/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-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 23:26:47,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 23:26:47,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 23:26:47,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 23:26:47,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 23:26:47,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 23:26:47,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 23:26:47,731 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 23:26:47,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 23:26:47,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 23:26:47,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 23:26:47,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 23:26:47,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 23:26:47,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 23:26:47,769 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 23:26:47,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 23:26:47,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 23:26:47,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 23:26:47,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 23:26:47,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 23:26:47,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 23:26:47,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 23:26:47,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 23:26:47,771 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 23:26:47,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 23:26:47,771 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 23:26:47,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 23:26:47,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 23:26:47,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 23:26:47,772 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 23:26:47,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 23:26:47,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 23:26:47,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 23:26:47,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 23:26:47,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 23:26:47,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 23:26:47,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 23:26:47,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 23:26:47,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 23:26:47,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 23:26:48,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 23:26:48,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 23:26:48,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 23:26:48,100 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 23:26:48,101 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 23:26:48,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2021-06-05 23:26:48,102 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-06-05 23:26:48,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 23:26:48,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 23:26:48,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 23:26:48,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 23:26:48,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 23:26:48,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 23:26:48,174 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 23:26:48,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 23:26:48,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 23:26:48,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,193 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,202 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/1) ... [2021-06-05 23:26:48,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 23:26:48,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 23:26:48,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 23:26:48,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 23:26:48,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (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 23:26:48,287 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 23:26:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 23:26:48,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 23:26:48,288 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 23:26:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 23:26:48,288 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 23:26:48,288 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 23:26:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 23:26:48,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 23:26:48,289 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 23:26:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 23:26:48,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 23:26:48,290 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 23:26:48,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 23:26:48,727 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 23:26:48,728 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 23:26:48,728 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 23:26:48,728 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 23:26:48,729 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:26:48 BoogieIcfgContainer [2021-06-05 23:26:48,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 23:26:48,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 23:26:48,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 23:26:48,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 23:26:48,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 11:26:48" (1/2) ... [2021-06-05 23:26:48,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e00f6fa and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 11:26:48, skipping insertion in model container [2021-06-05 23:26:48,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 11:26:48" (2/2) ... [2021-06-05 23:26:48,735 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-06-05 23:26:48,740 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 23:26:48,740 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 23:26:48,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 23:26:48,741 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 23:26:48,787 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 23:26:48,806 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 23:26:48,821 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 23:26:48,822 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 23:26:48,822 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 23:26:48,822 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 23:26:48,822 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 23:26:48,822 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 23:26:48,822 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 23:26:48,822 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 23:26:48,830 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2021-06-05 23:26:48,839 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 23:26:48,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:48,846 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:48,847 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash -628206710, now seen corresponding path program 1 times [2021-06-05 23:26:48,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:48,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447478623] [2021-06-05 23:26:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:48,971 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 23:26:48,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:48,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447478623] [2021-06-05 23:26:48,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447478623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:26:48,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:26:48,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:26:48,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507652666] [2021-06-05 23:26:48,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:26:48,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:48,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:26:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:26:48,994 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:49,029 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2021-06-05 23:26:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:26:49,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 23:26:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:49,041 INFO L225 Difference]: With dead ends: 46 [2021-06-05 23:26:49,041 INFO L226 Difference]: Without dead ends: 42 [2021-06-05 23:26:49,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:26:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-05 23:26:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-06-05 23:26:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2021-06-05 23:26:49,088 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2021-06-05 23:26:49,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:49,089 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2021-06-05 23:26:49,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,089 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2021-06-05 23:26:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 23:26:49,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:49,092 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:49,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 23:26:49,092 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:49,095 INFO L82 PathProgramCache]: Analyzing trace with hash 402586222, now seen corresponding path program 1 times [2021-06-05 23:26:49,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:49,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023882625] [2021-06-05 23:26:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:49,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:49,173 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 23:26:49,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:49,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023882625] [2021-06-05 23:26:49,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023882625] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:26:49,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:26:49,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:26:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589796993] [2021-06-05 23:26:49,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:26:49,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:49,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:26:49,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:26:49,179 INFO L87 Difference]: Start difference. First operand 42 states and 109 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:49,196 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2021-06-05 23:26:49,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:26:49,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 23:26:49,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:49,198 INFO L225 Difference]: With dead ends: 59 [2021-06-05 23:26:49,198 INFO L226 Difference]: Without dead ends: 57 [2021-06-05 23:26:49,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:26:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-06-05 23:26:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-06-05 23:26:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-06-05 23:26:49,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2021-06-05 23:26:49,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:49,216 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-06-05 23:26:49,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-06-05 23:26:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 23:26:49,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:49,218 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:49,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 23:26:49,219 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:49,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:49,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1959261122, now seen corresponding path program 1 times [2021-06-05 23:26:49,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:49,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718388233] [2021-06-05 23:26:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:49,285 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 23:26:49,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:49,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718388233] [2021-06-05 23:26:49,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718388233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:49,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372533900] [2021-06-05 23:26:49,286 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 23:26:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:49,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:26:49,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:49,519 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 23:26:49,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372533900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:49,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:49,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 23:26:49,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038503956] [2021-06-05 23:26:49,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:26:49,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:26:49,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:26:49,521 INFO L87 Difference]: Start difference. First operand 46 states and 115 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 23:26:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:49,538 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2021-06-05 23:26:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:26:49,538 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 13 [2021-06-05 23:26:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:49,539 INFO L225 Difference]: With dead ends: 65 [2021-06-05 23:26:49,539 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 23:26:49,540 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:26:49,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 23:26:49,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-06-05 23:26:49,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 52 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2021-06-05 23:26:49,546 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2021-06-05 23:26:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:49,546 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2021-06-05 23:26:49,546 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 23:26:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2021-06-05 23:26:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 23:26:49,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:49,547 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:49,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 23:26:49,770 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:49,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:49,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1085270368, now seen corresponding path program 1 times [2021-06-05 23:26:49,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:49,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253731080] [2021-06-05 23:26:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:49,813 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 23:26:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:49,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253731080] [2021-06-05 23:26:49,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253731080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:49,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051614362] [2021-06-05 23:26:49,816 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 23:26:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:49,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 23:26:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:49,941 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 23:26:49,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051614362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:49,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:49,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 23:26:49,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084502800] [2021-06-05 23:26:49,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 23:26:49,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 23:26:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:26:49,943 INFO L87 Difference]: Start difference. First operand 53 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:49,965 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2021-06-05 23:26:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:26:49,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 23:26:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:49,969 INFO L225 Difference]: With dead ends: 68 [2021-06-05 23:26:49,969 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 23:26:49,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 23:26:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 23:26:49,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-06-05 23:26:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2021-06-05 23:26:49,981 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2021-06-05 23:26:49,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:49,982 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2021-06-05 23:26:49,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2021-06-05 23:26:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 23:26:49,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:49,984 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:50,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:50,208 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash -242961336, now seen corresponding path program 1 times [2021-06-05 23:26:50,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:50,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597574979] [2021-06-05 23:26:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:50,233 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 23:26:50,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:50,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597574979] [2021-06-05 23:26:50,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597574979] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:26:50,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:26:50,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 23:26:50,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776956306] [2021-06-05 23:26:50,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 23:26:50,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:50,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 23:26:50,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:26:50,235 INFO L87 Difference]: Start difference. First operand 49 states and 126 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:50,241 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2021-06-05 23:26:50,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 23:26:50,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 23:26:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:50,242 INFO L225 Difference]: With dead ends: 29 [2021-06-05 23:26:50,242 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 23:26:50,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 23:26:50,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 23:26:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 23:26:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2021-06-05 23:26:50,244 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2021-06-05 23:26:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:50,245 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2021-06-05 23:26:50,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2021-06-05 23:26:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 23:26:50,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:50,245 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:50,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 23:26:50,246 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:50,246 INFO L82 PathProgramCache]: Analyzing trace with hash -757524308, now seen corresponding path program 1 times [2021-06-05 23:26:50,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:50,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414313945] [2021-06-05 23:26:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:50,286 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 23:26:50,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:50,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414313945] [2021-06-05 23:26:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414313945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137336931] [2021-06-05 23:26:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:50,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 23:26:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:50,383 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 23:26:50,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137336931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:50,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:50,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-06-05 23:26:50,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381704139] [2021-06-05 23:26:50,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 23:26:50,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:50,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 23:26:50,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 23:26:50,385 INFO L87 Difference]: Start difference. First operand 28 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:50,422 INFO L93 Difference]: Finished difference Result 47 states and 113 transitions. [2021-06-05 23:26:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 23:26:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 23:26:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:50,424 INFO L225 Difference]: With dead ends: 47 [2021-06-05 23:26:50,424 INFO L226 Difference]: Without dead ends: 43 [2021-06-05 23:26:50,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 23:26:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-06-05 23:26:50,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-06-05 23:26:50,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 103 transitions. [2021-06-05 23:26:50,440 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 103 transitions. Word has length 14 [2021-06-05 23:26:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:50,440 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 103 transitions. [2021-06-05 23:26:50,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 103 transitions. [2021-06-05 23:26:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:26:50,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:50,444 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:50,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:50,653 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:50,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:50,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1436036254, now seen corresponding path program 1 times [2021-06-05 23:26:50,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:50,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903727679] [2021-06-05 23:26:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:50,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:50,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903727679] [2021-06-05 23:26:50,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903727679] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 23:26:50,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 23:26:50,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 23:26:50,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859864305] [2021-06-05 23:26:50,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 23:26:50,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:50,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 23:26:50,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:26:50,701 INFO L87 Difference]: Start difference. First operand 42 states and 103 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:50,714 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-06-05 23:26:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 23:26:50,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 23:26:50,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:50,716 INFO L225 Difference]: With dead ends: 60 [2021-06-05 23:26:50,716 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 23:26:50,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 23:26:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 23:26:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-06-05 23:26:50,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-06-05 23:26:50,720 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2021-06-05 23:26:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:50,721 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-06-05 23:26:50,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-06-05 23:26:50,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:26:50,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:50,722 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:50,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 23:26:50,723 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:50,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:50,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2049584416, now seen corresponding path program 2 times [2021-06-05 23:26:50,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:50,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535416770] [2021-06-05 23:26:50,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:50,826 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 23:26:50,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535416770] [2021-06-05 23:26:50,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535416770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:50,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589600728] [2021-06-05 23:26:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:50,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:26:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:50,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:26:50,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:50,973 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 23:26:50,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589600728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:50,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:50,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 23:26:50,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125736208] [2021-06-05 23:26:50,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:26:50,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:50,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:26:50,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:26:50,975 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:51,044 INFO L93 Difference]: Finished difference Result 77 states and 188 transitions. [2021-06-05 23:26:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:26:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 23:26:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:51,045 INFO L225 Difference]: With dead ends: 77 [2021-06-05 23:26:51,045 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 23:26:51,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:26:51,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 23:26:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-06-05 23:26:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2021-06-05 23:26:51,048 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 15 [2021-06-05 23:26:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:51,049 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2021-06-05 23:26:51,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2021-06-05 23:26:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 23:26:51,049 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:51,049 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:51,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:51,265 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash 833536548, now seen corresponding path program 3 times [2021-06-05 23:26:51,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:51,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490275365] [2021-06-05 23:26:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:51,349 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 23:26:51,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:51,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490275365] [2021-06-05 23:26:51,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490275365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:51,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981883844] [2021-06-05 23:26:51,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:51,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 23:26:51,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:51,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 23:26:51,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:51,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981883844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:51,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:51,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 23:26:51,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770011585] [2021-06-05 23:26:51,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 23:26:51,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:51,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 23:26:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 23:26:51,619 INFO L87 Difference]: Start difference. First operand 51 states and 129 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 23:26:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:51,713 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2021-06-05 23:26:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:26:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 15 [2021-06-05 23:26:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:51,716 INFO L225 Difference]: With dead ends: 80 [2021-06-05 23:26:51,716 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 23:26:51,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:26:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 23:26:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-06-05 23:26:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 56 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 151 transitions. [2021-06-05 23:26:51,723 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 151 transitions. Word has length 15 [2021-06-05 23:26:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:51,724 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 151 transitions. [2021-06-05 23:26:51,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 23:26:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 151 transitions. [2021-06-05 23:26:51,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:26:51,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:51,725 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:51,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:51,949 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash 36878570, now seen corresponding path program 2 times [2021-06-05 23:26:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:51,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780715796] [2021-06-05 23:26:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:52,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:52,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780715796] [2021-06-05 23:26:52,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780715796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:52,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545502102] [2021-06-05 23:26:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:26:52,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:26:52,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:52,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:26:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:52,369 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 23:26:52,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545502102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:52,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:52,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 23:26:52,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724355070] [2021-06-05 23:26:52,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:26:52,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:52,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:26:52,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:26:52,372 INFO L87 Difference]: Start difference. First operand 57 states and 151 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:52,584 INFO L93 Difference]: Finished difference Result 118 states and 329 transitions. [2021-06-05 23:26:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:26:52,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 23:26:52,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:52,587 INFO L225 Difference]: With dead ends: 118 [2021-06-05 23:26:52,587 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 23:26:52,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:26:52,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 23:26:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-06-05 23:26:52,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 74 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 227 transitions. [2021-06-05 23:26:52,590 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 227 transitions. Word has length 16 [2021-06-05 23:26:52,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:52,591 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 227 transitions. [2021-06-05 23:26:52,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:52,591 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 227 transitions. [2021-06-05 23:26:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 23:26:52,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:52,591 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:52,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:52,800 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:52,800 INFO L82 PathProgramCache]: Analyzing trace with hash 846225196, now seen corresponding path program 4 times [2021-06-05 23:26:52,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:52,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628302747] [2021-06-05 23:26:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:52,899 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 23:26:52,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:52,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628302747] [2021-06-05 23:26:52,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628302747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:52,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918476559] [2021-06-05 23:26:52,899 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 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 23:26:53,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:26:53,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:53,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:26:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:53,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918476559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:53,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:53,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 23:26:53,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939014824] [2021-06-05 23:26:53,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:26:53,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:53,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:26:53,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:26:53,157 INFO L87 Difference]: Start difference. First operand 75 states and 227 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 23:26:53,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:53,210 INFO L93 Difference]: Finished difference Result 80 states and 225 transitions. [2021-06-05 23:26:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 23:26:53,211 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 16 [2021-06-05 23:26:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:53,212 INFO L225 Difference]: With dead ends: 80 [2021-06-05 23:26:53,212 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 23:26:53,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:26:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 23:26:53,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-06-05 23:26:53,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 209 transitions. [2021-06-05 23:26:53,215 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 209 transitions. Word has length 16 [2021-06-05 23:26:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:53,216 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 209 transitions. [2021-06-05 23:26:53,216 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 23:26:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 209 transitions. [2021-06-05 23:26:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:26:53,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:53,216 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:53,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 23:26:53,433 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash 292721696, now seen corresponding path program 3 times [2021-06-05 23:26:53,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:53,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826422613] [2021-06-05 23:26:53,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:53,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:53,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826422613] [2021-06-05 23:26:53,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826422613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:53,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286467178] [2021-06-05 23:26:53,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:53,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 23:26:53,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:53,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:26:53,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286467178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:53,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:53,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 23:26:53,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949202030] [2021-06-05 23:26:53,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 23:26:53,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 23:26:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 23:26:53,803 INFO L87 Difference]: Start difference. First operand 72 states and 209 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:53,983 INFO L93 Difference]: Finished difference Result 130 states and 354 transitions. [2021-06-05 23:26:53,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:26:53,984 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:26:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:53,985 INFO L225 Difference]: With dead ends: 130 [2021-06-05 23:26:53,985 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 23:26:53,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:26:53,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 23:26:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2021-06-05 23:26:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 3.075) internal successors, (246), 80 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 246 transitions. [2021-06-05 23:26:53,991 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 246 transitions. Word has length 17 [2021-06-05 23:26:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:53,991 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 246 transitions. [2021-06-05 23:26:53,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:53,991 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 246 transitions. [2021-06-05 23:26:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:26:53,992 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:53,992 INFO L554 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:54,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 23:26:54,216 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:54,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:54,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1102068322, now seen corresponding path program 4 times [2021-06-05 23:26:54,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:54,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807756963] [2021-06-05 23:26:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:54,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:54,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807756963] [2021-06-05 23:26:54,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807756963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:54,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317594029] [2021-06-05 23:26:54,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:54,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:26:54,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:26:54,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:54,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317594029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:54,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:54,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 23:26:54,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204935983] [2021-06-05 23:26:54,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 23:26:54,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 23:26:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 23:26:54,507 INFO L87 Difference]: Start difference. First operand 81 states and 246 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:54,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:54,660 INFO L93 Difference]: Finished difference Result 94 states and 267 transitions. [2021-06-05 23:26:54,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 23:26:54,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:26:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:54,661 INFO L225 Difference]: With dead ends: 94 [2021-06-05 23:26:54,661 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 23:26:54,661 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:26:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 23:26:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-06-05 23:26:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 3.049382716049383) internal successors, (247), 81 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 247 transitions. [2021-06-05 23:26:54,664 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 247 transitions. Word has length 17 [2021-06-05 23:26:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:54,665 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 247 transitions. [2021-06-05 23:26:54,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 247 transitions. [2021-06-05 23:26:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 23:26:54,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:54,665 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:54,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:54,891 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1878688318, now seen corresponding path program 5 times [2021-06-05 23:26:54,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:54,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479497364] [2021-06-05 23:26:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:54,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:54,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479497364] [2021-06-05 23:26:54,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479497364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:54,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682085108] [2021-06-05 23:26:54,961 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 23:26:55,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:26:55,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:55,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 23:26:55,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:55,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682085108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:55,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:55,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 23:26:55,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930003699] [2021-06-05 23:26:55,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 23:26:55,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 23:26:55,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:26:55,131 INFO L87 Difference]: Start difference. First operand 82 states and 247 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:55,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:55,156 INFO L93 Difference]: Finished difference Result 110 states and 254 transitions. [2021-06-05 23:26:55,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:26:55,157 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 23:26:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:55,157 INFO L225 Difference]: With dead ends: 110 [2021-06-05 23:26:55,157 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 23:26:55,157 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 23:26:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 23:26:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2021-06-05 23:26:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:55,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 179 transitions. [2021-06-05 23:26:55,160 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 179 transitions. Word has length 17 [2021-06-05 23:26:55,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:55,160 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 179 transitions. [2021-06-05 23:26:55,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:55,160 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 179 transitions. [2021-06-05 23:26:55,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:26:55,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:55,161 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:55,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:55,383 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:55,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:55,383 INFO L82 PathProgramCache]: Analyzing trace with hash -366075990, now seen corresponding path program 5 times [2021-06-05 23:26:55,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:55,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819945424] [2021-06-05 23:26:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:55,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:55,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819945424] [2021-06-05 23:26:55,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819945424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:55,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423465901] [2021-06-05 23:26:55,449 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 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 23:26:55,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 23:26:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:55,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:26:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:55,693 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 23:26:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423465901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:55,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:55,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-05 23:26:55,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727061604] [2021-06-05 23:26:55,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 23:26:55,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:55,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 23:26:55,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 23:26:55,696 INFO L87 Difference]: Start difference. First operand 69 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:55,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:55,821 INFO L93 Difference]: Finished difference Result 190 states and 501 transitions. [2021-06-05 23:26:55,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:26:55,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 23:26:55,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:55,823 INFO L225 Difference]: With dead ends: 190 [2021-06-05 23:26:55,823 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 23:26:55,825 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:26:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 23:26:55,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 106. [2021-06-05 23:26:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.1333333333333333) internal successors, (329), 105 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:55,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 329 transitions. [2021-06-05 23:26:55,829 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 329 transitions. Word has length 18 [2021-06-05 23:26:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:55,829 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 329 transitions. [2021-06-05 23:26:55,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 329 transitions. [2021-06-05 23:26:55,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 23:26:55,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:55,830 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:56,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 23:26:56,041 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:56,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:56,041 INFO L82 PathProgramCache]: Analyzing trace with hash 443270636, now seen corresponding path program 6 times [2021-06-05 23:26:56,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:56,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857874878] [2021-06-05 23:26:56,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:56,157 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 23:26:56,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:56,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857874878] [2021-06-05 23:26:56,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857874878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:56,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67093710] [2021-06-05 23:26:56,158 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 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 23:26:56,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 23:26:56,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 23:26:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:56,381 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 23:26:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67093710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:56,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:56,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 23:26:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831377086] [2021-06-05 23:26:56,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 23:26:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 23:26:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-06-05 23:26:56,383 INFO L87 Difference]: Start difference. First operand 106 states and 329 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 23:26:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:56,460 INFO L93 Difference]: Finished difference Result 120 states and 354 transitions. [2021-06-05 23:26:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 23:26:56,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 23:26:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:56,461 INFO L225 Difference]: With dead ends: 120 [2021-06-05 23:26:56,461 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 23:26:56,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 220.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:26:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 23:26:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-06-05 23:26:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 3.074074074074074) internal successors, (332), 108 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:56,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 332 transitions. [2021-06-05 23:26:56,465 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 332 transitions. Word has length 18 [2021-06-05 23:26:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:56,465 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 332 transitions. [2021-06-05 23:26:56,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 23:26:56,465 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 332 transitions. [2021-06-05 23:26:56,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:26:56,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:56,465 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:56,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:56,681 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 5973854, now seen corresponding path program 7 times [2021-06-05 23:26:56,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:56,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23724723] [2021-06-05 23:26:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:56,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:56,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23724723] [2021-06-05 23:26:56,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23724723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:56,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349720952] [2021-06-05 23:26:56,773 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 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 23:26:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:56,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 23:26:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:57,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349720952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:57,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:57,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 23:26:57,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177131515] [2021-06-05 23:26:57,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 23:26:57,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:57,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 23:26:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 23:26:57,094 INFO L87 Difference]: Start difference. First operand 109 states and 332 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 23:26:57,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:57,247 INFO L93 Difference]: Finished difference Result 60 states and 141 transitions. [2021-06-05 23:26:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 23:26:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 23:26:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:57,248 INFO L225 Difference]: With dead ends: 60 [2021-06-05 23:26:57,248 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 23:26:57,248 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:26:57,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 23:26:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-06-05 23:26:57,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:57,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 134 transitions. [2021-06-05 23:26:57,250 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 134 transitions. Word has length 19 [2021-06-05 23:26:57,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:57,250 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 134 transitions. [2021-06-05 23:26:57,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 23:26:57,250 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 134 transitions. [2021-06-05 23:26:57,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 23:26:57,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:57,251 INFO L554 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:57,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 23:26:57,451 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:57,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:57,452 INFO L82 PathProgramCache]: Analyzing trace with hash 815320480, now seen corresponding path program 8 times [2021-06-05 23:26:57,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:57,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125109974] [2021-06-05 23:26:57,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:57,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:57,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125109974] [2021-06-05 23:26:57,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125109974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:57,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106985377] [2021-06-05 23:26:57,591 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 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 23:26:57,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:26:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:26:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:57,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106985377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:57,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:57,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 23:26:57,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259112127] [2021-06-05 23:26:57,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 23:26:57,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:57,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 23:26:57,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 23:26:57,951 INFO L87 Difference]: Start difference. First operand 55 states and 134 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:58,109 INFO L93 Difference]: Finished difference Result 71 states and 176 transitions. [2021-06-05 23:26:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:26:58,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 23:26:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:58,110 INFO L225 Difference]: With dead ends: 71 [2021-06-05 23:26:58,110 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 23:26:58,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:26:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 23:26:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-06-05 23:26:58,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.564516129032258) internal successors, (159), 62 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-06-05 23:26:58,112 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 19 [2021-06-05 23:26:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:58,112 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-06-05 23:26:58,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-06-05 23:26:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:26:58,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:58,113 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:58,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:26:58,329 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1345382870, now seen corresponding path program 9 times [2021-06-05 23:26:58,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:58,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481468303] [2021-06-05 23:26:58,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:58,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:58,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481468303] [2021-06-05 23:26:58,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481468303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:58,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495595193] [2021-06-05 23:26:58,427 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 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 23:26:58,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 23:26:58,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:58,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 23:26:58,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:58,712 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 23:26:58,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:26:58,719 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 23:26:58,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:26:58,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:26:58,759 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 23:26:58,759 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-06-05 23:26:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:26:58,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495595193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:58,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:58,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 23:26:58,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524958467] [2021-06-05 23:26:58,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:26:58,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:58,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:26:58,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:26:58,866 INFO L87 Difference]: Start difference. First operand 63 states and 159 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 23:26:59,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:26:59,203 INFO L93 Difference]: Finished difference Result 392 states and 980 transitions. [2021-06-05 23:26:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:26:59,204 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 23:26:59,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:26:59,206 INFO L225 Difference]: With dead ends: 392 [2021-06-05 23:26:59,206 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 23:26:59,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:26:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 23:26:59,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 137. [2021-06-05 23:26:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.25) internal successors, (442), 136 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:26:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 442 transitions. [2021-06-05 23:26:59,212 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 442 transitions. Word has length 20 [2021-06-05 23:26:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:26:59,212 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 442 transitions. [2021-06-05 23:26:59,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 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 23:26:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 442 transitions. [2021-06-05 23:26:59,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 23:26:59,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:26:59,213 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:26:59,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 23:26:59,429 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:26:59,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:26:59,429 INFO L82 PathProgramCache]: Analyzing trace with hash -536036244, now seen corresponding path program 10 times [2021-06-05 23:26:59,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:26:59,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129284229] [2021-06-05 23:26:59,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:26:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:26:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:59,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:26:59,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129284229] [2021-06-05 23:26:59,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129284229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:59,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764148928] [2021-06-05 23:26:59,554 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 23:26:59,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:26:59,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:26:59,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 23:26:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:26:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:26:59,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764148928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:26:59,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:26:59,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:26:59,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876304777] [2021-06-05 23:26:59,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:26:59,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:26:59,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:26:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:26:59,960 INFO L87 Difference]: Start difference. First operand 137 states and 442 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 23:27:00,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:00,115 INFO L93 Difference]: Finished difference Result 96 states and 272 transitions. [2021-06-05 23:27:00,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:27:00,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 23:27:00,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:00,116 INFO L225 Difference]: With dead ends: 96 [2021-06-05 23:27:00,116 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 23:27:00,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:00,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 23:27:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-06-05 23:27:00,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.9529411764705884) internal successors, (251), 85 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 251 transitions. [2021-06-05 23:27:00,119 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 251 transitions. Word has length 20 [2021-06-05 23:27:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:00,119 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 251 transitions. [2021-06-05 23:27:00,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 23:27:00,119 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 251 transitions. [2021-06-05 23:27:00,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:00,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:00,120 INFO L554 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:00,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:00,333 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:00,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:00,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1129551998, now seen corresponding path program 11 times [2021-06-05 23:27:00,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:00,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167049346] [2021-06-05 23:27:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:00,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:00,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167049346] [2021-06-05 23:27:00,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167049346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:00,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970786611] [2021-06-05 23:27:00,508 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 23:27:00,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:27:00,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:00,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:27:00,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:00,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:00,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970786611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:00,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:00,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 23:27:00,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564825389] [2021-06-05 23:27:00,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 23:27:00,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:00,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 23:27:00,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:27:00,994 INFO L87 Difference]: Start difference. First operand 86 states and 251 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 23:27:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:01,070 INFO L93 Difference]: Finished difference Result 93 states and 262 transitions. [2021-06-05 23:27:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 23:27:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 23:27:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:01,071 INFO L225 Difference]: With dead ends: 93 [2021-06-05 23:27:01,071 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 23:27:01,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 23:27:01,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 23:27:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-06-05 23:27:01,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.929411764705882) internal successors, (249), 85 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 249 transitions. [2021-06-05 23:27:01,074 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 249 transitions. Word has length 21 [2021-06-05 23:27:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:01,075 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 249 transitions. [2021-06-05 23:27:01,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 23:27:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 249 transitions. [2021-06-05 23:27:01,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 23:27:01,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:01,075 INFO L554 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:01,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 23:27:01,289 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:01,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:01,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2003542752, now seen corresponding path program 12 times [2021-06-05 23:27:01,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:01,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533488846] [2021-06-05 23:27:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:01,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:01,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533488846] [2021-06-05 23:27:01,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533488846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:01,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932051049] [2021-06-05 23:27:01,387 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 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 23:27:01,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 23:27:01,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 23:27:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:01,645 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 23:27:01,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:01,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:01,677 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 23:27:01,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:01,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:01,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:01,724 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-06-05 23:27:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:01,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932051049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:01,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:01,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 23:27:01,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300595697] [2021-06-05 23:27:01,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 23:27:01,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 23:27:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 23:27:01,964 INFO L87 Difference]: Start difference. First operand 86 states and 249 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23:27:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:02,043 INFO L93 Difference]: Finished difference Result 106 states and 294 transitions. [2021-06-05 23:27:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 23:27:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 21 [2021-06-05 23:27:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:02,045 INFO L225 Difference]: With dead ends: 106 [2021-06-05 23:27:02,045 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 23:27:02,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:02,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 23:27:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-06-05 23:27:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.891304347826087) internal successors, (266), 92 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 266 transitions. [2021-06-05 23:27:02,048 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 266 transitions. Word has length 21 [2021-06-05 23:27:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:02,048 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 266 transitions. [2021-06-05 23:27:02,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 23:27:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 266 transitions. [2021-06-05 23:27:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:02,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:02,048 INFO L554 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:02,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 23:27:02,261 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:02,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:02,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2021450516, now seen corresponding path program 13 times [2021-06-05 23:27:02,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:02,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051089133] [2021-06-05 23:27:02,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:02,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:02,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051089133] [2021-06-05 23:27:02,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051089133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:02,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867863630] [2021-06-05 23:27:02,437 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 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 23:27:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 23:27:02,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:02,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867863630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:02,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:02,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-06-05 23:27:02,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159083277] [2021-06-05 23:27:02,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 23:27:02,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:02,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 23:27:02,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 23:27:02,970 INFO L87 Difference]: Start difference. First operand 93 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 23:27:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:03,261 INFO L93 Difference]: Finished difference Result 132 states and 353 transitions. [2021-06-05 23:27:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 23:27:03,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 23:27:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:03,262 INFO L225 Difference]: With dead ends: 132 [2021-06-05 23:27:03,262 INFO L226 Difference]: Without dead ends: 126 [2021-06-05 23:27:03,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 23:27:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-06-05 23:27:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-06-05 23:27:03,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.92) internal successors, (292), 100 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:03,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 292 transitions. [2021-06-05 23:27:03,266 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 292 transitions. Word has length 22 [2021-06-05 23:27:03,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:03,266 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 292 transitions. [2021-06-05 23:27:03,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 23:27:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 292 transitions. [2021-06-05 23:27:03,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 23:27:03,267 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:03,267 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:03,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:03,489 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:03,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:03,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1399526026, now seen corresponding path program 14 times [2021-06-05 23:27:03,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:03,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628736312] [2021-06-05 23:27:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:03,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:03,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628736312] [2021-06-05 23:27:03,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628736312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:03,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657953916] [2021-06-05 23:27:03,585 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 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 23:27:03,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 23:27:03,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:03,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 23:27:03,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:03,848 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 23:27:03,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:03,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:03,881 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 23:27:03,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 23:27:03,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 23:27:03,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-06-05 23:27:03,920 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-06-05 23:27:05,858 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 23:27:06,808 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-06-05 23:27:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 23:27:06,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657953916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:06,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:06,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 23:27:06,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511486230] [2021-06-05 23:27:06,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 23:27:06,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 23:27:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 23:27:06,818 INFO L87 Difference]: Start difference. First operand 101 states and 292 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:06,981 INFO L93 Difference]: Finished difference Result 230 states and 668 transitions. [2021-06-05 23:27:06,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 23:27:06,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 23:27:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:06,983 INFO L225 Difference]: With dead ends: 230 [2021-06-05 23:27:06,983 INFO L226 Difference]: Without dead ends: 215 [2021-06-05 23:27:06,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3042.4ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 23:27:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-06-05 23:27:06,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2021-06-05 23:27:06,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.324324324324324) internal successors, (492), 148 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 492 transitions. [2021-06-05 23:27:06,989 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 492 transitions. Word has length 22 [2021-06-05 23:27:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:06,989 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 492 transitions. [2021-06-05 23:27:06,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:06,990 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 492 transitions. [2021-06-05 23:27:06,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 23:27:06,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:06,991 INFO L554 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:07,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 23:27:07,209 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:07,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:07,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1718376096, now seen corresponding path program 15 times [2021-06-05 23:27:07,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:07,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482855071] [2021-06-05 23:27:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:07,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:07,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482855071] [2021-06-05 23:27:07,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482855071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:07,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146911718] [2021-06-05 23:27:07,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:27:07,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 23:27:07,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 23:27:07,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:07,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146911718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:07,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:07,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 23:27:07,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499893120] [2021-06-05 23:27:07,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 23:27:07,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:07,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 23:27:07,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 23:27:07,960 INFO L87 Difference]: Start difference. First operand 149 states and 492 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 23:27:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:08,360 INFO L93 Difference]: Finished difference Result 197 states and 539 transitions. [2021-06-05 23:27:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 23:27:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 23:27:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:08,361 INFO L225 Difference]: With dead ends: 197 [2021-06-05 23:27:08,361 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 23:27:08,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 767.2ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 23:27:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 23:27:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 119. [2021-06-05 23:27:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 3.110169491525424) internal successors, (367), 118 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 23:27:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 367 transitions. [2021-06-05 23:27:08,365 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 367 transitions. Word has length 23 [2021-06-05 23:27:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:08,366 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 367 transitions. [2021-06-05 23:27:08,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 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 23:27:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 367 transitions. [2021-06-05 23:27:08,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 23:27:08,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:08,366 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:08,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 23:27:08,567 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1688884076, now seen corresponding path program 16 times [2021-06-05 23:27:08,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:08,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610663930] [2021-06-05 23:27:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:08,780 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 23:27:08,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:08,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610663930] [2021-06-05 23:27:08,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610663930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:08,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061531046] [2021-06-05 23:27:08,781 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 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 23:27:08,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 23:27:08,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 23:27:08,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:09,426 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 23:27:09,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061531046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:09,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:09,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-06-05 23:27:09,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286012179] [2021-06-05 23:27:09,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 23:27:09,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:09,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 23:27:09,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 23:27:09,427 INFO L87 Difference]: Start difference. First operand 119 states and 367 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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 23:27:09,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:09,943 INFO L93 Difference]: Finished difference Result 327 states and 811 transitions. [2021-06-05 23:27:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 23:27:09,943 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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 24 [2021-06-05 23:27:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:09,945 INFO L225 Difference]: With dead ends: 327 [2021-06-05 23:27:09,945 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 23:27:09,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 952.0ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 23:27:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 23:27:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 141. [2021-06-05 23:27:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.1285714285714286) internal successors, (438), 140 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 438 transitions. [2021-06-05 23:27:09,951 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 438 transitions. Word has length 24 [2021-06-05 23:27:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:09,951 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 438 transitions. [2021-06-05 23:27:09,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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 23:27:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 438 transitions. [2021-06-05 23:27:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 23:27:09,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 23:27:09,952 INFO L554 BasicCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 23:27:10,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 23:27:10,157 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 23:27:10,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 23:27:10,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1454689826, now seen corresponding path program 17 times [2021-06-05 23:27:10,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 23:27:10,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022468851] [2021-06-05 23:27:10,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 23:27:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 23:27:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:10,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 23:27:10,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022468851] [2021-06-05 23:27:10,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022468851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:10,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484820314] [2021-06-05 23:27:10,403 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 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 23:27:10,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 23:27:10,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 23:27:10,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 23:27:10,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 23:27:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 23:27:11,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484820314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 23:27:11,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 23:27:11,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-06-05 23:27:11,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692342546] [2021-06-05 23:27:11,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 23:27:11,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 23:27:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 23:27:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 23:27:11,046 INFO L87 Difference]: Start difference. First operand 141 states and 438 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 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 23:27:11,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 23:27:11,418 INFO L93 Difference]: Finished difference Result 137 states and 247 transitions. [2021-06-05 23:27:11,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 23:27:11,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 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 25 [2021-06-05 23:27:11,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 23:27:11,419 INFO L225 Difference]: With dead ends: 137 [2021-06-05 23:27:11,419 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 23:27:11,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 900.6ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 23:27:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 23:27:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 23:27:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 23:27:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 23:27:11,419 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-06-05 23:27:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 23:27:11,420 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 23:27:11,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 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 23:27:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 23:27:11,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 23:27:11,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 23:27:11,626 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 23:27:11,628 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 11:27:11 BasicIcfg [2021-06-05 23:27:11,628 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 23:27:11,628 INFO L168 Benchmark]: Toolchain (without parser) took 23486.75 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 337.9 MB in the beginning and 266.3 MB in the end (delta: 71.6 MB). Peak memory consumption was 144.9 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:11,628 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 358.6 MB. Free memory was 339.2 MB in the beginning and 339.1 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:27:11,629 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.63 ms. Allocated memory is still 358.6 MB. Free memory was 337.9 MB in the beginning and 336.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 23:27:11,629 INFO L168 Benchmark]: Boogie Preprocessor took 33.56 ms. Allocated memory is still 358.6 MB. Free memory was 336.4 MB in the beginning and 335.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:11,629 INFO L168 Benchmark]: RCFGBuilder took 521.24 ms. Allocated memory is still 358.6 MB. Free memory was 335.2 MB in the beginning and 332.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:11,629 INFO L168 Benchmark]: TraceAbstraction took 22897.22 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 332.8 MB in the beginning and 266.3 MB in the end (delta: 66.5 MB). Peak memory consumption was 140.7 MB. Max. memory is 16.0 GB. [2021-06-05 23:27:11,629 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 358.6 MB. Free memory was 339.2 MB in the beginning and 339.1 MB in the end (delta: 65.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.63 ms. Allocated memory is still 358.6 MB. Free memory was 337.9 MB in the beginning and 336.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 33.56 ms. Allocated memory is still 358.6 MB. Free memory was 336.4 MB in the beginning and 335.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 521.24 ms. Allocated memory is still 358.6 MB. Free memory was 335.2 MB in the beginning and 332.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 22897.22 ms. Allocated memory was 358.6 MB in the beginning and 432.0 MB in the end (delta: 73.4 MB). Free memory was 332.8 MB in the beginning and 266.3 MB in the end (delta: 66.5 MB). Peak memory consumption was 140.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 125]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 27 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22805.8ms, OverallIterations: 27, TraceHistogramMax: 7, EmptinessCheckTime: 26.2ms, AutomataDifference: 3940.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 602 SDtfs, 1000 SDslu, 4887 SDs, 0 SdLazy, 2311 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1386.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 650 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 10699.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=24, InterpolantAutomatonStates: 247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 158.7ms AutomataMinimizationTime, 27 MinimizatonAttempts, 829 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 179.7ms SsaConstructionTime, 605.9ms SatisfiabilityAnalysisTime, 12075.3ms InterpolantComputationTime, 904 NumberOfCodeBlocks, 904 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 854 ConstructedInterpolants, 23 QuantifiedInterpolants, 9864 SizeOfPredicates, 191 NumberOfNonLiveVariables, 1161 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 50 InterpolantComputations, 4 PerfectInterpolantSequences, 169/656 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...