:37:17,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:17,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:37:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:18,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422037260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:18,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:18,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:18,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740762658] [2021-06-05 23:37:18,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:18,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:18,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:18,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:18,562 INFO L87 Difference]: Start difference. First operand 2102 states and 9723 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:19,643 INFO L93 Difference]: Finished difference Result 2144 states and 9820 transitions. [2021-06-05 23:37:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:37:19,643 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:19,647 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 23:37:19,647 INFO L226 Difference]: Without dead ends: 2132 [2021-06-05 23:37:19,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1850.8ms TimeCoverageRelationStatistics Valid=152, Invalid=1740, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:37:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2021-06-05 23:37:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 2103. [2021-06-05 23:37:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 4.627021883920076) internal successors, (9726), 2102 states have internal predecessors, (9726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 9726 transitions. [2021-06-05 23:37:19,673 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 9726 transitions. Word has length 29 [2021-06-05 23:37:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:19,674 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 9726 transitions. [2021-06-05 23:37:19,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 9726 transitions. [2021-06-05 23:37:19,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:19,676 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:19,676 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:19,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable778,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:19,877 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:19,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:19,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1199394428, now seen corresponding path program 176 times [2021-06-05 23:37:19,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:19,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500714891] [2021-06-05 23:37:19,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:20,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:20,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500714891] [2021-06-05 23:37:20,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500714891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:20,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777619595] [2021-06-05 23:37:20,178 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:20,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:20,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:20,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:37:20,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:21,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777619595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:21,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:21,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:21,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632616117] [2021-06-05 23:37:21,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:21,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:21,140 INFO L87 Difference]: Start difference. First operand 2103 states and 9726 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:21,655 INFO L93 Difference]: Finished difference Result 2149 states and 9838 transitions. [2021-06-05 23:37:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:37:21,655 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:21,659 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 23:37:21,659 INFO L226 Difference]: Without dead ends: 2142 [2021-06-05 23:37:21,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1310.9ms TimeCoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:37:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2021-06-05 23:37:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2114. [2021-06-05 23:37:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 4.613819214387127) internal successors, (9749), 2113 states have internal predecessors, (9749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 9749 transitions. [2021-06-05 23:37:21,687 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 9749 transitions. Word has length 29 [2021-06-05 23:37:21,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:21,687 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 9749 transitions. [2021-06-05 23:37:21,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:21,687 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 9749 transitions. [2021-06-05 23:37:21,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:21,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:21,689 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:21,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 23:37:21,890 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:21,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash -714138346, now seen corresponding path program 177 times [2021-06-05 23:37:21,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:21,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86370321] [2021-06-05 23:37:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:22,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:22,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86370321] [2021-06-05 23:37:22,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86370321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:22,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633627702] [2021-06-05 23:37:22,247 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:22,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:37:22,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:37:22,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:23,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633627702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:23,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:23,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641938126] [2021-06-05 23:37:23,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:23,059 INFO L87 Difference]: Start difference. First operand 2114 states and 9749 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:24,351 INFO L93 Difference]: Finished difference Result 2362 states and 10569 transitions. [2021-06-05 23:37:24,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:37:24,351 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:24,355 INFO L225 Difference]: With dead ends: 2362 [2021-06-05 23:37:24,355 INFO L226 Difference]: Without dead ends: 2294 [2021-06-05 23:37:24,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1918.7ms TimeCoverageRelationStatistics Valid=322, Invalid=2030, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:37:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-06-05 23:37:24,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2155. [2021-06-05 23:37:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 4.589136490250697) internal successors, (9885), 2154 states have internal predecessors, (9885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 9885 transitions. [2021-06-05 23:37:24,387 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 9885 transitions. Word has length 29 [2021-06-05 23:37:24,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:24,387 INFO L482 AbstractCegarLoop]: Abstraction has 2155 states and 9885 transitions. [2021-06-05 23:37:24,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 9885 transitions. [2021-06-05 23:37:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:24,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:24,390 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:24,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 23:37:24,591 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash 961039894, now seen corresponding path program 178 times [2021-06-05 23:37:24,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:24,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363922440] [2021-06-05 23:37:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:24,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:24,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363922440] [2021-06-05 23:37:24,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363922440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:24,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682524247] [2021-06-05 23:37:24,880 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:24,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:24,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:24,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:37:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:25,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682524247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:25,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:25,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:25,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238842188] [2021-06-05 23:37:25,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:25,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:25,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:25,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:25,545 INFO L87 Difference]: Start difference. First operand 2155 states and 9885 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:25,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:25,862 INFO L93 Difference]: Finished difference Result 2204 states and 10013 transitions. [2021-06-05 23:37:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:37:25,863 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:25,866 INFO L225 Difference]: With dead ends: 2204 [2021-06-05 23:37:25,866 INFO L226 Difference]: Without dead ends: 2197 [2021-06-05 23:37:25,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 838.5ms TimeCoverageRelationStatistics Valid=94, Invalid=962, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:37:25,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-06-05 23:37:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 2167. [2021-06-05 23:37:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2166 states have (on average 4.577562326869806) internal successors, (9915), 2166 states have internal predecessors, (9915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 9915 transitions. [2021-06-05 23:37:25,910 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 9915 transitions. Word has length 29 [2021-06-05 23:37:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:25,910 INFO L482 AbstractCegarLoop]: Abstraction has 2167 states and 9915 transitions. [2021-06-05 23:37:25,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:25,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 9915 transitions. [2021-06-05 23:37:25,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:25,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:25,913 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:26,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable791,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:26,114 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash 393760346, now seen corresponding path program 179 times [2021-06-05 23:37:26,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:26,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32020008] [2021-06-05 23:37:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:26,444 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:26,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:26,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32020008] [2021-06-05 23:37:26,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32020008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:26,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825392965] [2021-06-05 23:37:26,445 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:26,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:37:26,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:26,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:37:26,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:27,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825392965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:27,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:27,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:27,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247051651] [2021-06-05 23:37:27,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:27,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:27,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:27,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:27,208 INFO L87 Difference]: Start difference. First operand 2167 states and 9915 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:28,015 INFO L93 Difference]: Finished difference Result 2306 states and 10326 transitions. [2021-06-05 23:37:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:37:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:28,019 INFO L225 Difference]: With dead ends: 2306 [2021-06-05 23:37:28,019 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 23:37:28,020 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1404.2ms TimeCoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:37:28,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 23:37:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2187. [2021-06-05 23:37:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2186 states have (on average 4.562671546203111) internal successors, (9974), 2186 states have internal predecessors, (9974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:28,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9974 transitions. [2021-06-05 23:37:28,046 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9974 transitions. Word has length 29 [2021-06-05 23:37:28,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:28,046 INFO L482 AbstractCegarLoop]: Abstraction has 2187 states and 9974 transitions. [2021-06-05 23:37:28,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:28,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9974 transitions. [2021-06-05 23:37:28,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:28,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:28,049 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:28,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable792 [2021-06-05 23:37:28,249 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:28,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:28,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1672037662, now seen corresponding path program 180 times [2021-06-05 23:37:28,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:28,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442693446] [2021-06-05 23:37:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:28,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:28,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442693446] [2021-06-05 23:37:28,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442693446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:28,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265083669] [2021-06-05 23:37:28,622 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:28,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:37:28,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:28,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:28,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:29,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265083669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:29,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:29,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:29,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73715435] [2021-06-05 23:37:29,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:29,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:29,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:29,506 INFO L87 Difference]: Start difference. First operand 2187 states and 9974 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:30,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:30,428 INFO L93 Difference]: Finished difference Result 2348 states and 10539 transitions. [2021-06-05 23:37:30,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:37:30,428 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:30,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:30,432 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 23:37:30,432 INFO L226 Difference]: Without dead ends: 2316 [2021-06-05 23:37:30,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1706.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:37:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-05 23:37:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2243. [2021-06-05 23:37:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 4.558876003568242) internal successors, (10221), 2242 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 10221 transitions. [2021-06-05 23:37:30,461 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 10221 transitions. Word has length 29 [2021-06-05 23:37:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:30,461 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 10221 transitions. [2021-06-05 23:37:30,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 10221 transitions. [2021-06-05 23:37:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:30,464 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:30,465 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:30,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable795 [2021-06-05 23:37:30,665 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1266240858, now seen corresponding path program 181 times [2021-06-05 23:37:30,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:30,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353338017] [2021-06-05 23:37:30,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:31,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:31,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353338017] [2021-06-05 23:37:31,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353338017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:31,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119047773] [2021-06-05 23:37:31,087 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:31,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:37:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:31,647 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:37:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:32,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119047773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:32,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:32,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:32,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512383831] [2021-06-05 23:37:32,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:32,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:32,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:32,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:32,021 INFO L87 Difference]: Start difference. First operand 2243 states and 10221 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:32,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:32,774 INFO L93 Difference]: Finished difference Result 2425 states and 10774 transitions. [2021-06-05 23:37:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:37:32,774 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:32,778 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 23:37:32,778 INFO L226 Difference]: Without dead ends: 2413 [2021-06-05 23:37:32,779 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1540.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:37:32,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-05 23:37:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2246. [2021-06-05 23:37:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2246 states, 2245 states have (on average 4.564810690423163) internal successors, (10248), 2245 states have internal predecessors, (10248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 10248 transitions. [2021-06-05 23:37:32,809 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 10248 transitions. Word has length 29 [2021-06-05 23:37:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:32,809 INFO L482 AbstractCegarLoop]: Abstraction has 2246 states and 10248 transitions. [2021-06-05 23:37:32,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 10248 transitions. [2021-06-05 23:37:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:32,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:32,812 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:33,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:33,013 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash 698961310, now seen corresponding path program 182 times [2021-06-05 23:37:33,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:33,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362180364] [2021-06-05 23:37:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:33,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:33,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362180364] [2021-06-05 23:37:33,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362180364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:33,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292318254] [2021-06-05 23:37:33,282 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:33,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:33,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:33,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:34,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292318254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:34,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:34,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:34,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429111340] [2021-06-05 23:37:34,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:34,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:34,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:34,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:34,272 INFO L87 Difference]: Start difference. First operand 2246 states and 10248 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:35,009 INFO L93 Difference]: Finished difference Result 2282 states and 10326 transitions. [2021-06-05 23:37:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:37:35,010 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:35,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:35,014 INFO L225 Difference]: With dead ends: 2282 [2021-06-05 23:37:35,014 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 23:37:35,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1459.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:37:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 23:37:35,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2241. [2021-06-05 23:37:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 4.568303571428571) internal successors, (10233), 2240 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:35,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 10233 transitions. [2021-06-05 23:37:35,043 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 10233 transitions. Word has length 29 [2021-06-05 23:37:35,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:35,044 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 10233 transitions. [2021-06-05 23:37:35,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:35,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 10233 transitions. [2021-06-05 23:37:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:35,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:35,047 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:35,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable804 [2021-06-05 23:37:35,247 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash 778277730, now seen corresponding path program 183 times [2021-06-05 23:37:35,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:35,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288666785] [2021-06-05 23:37:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:35,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288666785] [2021-06-05 23:37:35,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288666785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358828466] [2021-06-05 23:37:35,556 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:35,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:37:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:35,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:36,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358828466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:36,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:36,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:36,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685810796] [2021-06-05 23:37:36,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:36,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:36,528 INFO L87 Difference]: Start difference. First operand 2241 states and 10233 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:36,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:36,933 INFO L93 Difference]: Finished difference Result 2376 states and 10589 transitions. [2021-06-05 23:37:36,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:37:36,933 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:36,937 INFO L225 Difference]: With dead ends: 2376 [2021-06-05 23:37:36,937 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 23:37:36,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1224.4ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:37:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 23:37:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2234. [2021-06-05 23:37:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 4.5763546798029555) internal successors, (10219), 2233 states have internal predecessors, (10219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 10219 transitions. [2021-06-05 23:37:36,973 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 10219 transitions. Word has length 29 [2021-06-05 23:37:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:36,973 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 10219 transitions. [2021-06-05 23:37:36,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 10219 transitions. [2021-06-05 23:37:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:36,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:36,977 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:37,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable810,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:37,178 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:37,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:37,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1588303880, now seen corresponding path program 184 times [2021-06-05 23:37:37,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:37,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860249440] [2021-06-05 23:37:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:37,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:37,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860249440] [2021-06-05 23:37:37,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860249440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:37,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850430805] [2021-06-05 23:37:37,472 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:37,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:37,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:37,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:37:37,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:38,002 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:37:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:38,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850430805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:38,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:38,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:38,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755748087] [2021-06-05 23:37:38,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:38,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:38,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:38,349 INFO L87 Difference]: Start difference. First operand 2234 states and 10219 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:38,881 INFO L93 Difference]: Finished difference Result 2561 states and 11409 transitions. [2021-06-05 23:37:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:37:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:38,886 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 23:37:38,886 INFO L226 Difference]: Without dead ends: 2547 [2021-06-05 23:37:38,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1288.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:37:38,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2547 states. [2021-06-05 23:37:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2547 to 2320. [2021-06-05 23:37:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 4.567917205692108) internal successors, (10593), 2319 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 10593 transitions. [2021-06-05 23:37:38,919 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 10593 transitions. Word has length 29 [2021-06-05 23:37:38,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:38,919 INFO L482 AbstractCegarLoop]: Abstraction has 2320 states and 10593 transitions. [2021-06-05 23:37:38,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 10593 transitions. [2021-06-05 23:37:38,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:38,923 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:38,923 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:39,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-05 23:37:39,123 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:39,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2105894528, now seen corresponding path program 185 times [2021-06-05 23:37:39,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:39,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646608473] [2021-06-05 23:37:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:39,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:39,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:39,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646608473] [2021-06-05 23:37:39,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646608473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:39,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404985446] [2021-06-05 23:37:39,546 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:39,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:37:39,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:40,066 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:37:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:40,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404985446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:40,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:40,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:40,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549298361] [2021-06-05 23:37:40,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:40,574 INFO L87 Difference]: Start difference. First operand 2320 states and 10593 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:41,246 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 23:37:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:41,905 INFO L93 Difference]: Finished difference Result 2477 states and 11087 transitions. [2021-06-05 23:37:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:37:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:41,909 INFO L225 Difference]: With dead ends: 2477 [2021-06-05 23:37:41,910 INFO L226 Difference]: Without dead ends: 2467 [2021-06-05 23:37:41,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2137.2ms TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:37:41,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-06-05 23:37:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2342. [2021-06-05 23:37:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.553182400683468) internal successors, (10659), 2341 states have internal predecessors, (10659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10659 transitions. [2021-06-05 23:37:41,943 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10659 transitions. Word has length 29 [2021-06-05 23:37:41,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:41,943 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10659 transitions. [2021-06-05 23:37:41,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:41,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10659 transitions. [2021-06-05 23:37:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:41,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:41,946 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:42,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable819,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:42,147 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:42,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:42,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1568449412, now seen corresponding path program 186 times [2021-06-05 23:37:42,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:42,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361859411] [2021-06-05 23:37:42,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:42,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:42,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361859411] [2021-06-05 23:37:42,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361859411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:42,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43387186] [2021-06-05 23:37:42,418 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:42,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:37:42,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:37:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:43,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43387186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:43,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:43,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:43,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891943513] [2021-06-05 23:37:43,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:43,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:43,108 INFO L87 Difference]: Start difference. First operand 2342 states and 10659 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:43,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:43,591 INFO L93 Difference]: Finished difference Result 2387 states and 10797 transitions. [2021-06-05 23:37:43,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:37:43,592 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:43,596 INFO L225 Difference]: With dead ends: 2387 [2021-06-05 23:37:43,596 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 23:37:43,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 977.6ms TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:37:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 23:37:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 2340. [2021-06-05 23:37:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 2339 states have (on average 4.555365540829414) internal successors, (10655), 2339 states have internal predecessors, (10655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 10655 transitions. [2021-06-05 23:37:43,627 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 10655 transitions. Word has length 29 [2021-06-05 23:37:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:43,628 INFO L482 AbstractCegarLoop]: Abstraction has 2340 states and 10655 transitions. [2021-06-05 23:37:43,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 10655 transitions. [2021-06-05 23:37:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:43,631 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:43,631 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:43,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable825 [2021-06-05 23:37:43,831 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:43,831 INFO L82 PathProgramCache]: Analyzing trace with hash -345083362, now seen corresponding path program 187 times [2021-06-05 23:37:43,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:43,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692655919] [2021-06-05 23:37:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:44,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:44,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692655919] [2021-06-05 23:37:44,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692655919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:44,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706548271] [2021-06-05 23:37:44,131 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:44,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:37:44,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:45,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706548271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:45,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:45,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:45,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216005239] [2021-06-05 23:37:45,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:45,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:45,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:45,042 INFO L87 Difference]: Start difference. First operand 2340 states and 10655 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:45,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:45,616 INFO L93 Difference]: Finished difference Result 2400 states and 10829 transitions. [2021-06-05 23:37:45,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:37:45,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:45,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:45,621 INFO L225 Difference]: With dead ends: 2400 [2021-06-05 23:37:45,621 INFO L226 Difference]: Without dead ends: 2395 [2021-06-05 23:37:45,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1325.0ms TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:37:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-06-05 23:37:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2347. [2021-06-05 23:37:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 4.549872122762149) internal successors, (10674), 2346 states have internal predecessors, (10674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 10674 transitions. [2021-06-05 23:37:45,651 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 10674 transitions. Word has length 29 [2021-06-05 23:37:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:45,651 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 10674 transitions. [2021-06-05 23:37:45,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 10674 transitions. [2021-06-05 23:37:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:45,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:45,654 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:45,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:45,855 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:45,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:45,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1330094878, now seen corresponding path program 188 times [2021-06-05 23:37:45,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:45,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41438885] [2021-06-05 23:37:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:46,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:46,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41438885] [2021-06-05 23:37:46,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41438885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:46,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166509960] [2021-06-05 23:37:46,205 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:46,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:37:46,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:46,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:47,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166509960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:47,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:47,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:47,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527094492] [2021-06-05 23:37:47,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:47,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:47,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:47,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:47,043 INFO L87 Difference]: Start difference. First operand 2347 states and 10674 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:47,562 INFO L93 Difference]: Finished difference Result 2388 states and 10783 transitions. [2021-06-05 23:37:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:37:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:47,567 INFO L225 Difference]: With dead ends: 2388 [2021-06-05 23:37:47,567 INFO L226 Difference]: Without dead ends: 2381 [2021-06-05 23:37:47,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1256.5ms TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:37:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-06-05 23:37:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2349. [2021-06-05 23:37:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.5489778534923335) internal successors, (10681), 2348 states have internal predecessors, (10681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:47,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10681 transitions. [2021-06-05 23:37:47,598 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10681 transitions. Word has length 29 [2021-06-05 23:37:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:47,598 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10681 transitions. [2021-06-05 23:37:47,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10681 transitions. [2021-06-05 23:37:47,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:47,602 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:47,602 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:47,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:47,802 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:47,802 INFO L82 PathProgramCache]: Analyzing trace with hash 762815330, now seen corresponding path program 189 times [2021-06-05 23:37:47,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:47,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452207884] [2021-06-05 23:37:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:48,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:48,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452207884] [2021-06-05 23:37:48,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452207884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:48,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97918735] [2021-06-05 23:37:48,092 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:48,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:37:48,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:48,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:49,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97918735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:49,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:49,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:49,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127175294] [2021-06-05 23:37:49,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:49,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:49,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:49,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=851, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:49,063 INFO L87 Difference]: Start difference. First operand 2349 states and 10681 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:49,770 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-06-05 23:37:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:50,108 INFO L93 Difference]: Finished difference Result 2416 states and 10917 transitions. [2021-06-05 23:37:50,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:37:50,108 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:50,115 INFO L225 Difference]: With dead ends: 2416 [2021-06-05 23:37:50,115 INFO L226 Difference]: Without dead ends: 2406 [2021-06-05 23:37:50,115 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1710.5ms TimeCoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:37:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2021-06-05 23:37:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2356. [2021-06-05 23:37:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 4.548619957537155) internal successors, (10712), 2355 states have internal predecessors, (10712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:50,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 10712 transitions. [2021-06-05 23:37:50,163 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 10712 transitions. Word has length 29 [2021-06-05 23:37:50,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:50,163 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 10712 transitions. [2021-06-05 23:37:50,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:50,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 10712 transitions. [2021-06-05 23:37:50,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:50,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:50,168 INFO L554 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:50,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-06-05 23:37:50,392 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash 659784136, now seen corresponding path program 190 times [2021-06-05 23:37:50,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:50,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434085159] [2021-06-05 23:37:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:37:50,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:50,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434085159] [2021-06-05 23:37:50,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434085159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:50,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217700532] [2021-06-05 23:37:50,594 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:50,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:37:50,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:37:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:50,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:37:50,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:51,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:51,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:37:51,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:51,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:51,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:37:51,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:51,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:37:51,071 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:37:51,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:37:51,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:37:51,102 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:113, output treesize:85 [2021-06-05 23:37:53,368 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 23:37:53,648 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-06-05 23:37:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:37:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217700532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:53,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:53,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-06-05 23:37:53,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697475333] [2021-06-05 23:37:53,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:37:53,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:37:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:37:53,653 INFO L87 Difference]: Start difference. First operand 2356 states and 10712 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 23:37:54,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:54,088 INFO L93 Difference]: Finished difference Result 3321 states and 14808 transitions. [2021-06-05 23:37:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 23:37:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 29 [2021-06-05 23:37:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:54,095 INFO L225 Difference]: With dead ends: 3321 [2021-06-05 23:37:54,095 INFO L226 Difference]: Without dead ends: 3288 [2021-06-05 23:37:54,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2995.7ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:54,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-06-05 23:37:54,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2396. [2021-06-05 23:37:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2396 states, 2395 states have (on average 4.583298538622129) internal successors, (10977), 2395 states have internal predecessors, (10977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2396 states to 2396 states and 10977 transitions. [2021-06-05 23:37:54,134 INFO L78 Accepts]: Start accepts. Automaton has 2396 states and 10977 transitions. Word has length 29 [2021-06-05 23:37:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:54,134 INFO L482 AbstractCegarLoop]: Abstraction has 2396 states and 10977 transitions. [2021-06-05 23:37:54,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 23:37:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2396 states and 10977 transitions. [2021-06-05 23:37:54,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:54,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:54,137 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:54,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:54,338 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:54,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1649573022, now seen corresponding path program 191 times [2021-06-05 23:37:54,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:54,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708098291] [2021-06-05 23:37:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:54,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708098291] [2021-06-05 23:37:54,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708098291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142824855] [2021-06-05 23:37:54,754 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:54,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:37:54,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:54,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:37:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:55,175 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 23:37:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:55,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142824855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:55,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:55,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:55,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159631343] [2021-06-05 23:37:55,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:55,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:55,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:55,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:55,957 INFO L87 Difference]: Start difference. First operand 2396 states and 10977 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:56,664 INFO L93 Difference]: Finished difference Result 2468 states and 11183 transitions. [2021-06-05 23:37:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:37:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:56,668 INFO L225 Difference]: With dead ends: 2468 [2021-06-05 23:37:56,668 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 23:37:56,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1752.2ms TimeCoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:37:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 23:37:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2414. [2021-06-05 23:37:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.571073352673021) internal successors, (11030), 2413 states have internal predecessors, (11030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 11030 transitions. [2021-06-05 23:37:56,716 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 11030 transitions. Word has length 29 [2021-06-05 23:37:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:56,717 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 11030 transitions. [2021-06-05 23:37:56,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 11030 transitions. [2021-06-05 23:37:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:56,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:56,720 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:56,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 23:37:56,920 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:56,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:56,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1835368124, now seen corresponding path program 192 times [2021-06-05 23:37:56,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:56,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999471162] [2021-06-05 23:37:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:37:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:57,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:37:57,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999471162] [2021-06-05 23:37:57,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999471162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:57,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714944930] [2021-06-05 23:37:57,375 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:57,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:37:57,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:37:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:37:57,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:37:57,961 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:37:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:37:58,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714944930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:37:58,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:37:58,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:37:58,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640398989] [2021-06-05 23:37:58,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:37:58,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:37:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:37:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:37:58,327 INFO L87 Difference]: Start difference. First operand 2414 states and 11030 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:58,964 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-06-05 23:37:59,239 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-05 23:37:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:37:59,593 INFO L93 Difference]: Finished difference Result 2778 states and 12392 transitions. [2021-06-05 23:37:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:37:59,593 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:37:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:37:59,598 INFO L225 Difference]: With dead ends: 2778 [2021-06-05 23:37:59,598 INFO L226 Difference]: Without dead ends: 2763 [2021-06-05 23:37:59,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 2131.5ms TimeCoverageRelationStatistics Valid=221, Invalid=1671, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:37:59,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2021-06-05 23:37:59,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2476. [2021-06-05 23:37:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 4.586262626262626) internal successors, (11351), 2475 states have internal predecessors, (11351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:37:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 11351 transitions. [2021-06-05 23:37:59,634 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 11351 transitions. Word has length 29 [2021-06-05 23:37:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:37:59,634 INFO L482 AbstractCegarLoop]: Abstraction has 2476 states and 11351 transitions. [2021-06-05 23:37:59,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:37:59,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 11351 transitions. [2021-06-05 23:37:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 23:37:59,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:37:59,638 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:37:59,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable852,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:37:59,838 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:37:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:37:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1317777476, now seen corresponding path program 193 times [2021-06-05 23:37:59,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:37:59,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770902622] [2021-06-05 23:37:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:37:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:00,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770902622] [2021-06-05 23:38:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770902622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:00,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929051491] [2021-06-05 23:38:00,129 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:00,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:38:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:00,752 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 23:38:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:01,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929051491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:01,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:01,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-06-05 23:38:01,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120624016] [2021-06-05 23:38:01,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:38:01,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:01,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:38:01,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 23:38:01,201 INFO L87 Difference]: Start difference. First operand 2476 states and 11351 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:38:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:01,894 INFO L93 Difference]: Finished difference Result 2717 states and 12214 transitions. [2021-06-05 23:38:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:38:01,894 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 29 [2021-06-05 23:38:01,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:01,899 INFO L225 Difference]: With dead ends: 2717 [2021-06-05 23:38:01,900 INFO L226 Difference]: Without dead ends: 2698 [2021-06-05 23:38:01,900 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1539.9ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:38:01,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-05 23:38:01,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 2508. [2021-06-05 23:38:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 4.594335859593139) internal successors, (11518), 2507 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 11518 transitions. [2021-06-05 23:38:01,935 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 11518 transitions. Word has length 29 [2021-06-05 23:38:01,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:01,935 INFO L482 AbstractCegarLoop]: Abstraction has 2508 states and 11518 transitions. [2021-06-05 23:38:01,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 30 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 23:38:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 11518 transitions. [2021-06-05 23:38:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:01,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:01,939 INFO L554 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:02,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable859 [2021-06-05 23:38:02,139 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:02,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1438777063, now seen corresponding path program 194 times [2021-06-05 23:38:02,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:02,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667317552] [2021-06-05 23:38:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:02,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:02,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667317552] [2021-06-05 23:38:02,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667317552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:02,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047307057] [2021-06-05 23:38:02,413 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:02,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:38:02,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:02,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:38:02,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:03,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:03,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:03,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:03,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:03,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:03,051 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:03,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:03,054 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:03,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:03,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-06-05 23:38:03,085 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:109, output treesize:81 [2021-06-05 23:38:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:38:03,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047307057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:03,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:03,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2021-06-05 23:38:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744243626] [2021-06-05 23:38:03,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:38:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:38:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:38:03,199 INFO L87 Difference]: Start difference. First operand 2508 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 23:38:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:04,565 INFO L93 Difference]: Finished difference Result 5624 states and 23716 transitions. [2021-06-05 23:38:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:38:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 30 [2021-06-05 23:38:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:04,576 INFO L225 Difference]: With dead ends: 5624 [2021-06-05 23:38:04,576 INFO L226 Difference]: Without dead ends: 5507 [2021-06-05 23:38:04,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1637.1ms TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:38:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-05 23:38:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 2890. [2021-06-05 23:38:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2890 states, 2889 states have (on average 4.747663551401869) internal successors, (13716), 2889 states have internal predecessors, (13716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 13716 transitions. [2021-06-05 23:38:04,634 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 13716 transitions. Word has length 30 [2021-06-05 23:38:04,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:04,634 INFO L482 AbstractCegarLoop]: Abstraction has 2890 states and 13716 transitions. [2021-06-05 23:38:04,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 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 23:38:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 13716 transitions. [2021-06-05 23:38:04,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:04,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:04,638 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:04,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable866,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:04,840 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:04,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:04,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1972399915, now seen corresponding path program 195 times [2021-06-05 23:38:04,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:04,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488361475] [2021-06-05 23:38:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:05,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:05,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488361475] [2021-06-05 23:38:05,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488361475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:05,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391231263] [2021-06-05 23:38:05,322 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:05,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:38:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:06,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391231263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:06,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:06,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:06,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907951449] [2021-06-05 23:38:06,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:06,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:06,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:06,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:06,322 INFO L87 Difference]: Start difference. First operand 2890 states and 13716 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:06,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:06,952 INFO L93 Difference]: Finished difference Result 2970 states and 13926 transitions. [2021-06-05 23:38:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:38:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:06,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:06,958 INFO L225 Difference]: With dead ends: 2970 [2021-06-05 23:38:06,958 INFO L226 Difference]: Without dead ends: 2942 [2021-06-05 23:38:06,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1653.1ms TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:38:06,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-06-05 23:38:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2916. [2021-06-05 23:38:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:07,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-06-05 23:38:07,000 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-06-05 23:38:07,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:07,000 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-06-05 23:38:07,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-06-05 23:38:07,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:07,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:07,004 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:07,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 23:38:07,205 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1663574255, now seen corresponding path program 196 times [2021-06-05 23:38:07,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:07,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243437136] [2021-06-05 23:38:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:07,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:07,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243437136] [2021-06-05 23:38:07,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243437136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:07,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72915169] [2021-06-05 23:38:07,615 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:07,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:38:07,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:07,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:38:07,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:08,139 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 23:38:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:08,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72915169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:08,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:08,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:08,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012191814] [2021-06-05 23:38:08,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:08,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:08,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:08,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:08,598 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:09,332 INFO L93 Difference]: Finished difference Result 2973 states and 13938 transitions. [2021-06-05 23:38:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:38:09,333 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:09,338 INFO L225 Difference]: With dead ends: 2973 [2021-06-05 23:38:09,338 INFO L226 Difference]: Without dead ends: 2964 [2021-06-05 23:38:09,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1662.2ms TimeCoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:38:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2021-06-05 23:38:09,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2916. [2021-06-05 23:38:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2915 states have (on average 4.72967409948542) internal successors, (13787), 2915 states have internal predecessors, (13787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 13787 transitions. [2021-06-05 23:38:09,377 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 13787 transitions. Word has length 30 [2021-06-05 23:38:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:09,377 INFO L482 AbstractCegarLoop]: Abstraction has 2916 states and 13787 transitions. [2021-06-05 23:38:09,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 13787 transitions. [2021-06-05 23:38:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:09,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:09,380 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:09,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable876,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:09,581 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:09,581 INFO L82 PathProgramCache]: Analyzing trace with hash -152141107, now seen corresponding path program 197 times [2021-06-05 23:38:09,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:09,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920036442] [2021-06-05 23:38:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:09,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:09,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920036442] [2021-06-05 23:38:09,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920036442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:09,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564039329] [2021-06-05 23:38:09,874 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:09,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:38:09,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:38:09,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:10,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:10,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:10,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:10,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:10,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:10,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:10,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:10,653 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:10,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:10,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:38:10,700 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-06-05 23:38:10,842 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:10,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564039329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:10,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:10,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-06-05 23:38:10,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490318987] [2021-06-05 23:38:10,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:38:10,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:10,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:38:10,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:38:10,843 INFO L87 Difference]: Start difference. First operand 2916 states and 13787 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:11,374 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2021-06-05 23:38:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:11,755 INFO L93 Difference]: Finished difference Result 2877 states and 13430 transitions. [2021-06-05 23:38:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:38:11,755 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:11,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:11,760 INFO L225 Difference]: With dead ends: 2877 [2021-06-05 23:38:11,760 INFO L226 Difference]: Without dead ends: 2867 [2021-06-05 23:38:11,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1521.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1346, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:38:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-06-05 23:38:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2833. [2021-06-05 23:38:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2833 states, 2832 states have (on average 4.709039548022599) internal successors, (13336), 2832 states have internal predecessors, (13336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 13336 transitions. [2021-06-05 23:38:11,797 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 13336 transitions. Word has length 30 [2021-06-05 23:38:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:11,797 INFO L482 AbstractCegarLoop]: Abstraction has 2833 states and 13336 transitions. [2021-06-05 23:38:11,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 13336 transitions. [2021-06-05 23:38:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:11,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:11,801 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:12,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:12,001 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:12,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:12,002 INFO L82 PathProgramCache]: Analyzing trace with hash 529015159, now seen corresponding path program 198 times [2021-06-05 23:38:12,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:12,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555339122] [2021-06-05 23:38:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:12,285 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:12,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:12,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555339122] [2021-06-05 23:38:12,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555339122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:12,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048456118] [2021-06-05 23:38:12,286 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:12,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:38:12,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:13,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048456118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:13,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:13,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:13,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162025389] [2021-06-05 23:38:13,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:13,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:13,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:13,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:13,179 INFO L87 Difference]: Start difference. First operand 2833 states and 13336 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:14,148 INFO L93 Difference]: Finished difference Result 2924 states and 13557 transitions. [2021-06-05 23:38:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:38:14,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:14,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:14,153 INFO L225 Difference]: With dead ends: 2924 [2021-06-05 23:38:14,153 INFO L226 Difference]: Without dead ends: 2909 [2021-06-05 23:38:14,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1652.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1910, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:38:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-06-05 23:38:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2842. [2021-06-05 23:38:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 4.702569517775431) internal successors, (13360), 2841 states have internal predecessors, (13360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 13360 transitions. [2021-06-05 23:38:14,189 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 13360 transitions. Word has length 30 [2021-06-05 23:38:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:14,189 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 13360 transitions. [2021-06-05 23:38:14,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 13360 transitions. [2021-06-05 23:38:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:14,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:14,193 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:14,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:14,393 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:14,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2045937511, now seen corresponding path program 199 times [2021-06-05 23:38:14,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:14,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241131637] [2021-06-05 23:38:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:14,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:14,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241131637] [2021-06-05 23:38:14,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241131637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:14,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522491348] [2021-06-05 23:38:14,670 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:14,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:38:14,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:15,120 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 23:38:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:15,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522491348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:15,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:15,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:15,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872048111] [2021-06-05 23:38:15,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:15,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:15,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:15,536 INFO L87 Difference]: Start difference. First operand 2842 states and 13360 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:15,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:15,989 INFO L93 Difference]: Finished difference Result 2998 states and 13825 transitions. [2021-06-05 23:38:15,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:38:15,989 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:15,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:15,995 INFO L225 Difference]: With dead ends: 2998 [2021-06-05 23:38:15,995 INFO L226 Difference]: Without dead ends: 2980 [2021-06-05 23:38:15,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1155.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:38:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2021-06-05 23:38:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2865. [2021-06-05 23:38:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.696927374301676) internal successors, (13452), 2864 states have internal predecessors, (13452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13452 transitions. [2021-06-05 23:38:16,033 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13452 transitions. Word has length 30 [2021-06-05 23:38:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:16,033 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13452 transitions. [2021-06-05 23:38:16,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13452 transitions. [2021-06-05 23:38:16,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:16,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:16,037 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:16,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable890,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:16,237 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:16,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1843232981, now seen corresponding path program 200 times [2021-06-05 23:38:16,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:16,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034284456] [2021-06-05 23:38:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:16,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:16,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034284456] [2021-06-05 23:38:16,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034284456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:16,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371421086] [2021-06-05 23:38:16,716 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:16,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:38:16,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:16,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:38:16,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:17,172 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 23:38:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:17,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371421086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:17,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:17,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:17,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224257399] [2021-06-05 23:38:17,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:17,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:17,619 INFO L87 Difference]: Start difference. First operand 2865 states and 13452 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:18,432 INFO L93 Difference]: Finished difference Result 2907 states and 13565 transitions. [2021-06-05 23:38:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:38:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:18,438 INFO L225 Difference]: With dead ends: 2907 [2021-06-05 23:38:18,438 INFO L226 Difference]: Without dead ends: 2898 [2021-06-05 23:38:18,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1613.5ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:38:18,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-06-05 23:38:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2860. [2021-06-05 23:38:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2860 states, 2859 states have (on average 4.7037425673312345) internal successors, (13448), 2859 states have internal predecessors, (13448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2860 states to 2860 states and 13448 transitions. [2021-06-05 23:38:18,477 INFO L78 Accepts]: Start accepts. Automaton has 2860 states and 13448 transitions. Word has length 30 [2021-06-05 23:38:18,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:18,477 INFO L482 AbstractCegarLoop]: Abstraction has 2860 states and 13448 transitions. [2021-06-05 23:38:18,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:18,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2860 states and 13448 transitions. [2021-06-05 23:38:18,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:18,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:18,481 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:18,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable893 [2021-06-05 23:38:18,681 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:18,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:18,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2006531273, now seen corresponding path program 201 times [2021-06-05 23:38:18,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:18,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258319039] [2021-06-05 23:38:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:18,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:18,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258319039] [2021-06-05 23:38:18,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258319039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:18,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226022449] [2021-06-05 23:38:18,990 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:19,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:38:19,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:19,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:19,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:19,431 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 23:38:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:19,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226022449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:19,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:19,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:19,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864016777] [2021-06-05 23:38:19,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:19,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:19,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:19,854 INFO L87 Difference]: Start difference. First operand 2860 states and 13448 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:20,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:20,548 INFO L93 Difference]: Finished difference Result 3156 states and 14386 transitions. [2021-06-05 23:38:20,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:38:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:20,553 INFO L225 Difference]: With dead ends: 3156 [2021-06-05 23:38:20,554 INFO L226 Difference]: Without dead ends: 3137 [2021-06-05 23:38:20,554 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1206.7ms TimeCoverageRelationStatistics Valid=173, Invalid=1309, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:38:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2021-06-05 23:38:20,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 2892. [2021-06-05 23:38:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 4.698374264960221) internal successors, (13583), 2891 states have internal predecessors, (13583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 13583 transitions. [2021-06-05 23:38:20,597 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 13583 transitions. Word has length 30 [2021-06-05 23:38:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:20,597 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 13583 transitions. [2021-06-05 23:38:20,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 13583 transitions. [2021-06-05 23:38:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:20,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:20,601 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:20,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:20,802 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash 472720661, now seen corresponding path program 202 times [2021-06-05 23:38:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:20,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904474442] [2021-06-05 23:38:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:21,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:21,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904474442] [2021-06-05 23:38:21,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904474442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:21,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77545075] [2021-06-05 23:38:21,072 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:21,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:38:21,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:38:21,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:21,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:21,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:21,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:21,466 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:21,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:21,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:21,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:21,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:21,511 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:21,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:21,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:38:21,544 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:109, output treesize:81 [2021-06-05 23:38:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:38:21,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77545075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:21,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:21,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2021-06-05 23:38:21,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373744451] [2021-06-05 23:38:21,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:38:21,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:38:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:38:21,688 INFO L87 Difference]: Start difference. First operand 2892 states and 13583 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:26,483 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-06-05 23:38:30,599 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-05 23:38:30,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:30,950 INFO L93 Difference]: Finished difference Result 3764 states and 16651 transitions. [2021-06-05 23:38:30,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 23:38:30,951 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:30,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:30,958 INFO L225 Difference]: With dead ends: 3764 [2021-06-05 23:38:30,958 INFO L226 Difference]: Without dead ends: 3719 [2021-06-05 23:38:30,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 9445.3ms TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:38:30,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-05 23:38:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3063. [2021-06-05 23:38:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 4.732854343566297) internal successors, (14492), 3062 states have internal predecessors, (14492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 14492 transitions. [2021-06-05 23:38:31,007 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 14492 transitions. Word has length 30 [2021-06-05 23:38:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:31,007 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 14492 transitions. [2021-06-05 23:38:31,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 14492 transitions. [2021-06-05 23:38:31,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:31,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:31,011 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:31,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:31,211 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:31,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -968323313, now seen corresponding path program 203 times [2021-06-05 23:38:31,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:31,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280834631] [2021-06-05 23:38:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:31,532 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:31,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280834631] [2021-06-05 23:38:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280834631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491581848] [2021-06-05 23:38:31,533 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:31,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:38:31,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:31,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:38:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:32,155 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 23:38:32,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:32,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:32,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:32,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:32,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:32,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:32,378 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:32,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:32,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:32,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:32,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 23:38:32,431 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:133, output treesize:105 [2021-06-05 23:38:34,509 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 65 [2021-06-05 23:38:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:34,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491581848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:34,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:34,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-06-05 23:38:34,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816951926] [2021-06-05 23:38:34,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:38:34,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:34,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:38:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:38:34,564 INFO L87 Difference]: Start difference. First operand 3063 states and 14492 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:38,359 INFO L93 Difference]: Finished difference Result 3155 states and 14639 transitions. [2021-06-05 23:38:38,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:38:38,359 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:38,364 INFO L225 Difference]: With dead ends: 3155 [2021-06-05 23:38:38,364 INFO L226 Difference]: Without dead ends: 3139 [2021-06-05 23:38:38,365 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3339.3ms TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:38:38,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-06-05 23:38:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3053. [2021-06-05 23:38:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 4.734272608125819) internal successors, (14449), 3052 states have internal predecessors, (14449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 14449 transitions. [2021-06-05 23:38:38,406 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 14449 transitions. Word has length 30 [2021-06-05 23:38:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:38,406 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 14449 transitions. [2021-06-05 23:38:38,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:38,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 14449 transitions. [2021-06-05 23:38:38,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:38,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:38,410 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:38,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:38,611 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:38,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:38,611 INFO L82 PathProgramCache]: Analyzing trace with hash -805587235, now seen corresponding path program 204 times [2021-06-05 23:38:38,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:38,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176691622] [2021-06-05 23:38:38,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:39,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:39,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176691622] [2021-06-05 23:38:39,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176691622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:39,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321644714] [2021-06-05 23:38:39,040 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:39,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:38:39,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:39,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:39,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321644714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:39,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:39,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:39,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413608150] [2021-06-05 23:38:39,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:39,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:39,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:39,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:39,836 INFO L87 Difference]: Start difference. First operand 3053 states and 14449 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:41,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:41,438 INFO L93 Difference]: Finished difference Result 3587 states and 16130 transitions. [2021-06-05 23:38:41,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:38:41,438 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:41,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:41,445 INFO L225 Difference]: With dead ends: 3587 [2021-06-05 23:38:41,445 INFO L226 Difference]: Without dead ends: 3548 [2021-06-05 23:38:41,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2130.5ms TimeCoverageRelationStatistics Valid=257, Invalid=2605, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 23:38:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3548 states. [2021-06-05 23:38:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3548 to 3155. [2021-06-05 23:38:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 4.734939759036145) internal successors, (14934), 3154 states have internal predecessors, (14934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 14934 transitions. [2021-06-05 23:38:41,494 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 14934 transitions. Word has length 30 [2021-06-05 23:38:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:41,494 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 14934 transitions. [2021-06-05 23:38:41,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 14934 transitions. [2021-06-05 23:38:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:41,498 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:41,498 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:41,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable910 [2021-06-05 23:38:41,698 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:41,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:41,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1211384039, now seen corresponding path program 205 times [2021-06-05 23:38:41,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:41,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119930271] [2021-06-05 23:38:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:42,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:42,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119930271] [2021-06-05 23:38:42,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119930271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:42,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188050521] [2021-06-05 23:38:42,179 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:42,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:38:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:43,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188050521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:43,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:43,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:43,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145555699] [2021-06-05 23:38:43,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:43,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:43,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:43,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:43,061 INFO L87 Difference]: Start difference. First operand 3155 states and 14934 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:44,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:44,009 INFO L93 Difference]: Finished difference Result 3231 states and 15150 transitions. [2021-06-05 23:38:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:38:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:44,015 INFO L225 Difference]: With dead ends: 3231 [2021-06-05 23:38:44,015 INFO L226 Difference]: Without dead ends: 3213 [2021-06-05 23:38:44,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1771.3ms TimeCoverageRelationStatistics Valid=159, Invalid=1821, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:38:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2021-06-05 23:38:44,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 3160. [2021-06-05 23:38:44,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3160 states, 3159 states have (on average 4.733459955682178) internal successors, (14953), 3159 states have internal predecessors, (14953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 14953 transitions. [2021-06-05 23:38:44,058 INFO L78 Accepts]: Start accepts. Automaton has 3160 states and 14953 transitions. Word has length 30 [2021-06-05 23:38:44,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:44,058 INFO L482 AbstractCegarLoop]: Abstraction has 3160 states and 14953 transitions. [2021-06-05 23:38:44,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3160 states and 14953 transitions. [2021-06-05 23:38:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:44,062 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:44,062 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:44,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-05 23:38:44,262 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 308768783, now seen corresponding path program 206 times [2021-06-05 23:38:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:44,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101938278] [2021-06-05 23:38:44,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:38:44,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:44,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101938278] [2021-06-05 23:38:44,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101938278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:44,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500471704] [2021-06-05 23:38:44,420 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:44,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:38:44,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:38:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:45,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:45,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:45,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:45,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:45,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:45,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:45,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:45,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:45,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:45,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:45,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 23:38:45,188 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-05 23:38:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:38:45,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500471704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:45,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:45,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-06-05 23:38:45,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372951127] [2021-06-05 23:38:45,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 23:38:45,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 23:38:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 23:38:45,321 INFO L87 Difference]: Start difference. First operand 3160 states and 14953 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:46,033 INFO L93 Difference]: Finished difference Result 3222 states and 15004 transitions. [2021-06-05 23:38:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:38:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:38:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:46,041 INFO L225 Difference]: With dead ends: 3222 [2021-06-05 23:38:46,041 INFO L226 Difference]: Without dead ends: 3214 [2021-06-05 23:38:46,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 905.0ms TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:38:46,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3214 states. [2021-06-05 23:38:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3214 to 3123. [2021-06-05 23:38:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 4.721652786675208) internal successors, (14741), 3122 states have internal predecessors, (14741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 14741 transitions. [2021-06-05 23:38:46,092 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 14741 transitions. Word has length 30 [2021-06-05 23:38:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:46,092 INFO L482 AbstractCegarLoop]: Abstraction has 3123 states and 14741 transitions. [2021-06-05 23:38:46,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 14741 transitions. [2021-06-05 23:38:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:46,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:46,096 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:46,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:46,297 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:46,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash 65708057, now seen corresponding path program 207 times [2021-06-05 23:38:46,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:46,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320736298] [2021-06-05 23:38:46,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:46,681 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:46,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:46,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320736298] [2021-06-05 23:38:46,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320736298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:46,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431912064] [2021-06-05 23:38:46,681 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:46,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 23:38:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:38:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:47,190 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-06-05 23:38:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:47,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431912064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:47,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:47,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:47,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934998491] [2021-06-05 23:38:47,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:47,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:47,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:47,586 INFO L87 Difference]: Start difference. First operand 3123 states and 14741 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:48,125 INFO L93 Difference]: Finished difference Result 3173 states and 14878 transitions. [2021-06-05 23:38:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:38:48,125 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:48,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:48,130 INFO L225 Difference]: With dead ends: 3173 [2021-06-05 23:38:48,130 INFO L226 Difference]: Without dead ends: 3164 [2021-06-05 23:38:48,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1303.1ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 23:38:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-06-05 23:38:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 3120. [2021-06-05 23:38:48,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3120 states, 3119 states have (on average 4.727476755370311) internal successors, (14745), 3119 states have internal predecessors, (14745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3120 states to 3120 states and 14745 transitions. [2021-06-05 23:38:48,171 INFO L78 Accepts]: Start accepts. Automaton has 3120 states and 14745 transitions. Word has length 30 [2021-06-05 23:38:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:48,171 INFO L482 AbstractCegarLoop]: Abstraction has 3120 states and 14745 transitions. [2021-06-05 23:38:48,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3120 states and 14745 transitions. [2021-06-05 23:38:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:48,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:48,175 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:48,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 23:38:48,377 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash -340088747, now seen corresponding path program 208 times [2021-06-05 23:38:48,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:48,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311085269] [2021-06-05 23:38:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:48,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:48,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311085269] [2021-06-05 23:38:48,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311085269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:48,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619871425] [2021-06-05 23:38:48,681 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:48,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:38:48,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:48,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:38:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:49,246 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-06-05 23:38:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:49,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619871425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:49,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:49,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:38:49,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98716823] [2021-06-05 23:38:49,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:38:49,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:49,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:38:49,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:38:49,762 INFO L87 Difference]: Start difference. First operand 3120 states and 14745 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:38:50,565 INFO L93 Difference]: Finished difference Result 3224 states and 15081 transitions. [2021-06-05 23:38:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:38:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:38:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:38:50,571 INFO L225 Difference]: With dead ends: 3224 [2021-06-05 23:38:50,571 INFO L226 Difference]: Without dead ends: 3215 [2021-06-05 23:38:50,572 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1611.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:38:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-06-05 23:38:50,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 3107. [2021-06-05 23:38:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3107 states, 3106 states have (on average 4.74275595621378) internal successors, (14731), 3106 states have internal predecessors, (14731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:38:50,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3107 states to 3107 states and 14731 transitions. [2021-06-05 23:38:50,620 INFO L78 Accepts]: Start accepts. Automaton has 3107 states and 14731 transitions. Word has length 30 [2021-06-05 23:38:50,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:38:50,620 INFO L482 AbstractCegarLoop]: Abstraction has 3107 states and 14731 transitions. [2021-06-05 23:38:50,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:38:50,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3107 states and 14731 transitions. [2021-06-05 23:38:50,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:38:50,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:38:50,624 INFO L554 BasicCegarLoop]: trace histogram [7, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:38:50,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable925,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:50,825 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:38:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:38:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1642624171, now seen corresponding path program 209 times [2021-06-05 23:38:50,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:38:50,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320161699] [2021-06-05 23:38:50,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:38:50,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:38:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:38:51,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:38:51,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320161699] [2021-06-05 23:38:51,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320161699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:51,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113794292] [2021-06-05 23:38:51,143 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:38:51,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:38:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:38:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:38:51,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:38:51,627 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-06-05 23:38:51,985 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-05 23:38:52,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:52,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:52,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:52,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:52,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:52,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:52,353 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:52,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:38:52,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:38:52,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:38:52,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:38:52,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:157, output treesize:129 [2021-06-05 23:38:58,516 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 23:38:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:38:58,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113794292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:38:58,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:38:58,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-06-05 23:38:58,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093321636] [2021-06-05 23:38:58,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 23:38:58,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:38:58,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 23:38:58,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=591, Unknown=1, NotChecked=0, Total=702 [2021-06-05 23:38:58,594 INFO L87 Difference]: Start difference. First operand 3107 states and 14731 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:09,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:09,242 INFO L93 Difference]: Finished difference Result 3919 states and 17589 transitions. [2021-06-05 23:39:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:39:09,242 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:09,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:09,250 INFO L225 Difference]: With dead ends: 3919 [2021-06-05 23:39:09,250 INFO L226 Difference]: Without dead ends: 3898 [2021-06-05 23:39:09,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 7502.5ms TimeCoverageRelationStatistics Valid=197, Invalid=992, Unknown=1, NotChecked=0, Total=1190 [2021-06-05 23:39:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-06-05 23:39:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 2894. [2021-06-05 23:39:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2894 states, 2893 states have (on average 4.713100587625302) internal successors, (13635), 2893 states have internal predecessors, (13635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 13635 transitions. [2021-06-05 23:39:09,304 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 13635 transitions. Word has length 30 [2021-06-05 23:39:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:09,304 INFO L482 AbstractCegarLoop]: Abstraction has 2894 states and 13635 transitions. [2021-06-05 23:39:09,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 13635 transitions. [2021-06-05 23:39:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:09,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:09,308 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:09,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable931 [2021-06-05 23:39:09,508 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2118720273, now seen corresponding path program 210 times [2021-06-05 23:39:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:09,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908855025] [2021-06-05 23:39:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:09,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:09,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:09,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908855025] [2021-06-05 23:39:09,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908855025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:09,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420244955] [2021-06-05 23:39:09,899 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:09,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 23:39:09,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:39:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:10,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420244955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:10,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:10,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:39:10,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223536119] [2021-06-05 23:39:10,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:39:10,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:10,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:39:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:39:10,923 INFO L87 Difference]: Start difference. First operand 2894 states and 13635 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:11,337 INFO L93 Difference]: Finished difference Result 2935 states and 13749 transitions. [2021-06-05 23:39:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:39:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:39:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:11,342 INFO L225 Difference]: With dead ends: 2935 [2021-06-05 23:39:11,343 INFO L226 Difference]: Without dead ends: 2927 [2021-06-05 23:39:11,343 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1324.4ms TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 23:39:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-06-05 23:39:11,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 2884. [2021-06-05 23:39:11,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2884 states, 2883 states have (on average 4.722858133888311) internal successors, (13616), 2883 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2884 states to 2884 states and 13616 transitions. [2021-06-05 23:39:11,381 INFO L78 Accepts]: Start accepts. Automaton has 2884 states and 13616 transitions. Word has length 30 [2021-06-05 23:39:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:11,381 INFO L482 AbstractCegarLoop]: Abstraction has 2884 states and 13616 transitions. [2021-06-05 23:39:11,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 2884 states and 13616 transitions. [2021-06-05 23:39:11,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:11,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:11,385 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:11,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 23:39:11,585 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:11,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:11,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1459727147, now seen corresponding path program 211 times [2021-06-05 23:39:11,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:11,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734797889] [2021-06-05 23:39:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:12,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:12,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734797889] [2021-06-05 23:39:12,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734797889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:12,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080214038] [2021-06-05 23:39:12,104 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:12,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 23:39:12,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:12,688 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:39:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:13,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080214038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:13,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:13,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:39:13,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129014084] [2021-06-05 23:39:13,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:39:13,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:13,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:39:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:39:13,107 INFO L87 Difference]: Start difference. First operand 2884 states and 13616 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:14,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:14,153 INFO L93 Difference]: Finished difference Result 2956 states and 13808 transitions. [2021-06-05 23:39:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:39:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:39:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:14,158 INFO L225 Difference]: With dead ends: 2956 [2021-06-05 23:39:14,158 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 23:39:14,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1916.7ms TimeCoverageRelationStatistics Valid=164, Invalid=1728, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 23:39:14,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 23:39:14,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2868. [2021-06-05 23:39:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2867 states have (on average 4.732472968259505) internal successors, (13568), 2867 states have internal predecessors, (13568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 13568 transitions. [2021-06-05 23:39:14,197 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 13568 transitions. Word has length 30 [2021-06-05 23:39:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:14,198 INFO L482 AbstractCegarLoop]: Abstraction has 2868 states and 13568 transitions. [2021-06-05 23:39:14,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:14,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 13568 transitions. [2021-06-05 23:39:14,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:14,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:14,201 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:14,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:14,402 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash -355988215, now seen corresponding path program 212 times [2021-06-05 23:39:14,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:14,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114243042] [2021-06-05 23:39:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:39:14,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:14,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114243042] [2021-06-05 23:39:14,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114243042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:14,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720023814] [2021-06-05 23:39:14,660 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:14,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:14,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:39:14,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:15,273 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 23:39:15,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:15,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:15,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:15,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:15,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:15,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:15,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:15,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:15,481 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:15,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:15,532 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 23:39:15,532 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-05 23:39:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:39:15,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720023814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:15,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:15,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-06-05 23:39:15,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102443836] [2021-06-05 23:39:15,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:39:15,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:15,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:39:15,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:39:15,703 INFO L87 Difference]: Start difference. First operand 2868 states and 13568 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:16,446 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 23:39:16,614 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-06-05 23:39:16,817 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-05 23:39:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:17,008 INFO L93 Difference]: Finished difference Result 3055 states and 13736 transitions. [2021-06-05 23:39:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:39:17,008 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:17,013 INFO L225 Difference]: With dead ends: 3055 [2021-06-05 23:39:17,013 INFO L226 Difference]: Without dead ends: 3013 [2021-06-05 23:39:17,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1806.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:39:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3013 states. [2021-06-05 23:39:17,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3013 to 2785. [2021-06-05 23:39:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 4.704741379310345) internal successors, (13098), 2784 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 13098 transitions. [2021-06-05 23:39:17,051 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 13098 transitions. Word has length 30 [2021-06-05 23:39:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:17,052 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 13098 transitions. [2021-06-05 23:39:17,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 13098 transitions. [2021-06-05 23:39:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:17,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:17,056 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:17,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable951 [2021-06-05 23:39:17,261 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:17,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:17,261 INFO L82 PathProgramCache]: Analyzing trace with hash 325168051, now seen corresponding path program 213 times [2021-06-05 23:39:17,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:17,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163542445] [2021-06-05 23:39:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:17,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163542445] [2021-06-05 23:39:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163542445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645467694] [2021-06-05 23:39:17,641 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:17,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:39:17,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:18,073 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-06-05 23:39:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:18,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645467694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:18,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:18,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:39:18,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680771634] [2021-06-05 23:39:18,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:39:18,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:18,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:39:18,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:39:18,519 INFO L87 Difference]: Start difference. First operand 2785 states and 13098 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:19,173 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-06-05 23:39:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:20,266 INFO L93 Difference]: Finished difference Result 3385 states and 15139 transitions. [2021-06-05 23:39:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:39:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:39:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:20,274 INFO L225 Difference]: With dead ends: 3385 [2021-06-05 23:39:20,275 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 23:39:20,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 2315.8ms TimeCoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 23:39:20,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 23:39:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2865. [2021-06-05 23:39:20,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2864 states have (on average 4.692039106145251) internal successors, (13438), 2864 states have internal predecessors, (13438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 13438 transitions. [2021-06-05 23:39:20,323 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 13438 transitions. Word has length 30 [2021-06-05 23:39:20,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:20,324 INFO L482 AbstractCegarLoop]: Abstraction has 2865 states and 13438 transitions. [2021-06-05 23:39:20,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 13438 transitions. [2021-06-05 23:39:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:20,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:20,328 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:20,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable958 [2021-06-05 23:39:20,531 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:20,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:20,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1822744915, now seen corresponding path program 214 times [2021-06-05 23:39:20,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:20,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135870763] [2021-06-05 23:39:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:20,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135870763] [2021-06-05 23:39:20,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135870763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:20,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731605755] [2021-06-05 23:39:20,844 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:20,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:39:20,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:39:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:21,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:21,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:21,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:21,385 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:21,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:21,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:21,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:21,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:21,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:21,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:21,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:39:21,470 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:119, output treesize:91 [2021-06-05 23:39:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:39:21,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731605755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:21,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:21,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2021-06-05 23:39:21,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014090910] [2021-06-05 23:39:21,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:39:21,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:21,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:39:21,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:39:21,585 INFO L87 Difference]: Start difference. First operand 2865 states and 13438 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 23:39:26,683 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-06-05 23:39:26,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:26,951 INFO L93 Difference]: Finished difference Result 3569 states and 15801 transitions. [2021-06-05 23:39:26,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 23:39:26,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 30 [2021-06-05 23:39:26,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:26,958 INFO L225 Difference]: With dead ends: 3569 [2021-06-05 23:39:26,958 INFO L226 Difference]: Without dead ends: 3527 [2021-06-05 23:39:26,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 5563.4ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:39:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-06-05 23:39:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2982. [2021-06-05 23:39:27,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.682321368668232) internal successors, (13958), 2981 states have internal predecessors, (13958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 13958 transitions. [2021-06-05 23:39:27,007 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 13958 transitions. Word has length 30 [2021-06-05 23:39:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:27,007 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 13958 transitions. [2021-06-05 23:39:27,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 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 23:39:27,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 13958 transitions. [2021-06-05 23:39:27,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:27,011 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:27,011 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:27,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable961,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:27,212 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:27,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:27,212 INFO L82 PathProgramCache]: Analyzing trace with hash 844238639, now seen corresponding path program 215 times [2021-06-05 23:39:27,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:27,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230382520] [2021-06-05 23:39:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:27,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:27,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230382520] [2021-06-05 23:39:27,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230382520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:27,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351818270] [2021-06-05 23:39:27,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:27,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:39:27,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:39:27,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351818270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:28,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:28,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:39:28,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783569363] [2021-06-05 23:39:28,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:39:28,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:28,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:39:28,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:39:28,300 INFO L87 Difference]: Start difference. First operand 2982 states and 13958 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:28,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:28,726 INFO L93 Difference]: Finished difference Result 3047 states and 14149 transitions. [2021-06-05 23:39:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:39:28,727 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:39:28,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:28,732 INFO L225 Difference]: With dead ends: 3047 [2021-06-05 23:39:28,732 INFO L226 Difference]: Without dead ends: 3042 [2021-06-05 23:39:28,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1080.0ms TimeCoverageRelationStatistics Valid=120, Invalid=1286, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 23:39:28,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3042 states. [2021-06-05 23:39:28,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3042 to 2976. [2021-06-05 23:39:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2976 states, 2975 states have (on average 4.68436974789916) internal successors, (13936), 2975 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 13936 transitions. [2021-06-05 23:39:28,772 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 13936 transitions. Word has length 30 [2021-06-05 23:39:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:28,772 INFO L482 AbstractCegarLoop]: Abstraction has 2976 states and 13936 transitions. [2021-06-05 23:39:28,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 13936 transitions. [2021-06-05 23:39:28,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:28,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:28,776 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:28,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 23:39:28,977 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:28,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1600927089, now seen corresponding path program 216 times [2021-06-05 23:39:28,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:28,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823858859] [2021-06-05 23:39:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:29,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:29,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823858859] [2021-06-05 23:39:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823858859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:29,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002050990] [2021-06-05 23:39:29,250 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:29,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:39:29,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:39:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:29,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:29,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:29,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:29,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:29,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:29,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:29,954 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:29,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:29,958 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:30,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:30,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:39:30,007 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:147, output treesize:119 [2021-06-05 23:39:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:39:30,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002050990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:30,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:30,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:39:30,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52643663] [2021-06-05 23:39:30,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:39:30,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:30,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:39:30,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:39:30,140 INFO L87 Difference]: Start difference. First operand 2976 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 23:39:31,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:31,108 INFO L93 Difference]: Finished difference Result 3127 states and 14283 transitions. [2021-06-05 23:39:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:39:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 30 [2021-06-05 23:39:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:31,114 INFO L225 Difference]: With dead ends: 3127 [2021-06-05 23:39:31,114 INFO L226 Difference]: Without dead ends: 3111 [2021-06-05 23:39:31,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1448.8ms TimeCoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:39:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-05 23:39:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2977. [2021-06-05 23:39:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2977 states, 2976 states have (on average 4.6875) internal successors, (13950), 2976 states have internal predecessors, (13950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2977 states to 2977 states and 13950 transitions. [2021-06-05 23:39:31,156 INFO L78 Accepts]: Start accepts. Automaton has 2977 states and 13950 transitions. Word has length 30 [2021-06-05 23:39:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:31,156 INFO L482 AbstractCegarLoop]: Abstraction has 2977 states and 13950 transitions. [2021-06-05 23:39:31,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 23:39:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2977 states and 13950 transitions. [2021-06-05 23:39:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:31,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:31,160 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:31,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:31,360 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:31,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1654264789, now seen corresponding path program 217 times [2021-06-05 23:39:31,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:31,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720310727] [2021-06-05 23:39:31,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:31,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:31,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720310727] [2021-06-05 23:39:31,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720310727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:31,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738749882] [2021-06-05 23:39:31,741 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:31,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:39:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:32,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738749882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:32,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:32,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:39:32,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202354599] [2021-06-05 23:39:32,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:39:32,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:39:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:39:32,591 INFO L87 Difference]: Start difference. First operand 2977 states and 13950 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:34,183 INFO L93 Difference]: Finished difference Result 3332 states and 15161 transitions. [2021-06-05 23:39:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:39:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:39:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:34,190 INFO L225 Difference]: With dead ends: 3332 [2021-06-05 23:39:34,190 INFO L226 Difference]: Without dead ends: 3309 [2021-06-05 23:39:34,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2150.4ms TimeCoverageRelationStatistics Valid=308, Invalid=2448, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:39:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2021-06-05 23:39:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3028. [2021-06-05 23:39:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3028 states, 3027 states have (on average 4.686157912124215) internal successors, (14185), 3027 states have internal predecessors, (14185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3028 states to 3028 states and 14185 transitions. [2021-06-05 23:39:34,235 INFO L78 Accepts]: Start accepts. Automaton has 3028 states and 14185 transitions. Word has length 30 [2021-06-05 23:39:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:34,235 INFO L482 AbstractCegarLoop]: Abstraction has 3028 states and 14185 transitions. [2021-06-05 23:39:34,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3028 states and 14185 transitions. [2021-06-05 23:39:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:34,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:34,239 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:34,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-05 23:39:34,441 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:34,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:34,442 INFO L82 PathProgramCache]: Analyzing trace with hash -161450573, now seen corresponding path program 218 times [2021-06-05 23:39:34,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:34,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399505224] [2021-06-05 23:39:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:39:34,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:34,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399505224] [2021-06-05 23:39:34,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399505224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:34,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091894645] [2021-06-05 23:39:34,657 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:34,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:39:34,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 23:39:34,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:35,299 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2021-06-05 23:39:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:35,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:35,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:35,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:35,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:35,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:35,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:35,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:35,530 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:35,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:35,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 23:39:35,579 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 7 variables, input treesize:143, output treesize:115 [2021-06-05 23:39:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:39:35,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091894645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:35,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:35,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 23:39:35,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674110762] [2021-06-05 23:39:35,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:39:35,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:39:35,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:39:35,741 INFO L87 Difference]: Start difference. First operand 3028 states and 14185 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:38,645 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-05 23:39:38,880 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-06-05 23:39:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:40,755 INFO L93 Difference]: Finished difference Result 3185 states and 14482 transitions. [2021-06-05 23:39:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:39:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 23:39:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:40,761 INFO L225 Difference]: With dead ends: 3185 [2021-06-05 23:39:40,761 INFO L226 Difference]: Without dead ends: 3175 [2021-06-05 23:39:40,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1958.0ms TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 23:39:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3175 states. [2021-06-05 23:39:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3175 to 3020. [2021-06-05 23:39:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3020 states, 3019 states have (on average 4.68532626697582) internal successors, (14145), 3019 states have internal predecessors, (14145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3020 states to 3020 states and 14145 transitions. [2021-06-05 23:39:40,803 INFO L78 Accepts]: Start accepts. Automaton has 3020 states and 14145 transitions. Word has length 30 [2021-06-05 23:39:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:40,803 INFO L482 AbstractCegarLoop]: Abstraction has 3020 states and 14145 transitions. [2021-06-05 23:39:40,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3020 states and 14145 transitions. [2021-06-05 23:39:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 23:39:40,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:40,807 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:41,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 23:39:41,009 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:41,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2045182677, now seen corresponding path program 219 times [2021-06-05 23:39:41,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:41,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145804259] [2021-06-05 23:39:41,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:41,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:41,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145804259] [2021-06-05 23:39:41,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145804259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:41,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363952669] [2021-06-05 23:39:41,414 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:41,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:39:41,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:41,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:39:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:42,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363952669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:42,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:42,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-06-05 23:39:42,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126440559] [2021-06-05 23:39:42,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 23:39:42,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 23:39:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:39:42,260 INFO L87 Difference]: Start difference. First operand 3020 states and 14145 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:43,138 INFO L93 Difference]: Finished difference Result 3462 states and 15765 transitions. [2021-06-05 23:39:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:39:43,139 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-06-05 23:39:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:43,145 INFO L225 Difference]: With dead ends: 3462 [2021-06-05 23:39:43,145 INFO L226 Difference]: Without dead ends: 3426 [2021-06-05 23:39:43,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1492.7ms TimeCoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:39:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2021-06-05 23:39:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 3090. [2021-06-05 23:39:43,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3090 states, 3089 states have (on average 4.68824862415021) internal successors, (14482), 3089 states have internal predecessors, (14482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3090 states to 3090 states and 14482 transitions. [2021-06-05 23:39:43,191 INFO L78 Accepts]: Start accepts. Automaton has 3090 states and 14482 transitions. Word has length 30 [2021-06-05 23:39:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:43,191 INFO L482 AbstractCegarLoop]: Abstraction has 3090 states and 14482 transitions. [2021-06-05 23:39:43,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 23:39:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3090 states and 14482 transitions. [2021-06-05 23:39:43,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:39:43,195 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:43,195 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:43,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 23:39:43,396 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:43,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1574669730, now seen corresponding path program 220 times [2021-06-05 23:39:43,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:43,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580509525] [2021-06-05 23:39:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:43,829 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 23:39:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:44,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:44,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580509525] [2021-06-05 23:39:44,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580509525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:44,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665856854] [2021-06-05 23:39:44,088 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:44,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:39:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:44,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:39:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:44,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:44,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:44,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:44,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:44,754 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:44,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:44,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:44,792 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:44,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:44,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:39:44,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:39:44,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:39:44,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:39:44,864 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-06-05 23:39:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:39:44,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665856854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:44,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:44,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-06-05 23:39:44,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742529034] [2021-06-05 23:39:44,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:39:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:39:44,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:39:44,991 INFO L87 Difference]: Start difference. First operand 3090 states and 14482 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:46,351 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-05 23:39:50,489 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 23:39:54,630 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-05 23:39:54,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:54,978 INFO L93 Difference]: Finished difference Result 4299 states and 19280 transitions. [2021-06-05 23:39:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 23:39:54,978 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:39:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:54,988 INFO L225 Difference]: With dead ends: 4299 [2021-06-05 23:39:54,988 INFO L226 Difference]: Without dead ends: 4284 [2021-06-05 23:39:54,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 10429.4ms TimeCoverageRelationStatistics Valid=199, Invalid=2251, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 23:39:54,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2021-06-05 23:39:55,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3385. [2021-06-05 23:39:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3385 states, 3384 states have (on average 4.755910165484633) internal successors, (16094), 3384 states have internal predecessors, (16094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3385 states to 3385 states and 16094 transitions. [2021-06-05 23:39:55,058 INFO L78 Accepts]: Start accepts. Automaton has 3385 states and 16094 transitions. Word has length 31 [2021-06-05 23:39:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:55,058 INFO L482 AbstractCegarLoop]: Abstraction has 3385 states and 16094 transitions. [2021-06-05 23:39:55,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3385 states and 16094 transitions. [2021-06-05 23:39:55,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:39:55,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:55,063 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:55,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable984,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:55,264 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -501858524, now seen corresponding path program 221 times [2021-06-05 23:39:55,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:55,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083891480] [2021-06-05 23:39:55,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:55,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083891480] [2021-06-05 23:39:55,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083891480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727915664] [2021-06-05 23:39:55,655 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:55,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 23:39:55,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:55,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:39:55,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:56,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727915664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:56,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:56,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:39:56,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139571135] [2021-06-05 23:39:56,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:39:56,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:39:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:39:56,615 INFO L87 Difference]: Start difference. First operand 3385 states and 16094 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:39:57,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:39:57,832 INFO L93 Difference]: Finished difference Result 3784 states and 17341 transitions. [2021-06-05 23:39:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 23:39:57,833 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:39:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:39:57,840 INFO L225 Difference]: With dead ends: 3784 [2021-06-05 23:39:57,840 INFO L226 Difference]: Without dead ends: 3754 [2021-06-05 23:39:57,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1888.9ms TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:39:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-06-05 23:39:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3427. [2021-06-05 23:39:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 4.752189141856392) internal successors, (16281), 3426 states have internal predecessors, (16281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:39:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 16281 transitions. [2021-06-05 23:39:57,893 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 16281 transitions. Word has length 31 [2021-06-05 23:39:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:39:57,894 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 16281 transitions. [2021-06-05 23:39:57,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:39:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 16281 transitions. [2021-06-05 23:39:57,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:39:57,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:39:57,898 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:39:58,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable991 [2021-06-05 23:39:58,099 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:39:58,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:39:58,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1313452132, now seen corresponding path program 222 times [2021-06-05 23:39:58,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:39:58,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534161877] [2021-06-05 23:39:58,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:39:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:39:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:58,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:39:58,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534161877] [2021-06-05 23:39:58,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534161877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:58,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443274905] [2021-06-05 23:39:58,464 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:39:58,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:39:58,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:39:58,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:39:58,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:39:58,866 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 23:39:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:39:59,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443274905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:39:59,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:39:59,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:39:59,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122482950] [2021-06-05 23:39:59,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:39:59,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:39:59,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:39:59,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1070, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:39:59,406 INFO L87 Difference]: Start difference. First operand 3427 states and 16281 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:00,528 INFO L93 Difference]: Finished difference Result 3523 states and 16535 transitions. [2021-06-05 23:40:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:40:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:00,534 INFO L225 Difference]: With dead ends: 3523 [2021-06-05 23:40:00,535 INFO L226 Difference]: Without dead ends: 3514 [2021-06-05 23:40:00,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1800.5ms TimeCoverageRelationStatistics Valid=250, Invalid=2102, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 23:40:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-06-05 23:40:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 3416. [2021-06-05 23:40:00,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 4.759590043923866) internal successors, (16254), 3415 states have internal predecessors, (16254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:00,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 16254 transitions. [2021-06-05 23:40:00,583 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 16254 transitions. Word has length 31 [2021-06-05 23:40:00,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:00,583 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 16254 transitions. [2021-06-05 23:40:00,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:00,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 16254 transitions. [2021-06-05 23:40:00,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:00,588 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:00,588 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:00,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable994,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:00,788 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:00,789 INFO L82 PathProgramCache]: Analyzing trace with hash -977706982, now seen corresponding path program 223 times [2021-06-05 23:40:00,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:00,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262126410] [2021-06-05 23:40:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:01,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:01,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262126410] [2021-06-05 23:40:01,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262126410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:01,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856633976] [2021-06-05 23:40:01,127 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:01,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:40:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:01,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:01,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:01,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:01,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:01,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:01,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:01,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:01,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:01,955 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:02,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:02,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:40:02,036 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:157, output treesize:129 [2021-06-05 23:40:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:02,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856633976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:02,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:02,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2021-06-05 23:40:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581468863] [2021-06-05 23:40:02,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 23:40:02,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:02,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 23:40:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 23:40:02,248 INFO L87 Difference]: Start difference. First operand 3416 states and 16254 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 23:40:03,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:03,513 INFO L93 Difference]: Finished difference Result 4312 states and 19940 transitions. [2021-06-05 23:40:03,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 23:40:03,514 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 31 [2021-06-05 23:40:03,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:03,522 INFO L225 Difference]: With dead ends: 4312 [2021-06-05 23:40:03,522 INFO L226 Difference]: Without dead ends: 4297 [2021-06-05 23:40:03,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1699.3ms TimeCoverageRelationStatistics Valid=323, Invalid=1839, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 23:40:03,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-06-05 23:40:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3442. [2021-06-05 23:40:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3442 states, 3441 states have (on average 4.745422842197036) internal successors, (16329), 3441 states have internal predecessors, (16329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3442 states to 3442 states and 16329 transitions. [2021-06-05 23:40:03,581 INFO L78 Accepts]: Start accepts. Automaton has 3442 states and 16329 transitions. Word has length 31 [2021-06-05 23:40:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:03,581 INFO L482 AbstractCegarLoop]: Abstraction has 3442 states and 16329 transitions. [2021-06-05 23:40:03,582 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 23:40:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3442 states and 16329 transitions. [2021-06-05 23:40:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:03,586 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:03,586 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:03,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-06-05 23:40:03,787 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1892834208, now seen corresponding path program 224 times [2021-06-05 23:40:03,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:03,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249598478] [2021-06-05 23:40:03,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:04,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:04,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249598478] [2021-06-05 23:40:04,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249598478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:04,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100869372] [2021-06-05 23:40:04,219 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:04,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:04,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:04,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:05,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100869372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:05,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:05,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:05,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915802491] [2021-06-05 23:40:05,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:05,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:05,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:05,041 INFO L87 Difference]: Start difference. First operand 3442 states and 16329 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:05,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:05,543 INFO L93 Difference]: Finished difference Result 3497 states and 16477 transitions. [2021-06-05 23:40:05,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:40:05,543 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:05,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:05,549 INFO L225 Difference]: With dead ends: 3497 [2021-06-05 23:40:05,549 INFO L226 Difference]: Without dead ends: 3488 [2021-06-05 23:40:05,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1262.1ms TimeCoverageRelationStatistics Valid=155, Invalid=1485, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 23:40:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3488 states. [2021-06-05 23:40:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3488 to 3445. [2021-06-05 23:40:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3444 states have (on average 4.745354239256678) internal successors, (16343), 3444 states have internal predecessors, (16343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 16343 transitions. [2021-06-05 23:40:05,598 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 16343 transitions. Word has length 31 [2021-06-05 23:40:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:05,598 INFO L482 AbstractCegarLoop]: Abstraction has 3445 states and 16343 transitions. [2021-06-05 23:40:05,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 16343 transitions. [2021-06-05 23:40:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:05,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:05,603 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:05,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1014 [2021-06-05 23:40:05,803 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:05,804 INFO L82 PathProgramCache]: Analyzing trace with hash 262643294, now seen corresponding path program 225 times [2021-06-05 23:40:05,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:05,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804761198] [2021-06-05 23:40:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:06,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:06,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804761198] [2021-06-05 23:40:06,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804761198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:06,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909226857] [2021-06-05 23:40:06,188 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:06,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 23:40:06,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:06,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:40:06,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:06,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:06,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:06,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:06,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:06,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:06,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:06,955 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:06,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:07,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:07,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:07,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:07,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:40:07,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:127, output treesize:99 [2021-06-05 23:40:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:07,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909226857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:07,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:07,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2021-06-05 23:40:07,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518429313] [2021-06-05 23:40:07,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 23:40:07,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:07,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 23:40:07,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:40:07,170 INFO L87 Difference]: Start difference. First operand 3445 states and 16343 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 23:40:08,734 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-06-05 23:40:12,877 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-06-05 23:40:17,030 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-06-05 23:40:17,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:17,345 INFO L93 Difference]: Finished difference Result 6226 states and 27707 transitions. [2021-06-05 23:40:17,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 23:40:17,345 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 31 [2021-06-05 23:40:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:17,359 INFO L225 Difference]: With dead ends: 6226 [2021-06-05 23:40:17,359 INFO L226 Difference]: Without dead ends: 6145 [2021-06-05 23:40:17,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 10275.1ms TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 23:40:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2021-06-05 23:40:17,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 3919. [2021-06-05 23:40:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-06-05 23:40:17,440 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-06-05 23:40:17,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:17,440 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-06-05 23:40:17,440 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 23:40:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-06-05 23:40:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:17,445 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:17,445 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:17,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 23:40:17,646 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:17,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:17,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1233841082, now seen corresponding path program 226 times [2021-06-05 23:40:17,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:17,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020810854] [2021-06-05 23:40:17,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:18,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020810854] [2021-06-05 23:40:18,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020810854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:18,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808367909] [2021-06-05 23:40:18,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:18,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:18,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:40:18,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:18,594 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 23:40:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:19,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808367909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:19,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:19,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:19,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006829243] [2021-06-05 23:40:19,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:19,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:19,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:19,071 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:19,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:19,690 INFO L93 Difference]: Finished difference Result 3997 states and 19173 transitions. [2021-06-05 23:40:19,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 23:40:19,691 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:19,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:19,700 INFO L225 Difference]: With dead ends: 3997 [2021-06-05 23:40:19,700 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 23:40:19,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1508.4ms TimeCoverageRelationStatistics Valid=157, Invalid=1649, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 23:40:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 23:40:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3919. [2021-06-05 23:40:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3919 states, 3918 states have (on average 4.840735068912711) internal successors, (18966), 3918 states have internal predecessors, (18966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3919 states to 3919 states and 18966 transitions. [2021-06-05 23:40:19,770 INFO L78 Accepts]: Start accepts. Automaton has 3919 states and 18966 transitions. Word has length 31 [2021-06-05 23:40:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:19,770 INFO L482 AbstractCegarLoop]: Abstraction has 3919 states and 18966 transitions. [2021-06-05 23:40:19,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3919 states and 18966 transitions. [2021-06-05 23:40:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:19,777 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:19,777 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:19,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-05 23:40:19,977 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:19,977 INFO L82 PathProgramCache]: Analyzing trace with hash 110356286, now seen corresponding path program 227 times [2021-06-05 23:40:19,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:19,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804181516] [2021-06-05 23:40:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:20,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804181516] [2021-06-05 23:40:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804181516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016806633] [2021-06-05 23:40:20,263 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:20,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 23:40:20,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 23:40:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:20,806 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-05 23:40:21,090 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 23:40:21,171 INFO L446 ElimStorePlain]: Different costs {0=[v_prenex_208, client], 1=[node_1]} [2021-06-05 23:40:21,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:21,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:21,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:21,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:21,238 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:21,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:21,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:40:21,300 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:21,306 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:40:21,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:40:21,308 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:21,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:21,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 3 dim-1 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2021-06-05 23:40:21,369 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:163, output treesize:125 [2021-06-05 23:40:25,466 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 70 [2021-06-05 23:40:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 23:40:25,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016806633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:25,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:25,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-06-05 23:40:25,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480377338] [2021-06-05 23:40:25,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:40:25,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:25,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:40:25,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=667, Unknown=1, NotChecked=0, Total=756 [2021-06-05 23:40:25,550 INFO L87 Difference]: Start difference. First operand 3919 states and 18966 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:25,994 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2021-06-05 23:40:27,875 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-06-05 23:40:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:30,150 INFO L93 Difference]: Finished difference Result 4125 states and 19314 transitions. [2021-06-05 23:40:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:40:30,150 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:40:30,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:30,158 INFO L225 Difference]: With dead ends: 4125 [2021-06-05 23:40:30,158 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 23:40:30,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 5529.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1403, Unknown=1, NotChecked=0, Total=1560 [2021-06-05 23:40:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 23:40:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3833. [2021-06-05 23:40:30,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.840814196242171) internal successors, (18550), 3832 states have internal predecessors, (18550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:30,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 18550 transitions. [2021-06-05 23:40:30,216 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 18550 transitions. Word has length 31 [2021-06-05 23:40:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:30,216 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 18550 transitions. [2021-06-05 23:40:30,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 18550 transitions. [2021-06-05 23:40:30,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:30,221 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:30,221 INFO L554 BasicCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:30,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 23:40:30,422 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:30,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:30,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1439139550, now seen corresponding path program 228 times [2021-06-05 23:40:30,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:30,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279205742] [2021-06-05 23:40:30,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 23:40:30,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:30,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279205742] [2021-06-05 23:40:30,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279205742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:30,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123341212] [2021-06-05 23:40:30,565 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:30,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 23:40:30,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:30,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 23:40:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:31,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:31,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:31,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:31,394 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:31,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:31,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 23:40:31,409 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:64, output treesize:50 [2021-06-05 23:40:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:31,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123341212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:31,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:31,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18] total 27 [2021-06-05 23:40:31,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128064055] [2021-06-05 23:40:31,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:40:31,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:31,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:40:31,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:40:31,470 INFO L87 Difference]: Start difference. First operand 3833 states and 18550 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 23:40:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:31,928 INFO L93 Difference]: Finished difference Result 6856 states and 32904 transitions. [2021-06-05 23:40:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 23:40:31,928 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 31 [2021-06-05 23:40:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:31,942 INFO L225 Difference]: With dead ends: 6856 [2021-06-05 23:40:31,942 INFO L226 Difference]: Without dead ends: 6795 [2021-06-05 23:40:31,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1011.9ms TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 23:40:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-06-05 23:40:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 4695. [2021-06-05 23:40:32,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.002556455048999) internal successors, (23482), 4694 states have internal predecessors, (23482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23482 transitions. [2021-06-05 23:40:32,029 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23482 transitions. Word has length 31 [2021-06-05 23:40:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:32,029 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23482 transitions. [2021-06-05 23:40:32,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 27 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 23:40:32,029 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23482 transitions. [2021-06-05 23:40:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:32,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:32,036 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:32,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:32,236 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:32,237 INFO L82 PathProgramCache]: Analyzing trace with hash 772594686, now seen corresponding path program 229 times [2021-06-05 23:40:32,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:32,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522661051] [2021-06-05 23:40:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:32,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:32,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522661051] [2021-06-05 23:40:32,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522661051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:32,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484362421] [2021-06-05 23:40:32,599 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:32,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:40:32,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:33,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484362421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:33,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:33,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:33,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075143575] [2021-06-05 23:40:33,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:33,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:33,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:33,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:33,588 INFO L87 Difference]: Start difference. First operand 4695 states and 23482 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:34,320 INFO L93 Difference]: Finished difference Result 4746 states and 23612 transitions. [2021-06-05 23:40:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:40:34,320 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:34,330 INFO L225 Difference]: With dead ends: 4746 [2021-06-05 23:40:34,330 INFO L226 Difference]: Without dead ends: 4733 [2021-06-05 23:40:34,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1461.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:40:34,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-06-05 23:40:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 4681. [2021-06-05 23:40:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 5.013034188034188) internal successors, (23461), 4680 states have internal predecessors, (23461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 23461 transitions. [2021-06-05 23:40:34,402 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 23461 transitions. Word has length 31 [2021-06-05 23:40:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:34,402 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 23461 transitions. [2021-06-05 23:40:34,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 23461 transitions. [2021-06-05 23:40:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:34,410 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:34,410 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:34,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 23:40:34,617 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1688987100, now seen corresponding path program 230 times [2021-06-05 23:40:34,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:34,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517123659] [2021-06-05 23:40:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:34,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:34,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517123659] [2021-06-05 23:40:34,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517123659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:34,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987257589] [2021-06-05 23:40:34,987 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:35,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:40:35,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:35,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:35,461 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-05 23:40:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:35,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987257589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:35,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:35,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:35,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64060094] [2021-06-05 23:40:35,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:35,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:35,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:35,976 INFO L87 Difference]: Start difference. First operand 4681 states and 23461 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:36,754 INFO L93 Difference]: Finished difference Result 4755 states and 23651 transitions. [2021-06-05 23:40:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 23:40:36,754 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:36,764 INFO L225 Difference]: With dead ends: 4755 [2021-06-05 23:40:36,764 INFO L226 Difference]: Without dead ends: 4742 [2021-06-05 23:40:36,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1645.2ms TimeCoverageRelationStatistics Valid=192, Invalid=1788, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 23:40:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2021-06-05 23:40:36,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2021-06-05 23:40:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4697 states, 4696 states have (on average 5.007027257240204) internal successors, (23513), 4696 states have internal predecessors, (23513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 23513 transitions. [2021-06-05 23:40:36,876 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 23513 transitions. Word has length 31 [2021-06-05 23:40:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:36,876 INFO L482 AbstractCegarLoop]: Abstraction has 4697 states and 23513 transitions. [2021-06-05 23:40:36,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:36,876 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 23513 transitions. [2021-06-05 23:40:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:36,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:36,883 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:37,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1039,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:37,084 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1029993974, now seen corresponding path program 231 times [2021-06-05 23:40:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:37,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282821595] [2021-06-05 23:40:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:37,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:37,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282821595] [2021-06-05 23:40:37,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282821595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:37,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944771419] [2021-06-05 23:40:37,428 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:37,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 23:40:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:37,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:37,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:37,949 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-06-05 23:40:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:38,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944771419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:38,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:38,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:38,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536217238] [2021-06-05 23:40:38,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:38,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:38,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:38,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:38,556 INFO L87 Difference]: Start difference. First operand 4697 states and 23513 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:39,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:39,307 INFO L93 Difference]: Finished difference Result 5035 states and 24640 transitions. [2021-06-05 23:40:39,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 23:40:39,308 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:39,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:39,319 INFO L225 Difference]: With dead ends: 5035 [2021-06-05 23:40:39,319 INFO L226 Difference]: Without dead ends: 5011 [2021-06-05 23:40:39,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1535.7ms TimeCoverageRelationStatistics Valid=194, Invalid=1528, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:40:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5011 states. [2021-06-05 23:40:39,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5011 to 4691. [2021-06-05 23:40:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 5.010234541577825) internal successors, (23498), 4690 states have internal predecessors, (23498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 23498 transitions. [2021-06-05 23:40:39,442 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 23498 transitions. Word has length 31 [2021-06-05 23:40:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:39,442 INFO L482 AbstractCegarLoop]: Abstraction has 4691 states and 23498 transitions. [2021-06-05 23:40:39,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 23498 transitions. [2021-06-05 23:40:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:39,449 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:39,449 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:39,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:39,649 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash 632601598, now seen corresponding path program 232 times [2021-06-05 23:40:39,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:39,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636626699] [2021-06-05 23:40:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:40,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:40,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636626699] [2021-06-05 23:40:40,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636626699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:40,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836590570] [2021-06-05 23:40:40,024 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:40,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:40:40,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:40,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 23:40:40,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:41,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836590570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:41,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:41,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:41,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992149992] [2021-06-05 23:40:41,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:41,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:41,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:41,094 INFO L87 Difference]: Start difference. First operand 4691 states and 23498 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:41,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:41,654 INFO L93 Difference]: Finished difference Result 4753 states and 23660 transitions. [2021-06-05 23:40:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 23:40:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:41,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:41,663 INFO L225 Difference]: With dead ends: 4753 [2021-06-05 23:40:41,664 INFO L226 Difference]: Without dead ends: 4744 [2021-06-05 23:40:41,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1412.0ms TimeCoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:40:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2021-06-05 23:40:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4695. [2021-06-05 23:40:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 4694 states have (on average 5.008308478909246) internal successors, (23509), 4694 states have internal predecessors, (23509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 23509 transitions. [2021-06-05 23:40:41,735 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 23509 transitions. Word has length 31 [2021-06-05 23:40:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:41,735 INFO L482 AbstractCegarLoop]: Abstraction has 4695 states and 23509 transitions. [2021-06-05 23:40:41,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 23509 transitions. [2021-06-05 23:40:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:41,742 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:41,742 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:41,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1047,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:41,942 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1503896890, now seen corresponding path program 233 times [2021-06-05 23:40:41,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:41,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206752768] [2021-06-05 23:40:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:42,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:42,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206752768] [2021-06-05 23:40:42,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206752768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:42,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984988602] [2021-06-05 23:40:42,437 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:42,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 23:40:42,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:42,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:40:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:42,977 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:40:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:43,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984988602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:43,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:43,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:43,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168526281] [2021-06-05 23:40:43,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:43,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:43,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1086, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:43,440 INFO L87 Difference]: Start difference. First operand 4695 states and 23509 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:43,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:43,967 INFO L93 Difference]: Finished difference Result 4748 states and 23630 transitions. [2021-06-05 23:40:43,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 23:40:43,968 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:43,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:43,977 INFO L225 Difference]: With dead ends: 4748 [2021-06-05 23:40:43,978 INFO L226 Difference]: Without dead ends: 4739 [2021-06-05 23:40:43,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1485.5ms TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 23:40:43,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4739 states. [2021-06-05 23:40:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4739 to 4684. [2021-06-05 23:40:44,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 5.014093529788597) internal successors, (23481), 4683 states have internal predecessors, (23481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:44,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 23481 transitions. [2021-06-05 23:40:44,049 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 23481 transitions. Word has length 31 [2021-06-05 23:40:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:44,049 INFO L482 AbstractCegarLoop]: Abstraction has 4684 states and 23481 transitions. [2021-06-05 23:40:44,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 23481 transitions. [2021-06-05 23:40:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:44,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:44,056 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:44,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1052,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:44,256 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:44,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:44,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1809097854, now seen corresponding path program 234 times [2021-06-05 23:40:44,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:44,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239421414] [2021-06-05 23:40:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:44,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:44,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239421414] [2021-06-05 23:40:44,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239421414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:44,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977533994] [2021-06-05 23:40:44,578 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:44,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 23:40:44,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:40:44,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 23:40:44,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:45,160 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2021-06-05 23:40:45,768 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:45,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977533994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:45,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:45,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-05 23:40:45,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621557240] [2021-06-05 23:40:45,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 23:40:45,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:45,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 23:40:45,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:40:45,769 INFO L87 Difference]: Start difference. First operand 4684 states and 23481 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:46,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:40:46,478 INFO L93 Difference]: Finished difference Result 4790 states and 23786 transitions. [2021-06-05 23:40:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 23:40:46,478 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 31 [2021-06-05 23:40:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:40:46,489 INFO L225 Difference]: With dead ends: 4790 [2021-06-05 23:40:46,489 INFO L226 Difference]: Without dead ends: 4768 [2021-06-05 23:40:46,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1553.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 23:40:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4768 states. [2021-06-05 23:40:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4768 to 4708. [2021-06-05 23:40:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4708 states, 4707 states have (on average 5.007435734013172) internal successors, (23570), 4707 states have internal predecessors, (23570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4708 states to 4708 states and 23570 transitions. [2021-06-05 23:40:46,572 INFO L78 Accepts]: Start accepts. Automaton has 4708 states and 23570 transitions. Word has length 31 [2021-06-05 23:40:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:40:46,572 INFO L482 AbstractCegarLoop]: Abstraction has 4708 states and 23570 transitions. [2021-06-05 23:40:46,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 34 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 23:40:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4708 states and 23570 transitions. [2021-06-05 23:40:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:40:46,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:40:46,580 INFO L554 BasicCegarLoop]: trace histogram [8, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:40:46,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1056 [2021-06-05 23:40:46,789 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:40:46,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:40:46,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1256388998, now seen corresponding path program 235 times [2021-06-05 23:40:46,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:40:46,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569335940] [2021-06-05 23:40:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:40:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:40:47,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:40:47,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569335940] [2021-06-05 23:40:47,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569335940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:47,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474644122] [2021-06-05 23:40:47,137 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:40:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:40:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:40:47,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:40:47,476 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-06-05 23:40:48,134 INFO L446 ElimStorePlain]: Different costs {0=[node_2, v_prenex_216], 1=[node_1]} [2021-06-05 23:40:48,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:48,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:48,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:48,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 23:40:48,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:48,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:48,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 23:40:48,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:40:48,261 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:48,267 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 23:40:48,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-06-05 23:40:48,269 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 23:40:48,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:40:48,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:40:48,314 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 10 variables, input treesize:153, output treesize:115 [2021-06-05 23:40:52,406 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 23:40:52,484 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:40:52,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474644122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:40:52,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:40:52,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 30 [2021-06-05 23:40:52,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673445039] [2021-06-05 23:40:52,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 23:40:52,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:40:52,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 23:40:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=832, Unknown=1, NotChecked=0, Total=930 [2021-06-05 23:40:52,485 INFO L87 Difference]: Start difference. First operand 4708 states and 23570 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:40:53,449 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2021-06-05 23:41:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:41:01,619 INFO L93 Difference]: Finished difference Result 4927 states and 24012 transitions. [2021-06-05 23:41:01,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 23:41:01,619 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 23:41:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:41:01,629 INFO L225 Difference]: With dead ends: 4927 [2021-06-05 23:41:01,629 INFO L226 Difference]: Without dead ends: 4913 [2021-06-05 23:41:01,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 5798.6ms TimeCoverageRelationStatistics Valid=170, Invalid=1635, Unknown=1, NotChecked=0, Total=1806 [2021-06-05 23:41:01,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-06-05 23:41:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4596. [2021-06-05 23:41:01,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4596 states, 4595 states have (on average 4.9910772578890095) internal successors, (22934), 4595 states have internal predecessors, (22934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4596 states to 4596 states and 22934 transitions. [2021-06-05 23:41:01,701 INFO L78 Accepts]: Start accepts. Automaton has 4596 states and 22934 transitions. Word has length 31 [2021-06-05 23:41:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:41:01,701 INFO L482 AbstractCegarLoop]: Abstraction has 4596 states and 22934 transitions. [2021-06-05 23:41:01,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:41:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4596 states and 22934 transitions. [2021-06-05 23:41:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 23:41:01,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:41:01,707 INFO L554 BasicCegarLoop]: trace histogram [9, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:41:01,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:01,908 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:41:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:41:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash 722766146, now seen corresponding path program 236 times [2021-06-05 23:41:01,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:41:01,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523575626] [2021-06-05 23:41:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:41:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:41:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:41:02,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:41:02,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523575626] [2021-06-05 23:41:02,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523575626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:41:02,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640692531] [2021-06-05 23:41:02,375 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:41:02,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:41:02,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:41:02,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 23:41:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 23:41:03,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1073 [2021-06-05 23:41:03,438 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 23:41:03,440 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:41:03,441 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 23:41:03,441 INFO L202 PluginConnector]: Adding new model commit-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:41:03 BasicIcfg [2021-06-05 23:41:03,441 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:41:03,442 INFO L168 Benchmark]: Toolchain (without parser) took 829285.43 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 924.8 MB). Free memory was 333.6 MB in the beginning and 841.0 MB in the end (delta: -507.4 MB). Peak memory consumption was 421.6 MB. Max. memory is 16.0 GB. [2021-06-05 23:41:03,442 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.0 MB in the beginning and 334.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:41:03,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.76 ms. Allocated memory is still 354.4 MB. Free memory was 333.5 MB in the beginning and 332.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:41:03,442 INFO L168 Benchmark]: Boogie Preprocessor took 26.49 ms. Allocated memory is still 354.4 MB. Free memory was 332.0 MB in the beginning and 330.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:41:03,442 INFO L168 Benchmark]: RCFGBuilder took 563.26 ms. Allocated memory is still 354.4 MB. Free memory was 330.8 MB in the beginning and 317.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-06-05 23:41:03,442 INFO L168 Benchmark]: TraceAbstraction took 828664.94 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 924.8 MB). Free memory was 317.8 MB in the beginning and 841.0 MB in the end (delta: -523.2 MB). Peak memory consumption was 402.7 MB. Max. memory is 16.0 GB. [2021-06-05 23:41:03,442 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 354.4 MB. Free memory was 335.0 MB in the beginning and 334.9 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.76 ms. Allocated memory is still 354.4 MB. Free memory was 333.5 MB in the beginning and 332.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.49 ms. Allocated memory is still 354.4 MB. Free memory was 332.0 MB in the beginning and 330.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 563.26 ms. Allocated memory is still 354.4 MB. Free memory was 330.8 MB in the beginning and 317.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 828664.94 ms. Allocated memory was 354.4 MB in the beginning and 1.3 GB in the end (delta: 924.8 MB). Free memory was 317.8 MB in the beginning and 841.0 MB in the end (delta: -523.2 MB). Peak memory consumption was 402.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 172]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 32 with TraceHistMax 9,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 34 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 34 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 828578.5ms, OverallIterations: 279, TraceHistogramMax: 9, EmptinessCheckTime: 710.8ms, AutomataDifference: 368022.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10909 SDtfs, 18385 SDslu, 148804 SDs, 0 SdLazy, 87501 SolverSat, 5117 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 84483.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11900 GetRequests, 4272 SyntacticMatches, 10 SemanticMatches, 7618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41659 ImplicationChecksByTransitivity, 605387.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4708occurred in iteration=277, InterpolantAutomatonStates: 4471, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6788.7ms AutomataMinimizationTime, 278 MinimizatonAttempts, 48248 StatesRemovedByMinimization, 273 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2430.0ms SsaConstructionTime, 7317.3ms SatisfiabilityAnalysisTime, 378938.9ms InterpolantComputationTime, 14308 NumberOfCodeBlocks, 14307 NumberOfCodeBlocksAsserted, 1238 NumberOfCheckSat, 13756 ConstructedInterpolants, 790 QuantifiedInterpolants, 286317 SizeOfPredicates, 3714 NumberOfNonLiveVariables, 20821 ConjunctsInSsa, 5183 ConjunctsInUnsatCore, 552 InterpolantComputations, 4 PerfectInterpolantSequences, 1946/15772 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown