/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:51:07,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:51:07,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:51:07,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 13:51:07,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 13:51:07,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 13:51:07,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 13:51:07,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 13:51:07,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 13:51:07,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 13:51:07,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 13:51:07,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-06-05 13:51:07,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 13:51:07,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 13:51:07,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 13:51:07,659 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-Separate.epf [2021-06-05 13:51:07,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:51:07,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:51:07,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:51:07,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:51:07,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:51:07,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:51:07,695 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:51:07,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:51:07,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:51:07,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:51:07,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:51:07,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:51:07,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:51:07,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:51:07,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:51:07,697 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:51:07,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:51:07,697 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:51:07,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:51:07,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:51:07,697 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:51:07,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:51:07,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:51:07,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:51:07,699 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:51:07,699 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:51:08,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:51:08,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:51:08,042 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:51:08,043 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:51:08,044 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:51:08,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2021-06-05 13:51:08,045 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2021-06-05 13:51:08,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:51:08,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:51:08,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:51:08,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:51:08,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:51:08,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:51:08,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:51:08,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:51:08,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:51:08,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,132 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,133 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/1) ... [2021-06-05 13:51:08,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:51:08,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:51:08,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:51:08,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:51:08,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (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 13:51:08,221 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 13:51:08,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 13:51:08,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 13:51:08,222 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 13:51:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 13:51:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 13:51:08,222 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:51:08,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:51:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:51:08,223 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 13:51:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 13:51:08,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 13:51:08,223 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 13:51:08,442 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:51:08,442 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 13:51:08,443 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:51:08 BoogieIcfgContainer [2021-06-05 13:51:08,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:51:08,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:51:08,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:51:08,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:51:08,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:51:08" (1/2) ... [2021-06-05 13:51:08,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c44e356 and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:51:08, skipping insertion in model container [2021-06-05 13:51:08,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:51:08" (2/2) ... [2021-06-05 13:51:08,450 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2021-06-05 13:51:08,470 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:51:08,470 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:51:08,470 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:51:08,471 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:51:08,513 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 13:51:08,530 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:51:08,555 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:51:08,555 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:51:08,555 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:51:08,555 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:51:08,555 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:51:08,555 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:51:08,555 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:51:08,555 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:51:08,563 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 13:51:08,582 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:08,585 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 13:51:08,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:08,594 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:08,595 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:08,600 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-06-05 13:51:08,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:08,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454699994] [2021-06-05 13:51:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:08,841 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 13:51:08,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:08,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454699994] [2021-06-05 13:51:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454699994] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:51:08,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:51:08,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:51:08,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499337551] [2021-06-05 13:51:08,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:51:08,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:08,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:51:08,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:51:08,868 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:08,913 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 13:51:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:51:08,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 13:51:08,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:08,927 INFO L225 Difference]: With dead ends: 214 [2021-06-05 13:51:08,928 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 13:51:08,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:51:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 13:51:08,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 13:51:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 13:51:09,000 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 13:51:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,001 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 13:51:09,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 13:51:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:51:09,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,003 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:09,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:51:09,003 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:09,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-06-05 13:51:09,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:09,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550601891] [2021-06-05 13:51:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:09,060 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 13:51:09,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:09,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550601891] [2021-06-05 13:51:09,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550601891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:09,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029984443] [2021-06-05 13:51:09,061 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 13:51:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:09,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:51:09,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:09,185 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 13:51:09,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029984443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:09,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:09,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 13:51:09,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177394675] [2021-06-05 13:51:09,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:51:09,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:51:09,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:51:09,188 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:09,253 INFO L93 Difference]: Finished difference Result 344 states and 959 transitions. [2021-06-05 13:51:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:09,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have 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 13:51:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:09,257 INFO L225 Difference]: With dead ends: 344 [2021-06-05 13:51:09,257 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 13:51:09,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:51:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 13:51:09,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2021-06-05 13:51:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.953216374269006) internal successors, (505), 171 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 505 transitions. [2021-06-05 13:51:09,271 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 505 transitions. Word has length 17 [2021-06-05 13:51:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,272 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 505 transitions. [2021-06-05 13:51:09,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,272 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 505 transitions. [2021-06-05 13:51:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:51:09,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,274 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:09,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 13:51:09,478 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:09,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:09,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-06-05 13:51:09,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:09,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551764352] [2021-06-05 13:51:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:09,512 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 13:51:09,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551764352] [2021-06-05 13:51:09,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551764352] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:51:09,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:51:09,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:51:09,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22179062] [2021-06-05 13:51:09,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:51:09,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:09,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:51:09,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:51:09,514 INFO L87 Difference]: Start difference. First operand 172 states and 505 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:09,576 INFO L93 Difference]: Finished difference Result 237 states and 639 transitions. [2021-06-05 13:51:09,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:51:09,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:51:09,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:09,582 INFO L225 Difference]: With dead ends: 237 [2021-06-05 13:51:09,582 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 13:51:09,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:51:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 13:51:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2021-06-05 13:51:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.843243243243243) internal successors, (526), 185 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 526 transitions. [2021-06-05 13:51:09,596 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 526 transitions. Word has length 17 [2021-06-05 13:51:09,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,596 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 526 transitions. [2021-06-05 13:51:09,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,597 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 526 transitions. [2021-06-05 13:51:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:51:09,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,602 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:09,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:51:09,602 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:09,603 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-06-05 13:51:09,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:09,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106973368] [2021-06-05 13:51:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:09,681 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 13:51:09,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:09,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106973368] [2021-06-05 13:51:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106973368] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:51:09,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:51:09,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:51:09,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449710415] [2021-06-05 13:51:09,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:51:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:09,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:51:09,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:51:09,687 INFO L87 Difference]: Start difference. First operand 186 states and 526 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:09,759 INFO L93 Difference]: Finished difference Result 241 states and 641 transitions. [2021-06-05 13:51:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:09,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:51:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:09,761 INFO L225 Difference]: With dead ends: 241 [2021-06-05 13:51:09,761 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 13:51:09,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:51:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 13:51:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2021-06-05 13:51:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8272251308900525) internal successors, (540), 191 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 540 transitions. [2021-06-05 13:51:09,783 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 540 transitions. Word has length 17 [2021-06-05 13:51:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,783 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 540 transitions. [2021-06-05 13:51:09,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 540 transitions. [2021-06-05 13:51:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:51:09,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,784 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:09,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:51:09,784 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:09,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:09,785 INFO L82 PathProgramCache]: Analyzing trace with hash -189703520, now seen corresponding path program 2 times [2021-06-05 13:51:09,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:09,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684980441] [2021-06-05 13:51:09,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:09,816 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 13:51:09,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:09,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684980441] [2021-06-05 13:51:09,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684980441] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:51:09,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:51:09,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:51:09,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155478346] [2021-06-05 13:51:09,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:51:09,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:51:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:51:09,818 INFO L87 Difference]: Start difference. First operand 192 states and 540 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:09,846 INFO L93 Difference]: Finished difference Result 214 states and 609 transitions. [2021-06-05 13:51:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:51:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:51:09,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:09,848 INFO L225 Difference]: With dead ends: 214 [2021-06-05 13:51:09,848 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 13:51:09,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:51:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 13:51:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-06-05 13:51:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-06-05 13:51:09,857 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-06-05 13:51:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,857 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-06-05 13:51:09,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-06-05 13:51:09,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:51:09,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,858 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:09,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:51:09,859 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:09,859 INFO L82 PathProgramCache]: Analyzing trace with hash -142653028, now seen corresponding path program 3 times [2021-06-05 13:51:09,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:09,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436698217] [2021-06-05 13:51:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:09,899 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 13:51:09,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:09,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436698217] [2021-06-05 13:51:09,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436698217] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:51:09,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:51:09,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:51:09,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884423599] [2021-06-05 13:51:09,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:51:09,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:51:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:51:09,902 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:09,941 INFO L93 Difference]: Finished difference Result 254 states and 707 transitions. [2021-06-05 13:51:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:51:09,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:51:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:09,946 INFO L225 Difference]: With dead ends: 254 [2021-06-05 13:51:09,946 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 13:51:09,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:51:09,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 13:51:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-06-05 13:51:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.894230769230769) internal successors, (602), 208 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 602 transitions. [2021-06-05 13:51:09,956 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 602 transitions. Word has length 17 [2021-06-05 13:51:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:09,956 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 602 transitions. [2021-06-05 13:51:09,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:09,956 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 602 transitions. [2021-06-05 13:51:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:51:09,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:09,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:09,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:51:09,957 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:09,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:09,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 2 times [2021-06-05 13:51:09,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:09,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418153484] [2021-06-05 13:51:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,011 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 13:51:10,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:10,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418153484] [2021-06-05 13:51:10,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418153484] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:51:10,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:51:10,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:51:10,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607112346] [2021-06-05 13:51:10,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 13:51:10,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:10,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 13:51:10,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:51:10,014 INFO L87 Difference]: Start difference. First operand 209 states and 602 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:10,042 INFO L93 Difference]: Finished difference Result 245 states and 714 transitions. [2021-06-05 13:51:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 13:51:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:51:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:10,044 INFO L225 Difference]: With dead ends: 245 [2021-06-05 13:51:10,044 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 13:51:10,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 13:51:10,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 13:51:10,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2021-06-05 13:51:10,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9624413145539905) internal successors, (631), 213 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:10,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 631 transitions. [2021-06-05 13:51:10,054 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 631 transitions. Word has length 17 [2021-06-05 13:51:10,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:10,054 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 631 transitions. [2021-06-05 13:51:10,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 631 transitions. [2021-06-05 13:51:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:51:10,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:10,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:10,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:51:10,056 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:10,056 INFO L82 PathProgramCache]: Analyzing trace with hash -768893542, now seen corresponding path program 3 times [2021-06-05 13:51:10,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:10,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602225001] [2021-06-05 13:51:10,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,116 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 13:51:10,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:10,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602225001] [2021-06-05 13:51:10,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602225001] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:51:10,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:51:10,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:51:10,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094717082] [2021-06-05 13:51:10,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:51:10,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:10,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:51:10,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:51:10,125 INFO L87 Difference]: Start difference. First operand 214 states and 631 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:10,179 INFO L93 Difference]: Finished difference Result 237 states and 678 transitions. [2021-06-05 13:51:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:51:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 13:51:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:10,183 INFO L225 Difference]: With dead ends: 237 [2021-06-05 13:51:10,183 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 13:51:10,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:51:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 13:51:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 193. [2021-06-05 13:51:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9583333333333335) internal successors, (568), 192 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:10,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 568 transitions. [2021-06-05 13:51:10,195 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 568 transitions. Word has length 17 [2021-06-05 13:51:10,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:10,195 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 568 transitions. [2021-06-05 13:51:10,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:10,195 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 568 transitions. [2021-06-05 13:51:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 13:51:10,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:10,196 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:10,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:51:10,197 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1586125762, now seen corresponding path program 1 times [2021-06-05 13:51:10,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:10,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173443534] [2021-06-05 13:51:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:10,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:10,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173443534] [2021-06-05 13:51:10,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173443534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175400550] [2021-06-05 13:51:10,289 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 13:51:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 13:51:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:10,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:10,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175400550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:10,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 13:51:10,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035839004] [2021-06-05 13:51:10,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:51:10,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:10,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:51:10,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:51:10,380 INFO L87 Difference]: Start difference. First operand 193 states and 568 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 13:51:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:10,447 INFO L93 Difference]: Finished difference Result 254 states and 739 transitions. [2021-06-05 13:51:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:51:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 19 [2021-06-05 13:51:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:10,455 INFO L225 Difference]: With dead ends: 254 [2021-06-05 13:51:10,455 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 13:51:10,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:10,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 13:51:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 190. [2021-06-05 13:51:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2021-06-05 13:51:10,465 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2021-06-05 13:51:10,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:10,465 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2021-06-05 13:51:10,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 13:51:10,465 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2021-06-05 13:51:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:51:10,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:10,466 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:10,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:10,681 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-06-05 13:51:10,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:10,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881186489] [2021-06-05 13:51:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:10,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881186489] [2021-06-05 13:51:10,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881186489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18912222] [2021-06-05 13:51:10,761 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 13:51:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:51:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:10,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18912222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:10,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:10,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:10,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953996449] [2021-06-05 13:51:10,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:10,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:10,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:10,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:10,977 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:11,135 INFO L93 Difference]: Finished difference Result 342 states and 999 transitions. [2021-06-05 13:51:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:11,136 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:51:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:11,138 INFO L225 Difference]: With dead ends: 342 [2021-06-05 13:51:11,138 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 13:51:11,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:51:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 13:51:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 245. [2021-06-05 13:51:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9836065573770494) internal successors, (728), 244 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 728 transitions. [2021-06-05 13:51:11,146 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 728 transitions. Word has length 21 [2021-06-05 13:51:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:11,146 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 728 transitions. [2021-06-05 13:51:11,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 728 transitions. [2021-06-05 13:51:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:51:11,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:11,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:11,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 13:51:11,369 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1334485332, now seen corresponding path program 2 times [2021-06-05 13:51:11,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:11,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828158328] [2021-06-05 13:51:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:11,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:11,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:11,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828158328] [2021-06-05 13:51:11,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828158328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:11,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833065988] [2021-06-05 13:51:11,475 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 13:51:11,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:11,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:11,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:51:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:11,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833065988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:11,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:11,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:11,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716785449] [2021-06-05 13:51:11,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:11,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:11,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:11,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:11,644 INFO L87 Difference]: Start difference. First operand 245 states and 728 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 13:51:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:11,744 INFO L93 Difference]: Finished difference Result 394 states and 1167 transitions. [2021-06-05 13:51:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:11,744 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:51:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:11,746 INFO L225 Difference]: With dead ends: 394 [2021-06-05 13:51:11,746 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 13:51:11,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 13:51:11,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 280. [2021-06-05 13:51:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.978494623655914) internal successors, (831), 279 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 831 transitions. [2021-06-05 13:51:11,756 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 831 transitions. Word has length 21 [2021-06-05 13:51:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:11,756 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 831 transitions. [2021-06-05 13:51:11,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 13:51:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 831 transitions. [2021-06-05 13:51:11,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:51:11,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:11,757 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:11,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:11,981 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:11,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1241595234, now seen corresponding path program 3 times [2021-06-05 13:51:11,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:11,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219108165] [2021-06-05 13:51:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:12,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:12,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219108165] [2021-06-05 13:51:12,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219108165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:12,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451935820] [2021-06-05 13:51:12,059 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 13:51:12,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:51:12,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:51:12,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:12,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451935820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:12,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:12,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:12,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139559464] [2021-06-05 13:51:12,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:12,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:12,170 INFO L87 Difference]: Start difference. First operand 280 states and 831 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:12,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:12,245 INFO L93 Difference]: Finished difference Result 413 states and 1224 transitions. [2021-06-05 13:51:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:51:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:12,248 INFO L225 Difference]: With dead ends: 413 [2021-06-05 13:51:12,248 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 13:51:12,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 13:51:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 292. [2021-06-05 13:51:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.979381443298969) internal successors, (867), 291 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:12,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 867 transitions. [2021-06-05 13:51:12,257 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 867 transitions. Word has length 21 [2021-06-05 13:51:12,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:12,257 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 867 transitions. [2021-06-05 13:51:12,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 867 transitions. [2021-06-05 13:51:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:51:12,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:12,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:12,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 13:51:12,481 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 204187218, now seen corresponding path program 4 times [2021-06-05 13:51:12,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:12,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460660261] [2021-06-05 13:51:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:12,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:12,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460660261] [2021-06-05 13:51:12,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460660261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:12,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12748282] [2021-06-05 13:51:12,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:12,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:12,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:12,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:51:12,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:12,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12748282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:12,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:12,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:12,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963488538] [2021-06-05 13:51:12,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:12,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:12,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:12,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:12,666 INFO L87 Difference]: Start difference. First operand 292 states and 867 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 13:51:12,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:12,772 INFO L93 Difference]: Finished difference Result 421 states and 1248 transitions. [2021-06-05 13:51:12,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:12,772 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:51:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:12,775 INFO L225 Difference]: With dead ends: 421 [2021-06-05 13:51:12,775 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 13:51:12,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 13:51:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 316. [2021-06-05 13:51:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:12,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-06-05 13:51:12,785 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 21 [2021-06-05 13:51:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:12,786 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-06-05 13:51:12,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 13:51:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-06-05 13:51:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:51:12,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:12,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:13,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:13,007 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1380051106, now seen corresponding path program 5 times [2021-06-05 13:51:13,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:13,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651299813] [2021-06-05 13:51:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:13,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:13,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651299813] [2021-06-05 13:51:13,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651299813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047470809] [2021-06-05 13:51:13,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:13,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:13,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:51:13,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:13,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047470809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:13,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:13,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119903251] [2021-06-05 13:51:13,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:13,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:13,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:13,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:13,232 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 13:51:13,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:13,330 INFO L93 Difference]: Finished difference Result 491 states and 1452 transitions. [2021-06-05 13:51:13,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:13,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:51:13,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:13,333 INFO L225 Difference]: With dead ends: 491 [2021-06-05 13:51:13,334 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 13:51:13,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:13,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 13:51:13,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 341. [2021-06-05 13:51:13,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-06-05 13:51:13,346 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-06-05 13:51:13,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:13,347 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-06-05 13:51:13,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 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 13:51:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-06-05 13:51:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:51:13,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:13,348 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:13,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 13:51:13,574 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:13,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1758862818, now seen corresponding path program 6 times [2021-06-05 13:51:13,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:13,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822497485] [2021-06-05 13:51:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:13,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:13,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822497485] [2021-06-05 13:51:13,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822497485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878408026] [2021-06-05 13:51:13,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:13,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 13:51:13,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:13,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 13:51:13,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:13,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878408026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:13,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:13,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:13,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805733884] [2021-06-05 13:51:13,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:13,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:13,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:13,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:13,772 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 13:51:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:13,880 INFO L93 Difference]: Finished difference Result 473 states and 1400 transitions. [2021-06-05 13:51:13,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:51:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 21 [2021-06-05 13:51:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:13,883 INFO L225 Difference]: With dead ends: 473 [2021-06-05 13:51:13,883 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 13:51:13,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:13,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 13:51:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 341. [2021-06-05 13:51:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-06-05 13:51:13,893 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-06-05 13:51:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:13,893 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-06-05 13:51:13,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 13:51:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-06-05 13:51:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:13,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:13,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:14,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 13:51:14,113 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:14,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:14,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1287155254, now seen corresponding path program 7 times [2021-06-05 13:51:14,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:14,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674078018] [2021-06-05 13:51:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:14,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:14,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674078018] [2021-06-05 13:51:14,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674078018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735589573] [2021-06-05 13:51:14,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:51:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:14,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:14,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735589573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:14,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:14,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107827650] [2021-06-05 13:51:14,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:14,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:14,292 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:14,459 INFO L93 Difference]: Finished difference Result 749 states and 2150 transitions. [2021-06-05 13:51:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:14,464 INFO L225 Difference]: With dead ends: 749 [2021-06-05 13:51:14,464 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 13:51:14,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 13:51:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 430. [2021-06-05 13:51:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-06-05 13:51:14,479 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 23 [2021-06-05 13:51:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:14,480 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-06-05 13:51:14,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-06-05 13:51:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:14,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:14,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:14,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 13:51:14,697 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:14,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1821721226, now seen corresponding path program 8 times [2021-06-05 13:51:14,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:14,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852124663] [2021-06-05 13:51:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:14,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852124663] [2021-06-05 13:51:14,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852124663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322848517] [2021-06-05 13:51:14,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:51:14,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:14,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:14,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:14,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:14,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322848517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:14,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:14,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 13:51:14,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192042905] [2021-06-05 13:51:14,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:14,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:14,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:14,842 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 13:51:14,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:14,970 INFO L93 Difference]: Finished difference Result 758 states and 2270 transitions. [2021-06-05 13:51:14,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:14,971 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 23 [2021-06-05 13:51:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:14,975 INFO L225 Difference]: With dead ends: 758 [2021-06-05 13:51:14,975 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 13:51:14,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:51:14,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 13:51:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 583. [2021-06-05 13:51:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1597938144329896) internal successors, (1839), 582 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1839 transitions. [2021-06-05 13:51:14,993 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1839 transitions. Word has length 23 [2021-06-05 13:51:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:14,993 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1839 transitions. [2021-06-05 13:51:14,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 13:51:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1839 transitions. [2021-06-05 13:51:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:14,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:14,995 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:15,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 13:51:15,219 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -63390266, now seen corresponding path program 9 times [2021-06-05 13:51:15,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:15,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79146116] [2021-06-05 13:51:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:15,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:15,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79146116] [2021-06-05 13:51:15,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79146116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374691646] [2021-06-05 13:51:15,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:15,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:51:15,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:15,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:15,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374691646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:15,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:51:15,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015064318] [2021-06-05 13:51:15,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:51:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:51:15,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:51:15,346 INFO L87 Difference]: Start difference. First operand 583 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 13:51:15,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:15,432 INFO L93 Difference]: Finished difference Result 1311 states and 4123 transitions. [2021-06-05 13:51:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:51:15,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 23 [2021-06-05 13:51:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:15,438 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 13:51:15,438 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 13:51:15,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 13:51:15,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 821. [2021-06-05 13:51:15,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.34390243902439) internal successors, (2742), 820 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2742 transitions. [2021-06-05 13:51:15,463 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2742 transitions. Word has length 23 [2021-06-05 13:51:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:15,463 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2742 transitions. [2021-06-05 13:51:15,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 13:51:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2742 transitions. [2021-06-05 13:51:15,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:15,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:15,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:15,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 13:51:15,681 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:15,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:15,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1548958394, now seen corresponding path program 10 times [2021-06-05 13:51:15,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:15,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547150261] [2021-06-05 13:51:15,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:15,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:15,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547150261] [2021-06-05 13:51:15,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547150261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172376410] [2021-06-05 13:51:15,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:51:15,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:15,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:15,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:15,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:15,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172376410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:15,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:15,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 13:51:15,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233913571] [2021-06-05 13:51:15,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:51:15,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:51:15,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:51:15,827 INFO L87 Difference]: Start difference. First operand 821 states and 2742 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:15,929 INFO L93 Difference]: Finished difference Result 1047 states and 3326 transitions. [2021-06-05 13:51:15,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:15,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:15,937 INFO L225 Difference]: With dead ends: 1047 [2021-06-05 13:51:15,937 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 13:51:15,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 13:51:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 829. [2021-06-05 13:51:15,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.321256038647343) internal successors, (2750), 828 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2750 transitions. [2021-06-05 13:51:15,963 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2750 transitions. Word has length 23 [2021-06-05 13:51:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:15,963 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2750 transitions. [2021-06-05 13:51:15,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2750 transitions. [2021-06-05 13:51:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:15,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:15,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:16,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:16,181 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1102347518, now seen corresponding path program 11 times [2021-06-05 13:51:16,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:16,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659807401] [2021-06-05 13:51:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:16,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659807401] [2021-06-05 13:51:16,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659807401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029085987] [2021-06-05 13:51:16,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:16,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:51:16,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:16,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:16,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:16,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029085987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:16,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:16,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 13:51:16,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117273851] [2021-06-05 13:51:16,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:51:16,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:16,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:51:16,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:51:16,296 INFO L87 Difference]: Start difference. First operand 829 states and 2750 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:16,400 INFO L93 Difference]: Finished difference Result 1062 states and 3341 transitions. [2021-06-05 13:51:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:51:16,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:16,406 INFO L225 Difference]: With dead ends: 1062 [2021-06-05 13:51:16,406 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 13:51:16,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 13:51:16,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 852. [2021-06-05 13:51:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.2925969447708576) internal successors, (2802), 851 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2802 transitions. [2021-06-05 13:51:16,433 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2802 transitions. Word has length 23 [2021-06-05 13:51:16,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:16,433 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2802 transitions. [2021-06-05 13:51:16,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:16,433 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2802 transitions. [2021-06-05 13:51:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:16,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:16,436 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:16,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 13:51:16,649 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:16,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:16,649 INFO L82 PathProgramCache]: Analyzing trace with hash 50200326, now seen corresponding path program 12 times [2021-06-05 13:51:16,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:16,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872638277] [2021-06-05 13:51:16,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:16,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:16,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872638277] [2021-06-05 13:51:16,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872638277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:16,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153020783] [2021-06-05 13:51:16,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:16,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:51:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:16,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:16,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:16,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153020783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:16,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:16,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:51:16,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831449517] [2021-06-05 13:51:16,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:16,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:16,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:16,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:16,795 INFO L87 Difference]: Start difference. First operand 852 states and 2802 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:51:17,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:17,214 INFO L93 Difference]: Finished difference Result 2185 states and 6702 transitions. [2021-06-05 13:51:17,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 13:51:17,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:17,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:17,225 INFO L225 Difference]: With dead ends: 2185 [2021-06-05 13:51:17,225 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 13:51:17,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:51:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 13:51:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 941. [2021-06-05 13:51:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.331914893617021) internal successors, (3132), 940 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3132 transitions. [2021-06-05 13:51:17,263 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3132 transitions. Word has length 23 [2021-06-05 13:51:17,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:17,263 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3132 transitions. [2021-06-05 13:51:17,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:51:17,264 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3132 transitions. [2021-06-05 13:51:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:17,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:17,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:17,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:17,481 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash -32096124, now seen corresponding path program 13 times [2021-06-05 13:51:17,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:17,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137448908] [2021-06-05 13:51:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:17,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:17,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137448908] [2021-06-05 13:51:17,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137448908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:17,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896444772] [2021-06-05 13:51:17,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:17,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:17,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896444772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:17,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:17,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 13:51:17,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031157906] [2021-06-05 13:51:17,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:51:17,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:17,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:51:17,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:51:17,594 INFO L87 Difference]: Start difference. First operand 941 states and 3132 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:17,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:17,682 INFO L93 Difference]: Finished difference Result 1660 states and 5311 transitions. [2021-06-05 13:51:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:17,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:17,691 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 13:51:17,691 INFO L226 Difference]: Without dead ends: 1660 [2021-06-05 13:51:17,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-06-05 13:51:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1146. [2021-06-05 13:51:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.4) internal successors, (3893), 1145 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3893 transitions. [2021-06-05 13:51:17,727 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3893 transitions. Word has length 23 [2021-06-05 13:51:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:17,727 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3893 transitions. [2021-06-05 13:51:17,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:17,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3893 transitions. [2021-06-05 13:51:17,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:17,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:17,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:17,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 13:51:17,954 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1539696380, now seen corresponding path program 14 times [2021-06-05 13:51:17,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:17,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85936279] [2021-06-05 13:51:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:17,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:17,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85936279] [2021-06-05 13:51:17,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85936279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:17,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076653358] [2021-06-05 13:51:17,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:18,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:18,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:18,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076653358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:18,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:18,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:51:18,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530209401] [2021-06-05 13:51:18,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:51:18,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:18,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:51:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:18,071 INFO L87 Difference]: Start difference. First operand 1146 states and 3893 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:18,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:18,471 INFO L93 Difference]: Finished difference Result 2541 states and 8351 transitions. [2021-06-05 13:51:18,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:51:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:18,485 INFO L225 Difference]: With dead ends: 2541 [2021-06-05 13:51:18,486 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 13:51:18,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-06-05 13:51:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 13:51:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1684. [2021-06-05 13:51:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.474747474747475) internal successors, (5848), 1683 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5848 transitions. [2021-06-05 13:51:18,536 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5848 transitions. Word has length 23 [2021-06-05 13:51:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:18,536 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5848 transitions. [2021-06-05 13:51:18,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5848 transitions. [2021-06-05 13:51:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:18,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:18,541 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:18,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:18,765 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:18,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2142929212, now seen corresponding path program 15 times [2021-06-05 13:51:18,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:18,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375539706] [2021-06-05 13:51:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:18,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:18,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375539706] [2021-06-05 13:51:18,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375539706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:18,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006592738] [2021-06-05 13:51:18,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:18,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:51:18,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:18,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:18,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006592738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:18,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:18,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 13:51:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289029992] [2021-06-05 13:51:18,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 13:51:18,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 13:51:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:51:18,933 INFO L87 Difference]: Start difference. First operand 1684 states and 5848 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:19,302 INFO L93 Difference]: Finished difference Result 4179 states and 14030 transitions. [2021-06-05 13:51:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 13:51:19,309 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:19,324 INFO L225 Difference]: With dead ends: 4179 [2021-06-05 13:51:19,324 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 13:51:19,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:51:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 13:51:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2798. [2021-06-05 13:51:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.5723989989274223) internal successors, (9992), 2797 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9992 transitions. [2021-06-05 13:51:19,400 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9992 transitions. Word has length 23 [2021-06-05 13:51:19,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:19,400 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 9992 transitions. [2021-06-05 13:51:19,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9992 transitions. [2021-06-05 13:51:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:19,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:19,407 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:19,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 13:51:19,630 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:19,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2023712944, now seen corresponding path program 16 times [2021-06-05 13:51:19,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:19,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750746500] [2021-06-05 13:51:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:19,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750746500] [2021-06-05 13:51:19,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750746500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:19,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101268588] [2021-06-05 13:51:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:51:19,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:19,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:19,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:19,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101268588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:19,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:19,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 13:51:19,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170706025] [2021-06-05 13:51:19,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:19,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:19,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:19,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:19,754 INFO L87 Difference]: Start difference. First operand 2798 states and 9992 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 13:51:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:19,885 INFO L93 Difference]: Finished difference Result 3396 states and 11614 transitions. [2021-06-05 13:51:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 23 [2021-06-05 13:51:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:19,892 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 13:51:19,892 INFO L226 Difference]: Without dead ends: 3345 [2021-06-05 13:51:19,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:51:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-06-05 13:51:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2812. [2021-06-05 13:51:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 3.55923159018143) internal successors, (10005), 2811 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 10005 transitions. [2021-06-05 13:51:19,964 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 10005 transitions. Word has length 23 [2021-06-05 13:51:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:19,965 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 10005 transitions. [2021-06-05 13:51:19,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 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 13:51:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 10005 transitions. [2021-06-05 13:51:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:19,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:19,972 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:20,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 13:51:20,189 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:20,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:20,189 INFO L82 PathProgramCache]: Analyzing trace with hash 783282608, now seen corresponding path program 17 times [2021-06-05 13:51:20,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:20,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572336912] [2021-06-05 13:51:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:20,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572336912] [2021-06-05 13:51:20,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572336912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832563742] [2021-06-05 13:51:20,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:20,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:20,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:20,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:20,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:20,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832563742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:20,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 13:51:20,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035551825] [2021-06-05 13:51:20,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 13:51:20,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:20,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 13:51:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 13:51:20,332 INFO L87 Difference]: Start difference. First operand 2812 states and 10005 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:20,415 INFO L93 Difference]: Finished difference Result 4023 states and 13889 transitions. [2021-06-05 13:51:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 13:51:20,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:20,424 INFO L225 Difference]: With dead ends: 4023 [2021-06-05 13:51:20,424 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 13:51:20,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:51:20,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 13:51:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3260. [2021-06-05 13:51:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 3.59159251304081) internal successors, (11705), 3259 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 11705 transitions. [2021-06-05 13:51:20,504 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 11705 transitions. Word has length 23 [2021-06-05 13:51:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:20,504 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 11705 transitions. [2021-06-05 13:51:20,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 11705 transitions. [2021-06-05 13:51:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:20,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:20,512 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:20,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 13:51:20,729 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:20,729 INFO L82 PathProgramCache]: Analyzing trace with hash 530496180, now seen corresponding path program 18 times [2021-06-05 13:51:20,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:20,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301380217] [2021-06-05 13:51:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:20,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:20,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301380217] [2021-06-05 13:51:20,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301380217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148817817] [2021-06-05 13:51:20,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:20,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:51:20,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:20,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:51:20,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148817817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:20,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:20,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:51:20,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230302814] [2021-06-05 13:51:20,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:20,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:20,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:20,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:20,825 INFO L87 Difference]: Start difference. First operand 3260 states and 11705 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:51:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:21,250 INFO L93 Difference]: Finished difference Result 8888 states and 30108 transitions. [2021-06-05 13:51:21,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 13:51:21,251 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:21,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:21,274 INFO L225 Difference]: With dead ends: 8888 [2021-06-05 13:51:21,275 INFO L226 Difference]: Without dead ends: 8754 [2021-06-05 13:51:21,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 13:51:21,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2021-06-05 13:51:21,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 5409. [2021-06-05 13:51:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5408 states have (on average 3.689164201183432) internal successors, (19951), 5408 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:21,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 19951 transitions. [2021-06-05 13:51:21,492 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 19951 transitions. Word has length 23 [2021-06-05 13:51:21,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:21,492 INFO L482 AbstractCegarLoop]: Abstraction has 5409 states and 19951 transitions. [2021-06-05 13:51:21,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:51:21,493 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 19951 transitions. [2021-06-05 13:51:21,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:21,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:21,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:21,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 13:51:21,730 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash 254898436, now seen corresponding path program 19 times [2021-06-05 13:51:21,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:21,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347448088] [2021-06-05 13:51:21,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:21,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:21,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347448088] [2021-06-05 13:51:21,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347448088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:21,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951751828] [2021-06-05 13:51:21,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:21,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:21,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:21,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951751828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:21,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:21,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 13:51:21,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845542534] [2021-06-05 13:51:21,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:51:21,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:21,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:51:21,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:51:21,832 INFO L87 Difference]: Start difference. First operand 5409 states and 19951 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:21,929 INFO L93 Difference]: Finished difference Result 6626 states and 23548 transitions. [2021-06-05 13:51:21,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:51:21,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:21,945 INFO L225 Difference]: With dead ends: 6626 [2021-06-05 13:51:21,945 INFO L226 Difference]: Without dead ends: 6576 [2021-06-05 13:51:21,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:51:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-05 13:51:22,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 5617. [2021-06-05 13:51:22,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 3.6428062678062676) internal successors, (20458), 5616 states have internal predecessors, (20458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 20458 transitions. [2021-06-05 13:51:22,074 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 20458 transitions. Word has length 23 [2021-06-05 13:51:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:22,074 INFO L482 AbstractCegarLoop]: Abstraction has 5617 states and 20458 transitions. [2021-06-05 13:51:22,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 20458 transitions. [2021-06-05 13:51:22,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:22,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:22,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:22,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 13:51:22,311 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1159769024, now seen corresponding path program 20 times [2021-06-05 13:51:22,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:22,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582043394] [2021-06-05 13:51:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:22,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:22,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582043394] [2021-06-05 13:51:22,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582043394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:22,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157559072] [2021-06-05 13:51:22,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:22,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:22,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:22,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:22,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:51:22,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157559072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:22,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:22,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:51:22,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441668032] [2021-06-05 13:51:22,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:22,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:22,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:22,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:22,472 INFO L87 Difference]: Start difference. First operand 5617 states and 20458 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:22,907 INFO L93 Difference]: Finished difference Result 12332 states and 42412 transitions. [2021-06-05 13:51:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 13:51:22,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:22,930 INFO L225 Difference]: With dead ends: 12332 [2021-06-05 13:51:22,930 INFO L226 Difference]: Without dead ends: 12185 [2021-06-05 13:51:22,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 13:51:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2021-06-05 13:51:23,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 8357. [2021-06-05 13:51:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.7277405457156534) internal successors, (31149), 8356 states have internal predecessors, (31149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:23,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 31149 transitions. [2021-06-05 13:51:23,156 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 31149 transitions. Word has length 23 [2021-06-05 13:51:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:23,156 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 31149 transitions. [2021-06-05 13:51:23,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 31149 transitions. [2021-06-05 13:51:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 13:51:23,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:23,174 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:23,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:23,389 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:23,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:23,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1991076932, now seen corresponding path program 21 times [2021-06-05 13:51:23,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:23,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844855026] [2021-06-05 13:51:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:23,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:23,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844855026] [2021-06-05 13:51:23,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844855026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:23,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465361064] [2021-06-05 13:51:23,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:23,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 13:51:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:23,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 13:51:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:51:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465361064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:23,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:23,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 13:51:23,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537822042] [2021-06-05 13:51:23,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:51:23,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:23,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:51:23,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:51:23,535 INFO L87 Difference]: Start difference. First operand 8357 states and 31149 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:51:23,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:23,858 INFO L93 Difference]: Finished difference Result 11103 states and 39610 transitions. [2021-06-05 13:51:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 13:51:23,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 13:51:23,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:23,881 INFO L225 Difference]: With dead ends: 11103 [2021-06-05 13:51:23,881 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 13:51:23,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:51:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 13:51:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 8492. [2021-06-05 13:51:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.725120716052291) internal successors, (31630), 8491 states have internal predecessors, (31630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 31630 transitions. [2021-06-05 13:51:24,115 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 31630 transitions. Word has length 23 [2021-06-05 13:51:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:24,116 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 31630 transitions. [2021-06-05 13:51:24,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:51:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 31630 transitions. [2021-06-05 13:51:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:24,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:24,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:24,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:24,359 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash -553390134, now seen corresponding path program 22 times [2021-06-05 13:51:24,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:24,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92663939] [2021-06-05 13:51:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:24,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:24,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92663939] [2021-06-05 13:51:24,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92663939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:24,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672188590] [2021-06-05 13:51:24,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:24,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:24,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:24,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:24,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672188590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:24,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:24,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:24,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061996821] [2021-06-05 13:51:24,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:24,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:24,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:24,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:24,791 INFO L87 Difference]: Start difference. First operand 8492 states and 31630 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:25,169 INFO L93 Difference]: Finished difference Result 8694 states and 32230 transitions. [2021-06-05 13:51:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:25,170 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:25,186 INFO L225 Difference]: With dead ends: 8694 [2021-06-05 13:51:25,187 INFO L226 Difference]: Without dead ends: 8679 [2021-06-05 13:51:25,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-06-05 13:51:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 8558. [2021-06-05 13:51:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 3.722098866425149) internal successors, (31850), 8557 states have internal predecessors, (31850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 31850 transitions. [2021-06-05 13:51:25,339 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 31850 transitions. Word has length 27 [2021-06-05 13:51:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:25,339 INFO L482 AbstractCegarLoop]: Abstraction has 8558 states and 31850 transitions. [2021-06-05 13:51:25,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 31850 transitions. [2021-06-05 13:51:25,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:25,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:25,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:25,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:25,573 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:25,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:25,573 INFO L82 PathProgramCache]: Analyzing trace with hash -546769482, now seen corresponding path program 23 times [2021-06-05 13:51:25,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:25,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430075186] [2021-06-05 13:51:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:25,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430075186] [2021-06-05 13:51:25,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430075186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:25,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602044242] [2021-06-05 13:51:25,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:25,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:51:25,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:25,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:25,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602044242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:25,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:25,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606120321] [2021-06-05 13:51:25,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:25,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:25,958 INFO L87 Difference]: Start difference. First operand 8558 states and 31850 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:26,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:26,342 INFO L93 Difference]: Finished difference Result 8977 states and 33000 transitions. [2021-06-05 13:51:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:26,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:26,366 INFO L225 Difference]: With dead ends: 8977 [2021-06-05 13:51:26,367 INFO L226 Difference]: Without dead ends: 8896 [2021-06-05 13:51:26,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:51:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-06-05 13:51:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8629. [2021-06-05 13:51:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8628 states have (on average 3.7192860454334724) internal successors, (32090), 8628 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:26,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 32090 transitions. [2021-06-05 13:51:26,547 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 32090 transitions. Word has length 27 [2021-06-05 13:51:26,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:26,547 INFO L482 AbstractCegarLoop]: Abstraction has 8629 states and 32090 transitions. [2021-06-05 13:51:26,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:26,547 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 32090 transitions. [2021-06-05 13:51:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:26,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:26,567 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:26,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 13:51:26,790 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1765844602, now seen corresponding path program 24 times [2021-06-05 13:51:26,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:26,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950924721] [2021-06-05 13:51:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:26,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950924721] [2021-06-05 13:51:26,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950924721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:26,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62165031] [2021-06-05 13:51:26,881 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:26,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:51:26,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:26,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:27,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62165031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:27,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:27,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:27,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148317070] [2021-06-05 13:51:27,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:27,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:27,164 INFO L87 Difference]: Start difference. First operand 8629 states and 32090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:27,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:27,441 INFO L93 Difference]: Finished difference Result 9107 states and 33442 transitions. [2021-06-05 13:51:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:27,459 INFO L225 Difference]: With dead ends: 9107 [2021-06-05 13:51:27,459 INFO L226 Difference]: Without dead ends: 9029 [2021-06-05 13:51:27,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:51:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9029 states. [2021-06-05 13:51:27,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9029 to 8705. [2021-06-05 13:51:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8704 states have (on average 3.7188648897058822) internal successors, (32369), 8704 states have internal predecessors, (32369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 32369 transitions. [2021-06-05 13:51:27,620 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 32369 transitions. Word has length 27 [2021-06-05 13:51:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:27,620 INFO L482 AbstractCegarLoop]: Abstraction has 8705 states and 32369 transitions. [2021-06-05 13:51:27,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 32369 transitions. [2021-06-05 13:51:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:27,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:27,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:27,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:27,859 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:27,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1801149938, now seen corresponding path program 25 times [2021-06-05 13:51:27,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:27,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713884056] [2021-06-05 13:51:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:27,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:27,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713884056] [2021-06-05 13:51:27,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713884056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:27,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998947850] [2021-06-05 13:51:27,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:27,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:28,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998947850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:28,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:28,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:28,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153481645] [2021-06-05 13:51:28,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:28,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:28,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:28,225 INFO L87 Difference]: Start difference. First operand 8705 states and 32369 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:28,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:28,573 INFO L93 Difference]: Finished difference Result 9134 states and 33615 transitions. [2021-06-05 13:51:28,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:28,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:28,593 INFO L225 Difference]: With dead ends: 9134 [2021-06-05 13:51:28,593 INFO L226 Difference]: Without dead ends: 9104 [2021-06-05 13:51:28,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:51:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-06-05 13:51:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 8799. [2021-06-05 13:51:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8798 states have (on average 3.7176631052511935) internal successors, (32708), 8798 states have internal predecessors, (32708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 32708 transitions. [2021-06-05 13:51:28,764 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 32708 transitions. Word has length 27 [2021-06-05 13:51:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:28,764 INFO L482 AbstractCegarLoop]: Abstraction has 8799 states and 32708 transitions. [2021-06-05 13:51:28,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:28,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 32708 transitions. [2021-06-05 13:51:28,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:28,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:28,778 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:28,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 13:51:28,978 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:28,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:28,979 INFO L82 PathProgramCache]: Analyzing trace with hash -181203274, now seen corresponding path program 26 times [2021-06-05 13:51:28,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:28,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385541144] [2021-06-05 13:51:28,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:29,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:29,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385541144] [2021-06-05 13:51:29,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385541144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:29,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696391920] [2021-06-05 13:51:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:29,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:29,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:29,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696391920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:29,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:29,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:29,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925463523] [2021-06-05 13:51:29,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:29,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:29,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:29,248 INFO L87 Difference]: Start difference. First operand 8799 states and 32708 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:29,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:29,546 INFO L93 Difference]: Finished difference Result 9600 states and 35001 transitions. [2021-06-05 13:51:29,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:29,565 INFO L225 Difference]: With dead ends: 9600 [2021-06-05 13:51:29,565 INFO L226 Difference]: Without dead ends: 9541 [2021-06-05 13:51:29,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:51:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-06-05 13:51:29,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8909. [2021-06-05 13:51:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7182308037718905) internal successors, (33122), 8908 states have internal predecessors, (33122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33122 transitions. [2021-06-05 13:51:29,740 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33122 transitions. Word has length 27 [2021-06-05 13:51:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:29,740 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33122 transitions. [2021-06-05 13:51:29,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33122 transitions. [2021-06-05 13:51:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:29,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:29,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:29,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:29,954 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:29,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1438887350, now seen corresponding path program 27 times [2021-06-05 13:51:29,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:29,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368095412] [2021-06-05 13:51:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:30,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:30,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368095412] [2021-06-05 13:51:30,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368095412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:30,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030661804] [2021-06-05 13:51:30,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:30,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:51:30,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:30,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030661804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:30,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:30,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853537825] [2021-06-05 13:51:30,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:30,250 INFO L87 Difference]: Start difference. First operand 8909 states and 33122 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:30,563 INFO L93 Difference]: Finished difference Result 9517 states and 34885 transitions. [2021-06-05 13:51:30,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:30,578 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 13:51:30,578 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 13:51:30,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:51:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 13:51:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 9103. [2021-06-05 13:51:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9103 states, 9102 states have (on average 3.707426939134256) internal successors, (33745), 9102 states have internal predecessors, (33745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9103 states to 9103 states and 33745 transitions. [2021-06-05 13:51:30,700 INFO L78 Accepts]: Start accepts. Automaton has 9103 states and 33745 transitions. Word has length 27 [2021-06-05 13:51:30,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:30,700 INFO L482 AbstractCegarLoop]: Abstraction has 9103 states and 33745 transitions. [2021-06-05 13:51:30,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:30,701 INFO L276 IsEmpty]: Start isEmpty. Operand 9103 states and 33745 transitions. [2021-06-05 13:51:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:30,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:30,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:30,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 13:51:30,914 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:30,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1060302908, now seen corresponding path program 28 times [2021-06-05 13:51:30,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:30,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049499646] [2021-06-05 13:51:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:30,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049499646] [2021-06-05 13:51:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049499646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:30,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213829423] [2021-06-05 13:51:30,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:31,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:31,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:31,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213829423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:31,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:31,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:31,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315692462] [2021-06-05 13:51:31,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:31,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:31,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:31,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:31,197 INFO L87 Difference]: Start difference. First operand 9103 states and 33745 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:31,520 INFO L93 Difference]: Finished difference Result 9247 states and 34135 transitions. [2021-06-05 13:51:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:51:31,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:31,593 INFO L225 Difference]: With dead ends: 9247 [2021-06-05 13:51:31,593 INFO L226 Difference]: Without dead ends: 9219 [2021-06-05 13:51:31,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-06-05 13:51:31,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 9136. [2021-06-05 13:51:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 3.7056376573617955) internal successors, (33851), 9135 states have internal predecessors, (33851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 33851 transitions. [2021-06-05 13:51:31,782 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 33851 transitions. Word has length 27 [2021-06-05 13:51:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:31,782 INFO L482 AbstractCegarLoop]: Abstraction has 9136 states and 33851 transitions. [2021-06-05 13:51:31,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 33851 transitions. [2021-06-05 13:51:31,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:31,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:31,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:32,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:32,002 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:32,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:32,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1053682256, now seen corresponding path program 29 times [2021-06-05 13:51:32,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:32,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520247287] [2021-06-05 13:51:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:32,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:32,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520247287] [2021-06-05 13:51:32,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520247287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:32,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962015056] [2021-06-05 13:51:32,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:32,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:51:32,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:32,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:32,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:32,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962015056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:32,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:32,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:32,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217689368] [2021-06-05 13:51:32,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:32,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:32,269 INFO L87 Difference]: Start difference. First operand 9136 states and 33851 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:32,550 INFO L93 Difference]: Finished difference Result 9354 states and 34405 transitions. [2021-06-05 13:51:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:32,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:32,567 INFO L225 Difference]: With dead ends: 9354 [2021-06-05 13:51:32,567 INFO L226 Difference]: Without dead ends: 9280 [2021-06-05 13:51:32,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:51:32,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2021-06-05 13:51:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 9194. [2021-06-05 13:51:32,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.7022734689437615) internal successors, (34035), 9193 states have internal predecessors, (34035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 34035 transitions. [2021-06-05 13:51:32,715 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 34035 transitions. Word has length 27 [2021-06-05 13:51:32,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:32,715 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 34035 transitions. [2021-06-05 13:51:32,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 34035 transitions. [2021-06-05 13:51:32,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:32,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:32,731 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:32,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 13:51:32,939 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1258931828, now seen corresponding path program 30 times [2021-06-05 13:51:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:32,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915501550] [2021-06-05 13:51:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:33,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:33,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915501550] [2021-06-05 13:51:33,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915501550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:33,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843862244] [2021-06-05 13:51:33,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:33,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:51:33,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:33,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:33,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843862244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:33,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:33,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:33,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579970358] [2021-06-05 13:51:33,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:33,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:33,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:33,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:33,233 INFO L87 Difference]: Start difference. First operand 9194 states and 34035 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:33,506 INFO L93 Difference]: Finished difference Result 9533 states and 34982 transitions. [2021-06-05 13:51:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:33,507 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:33,524 INFO L225 Difference]: With dead ends: 9533 [2021-06-05 13:51:33,524 INFO L226 Difference]: Without dead ends: 9420 [2021-06-05 13:51:33,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:51:33,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-06-05 13:51:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9274. [2021-06-05 13:51:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.6988029763830474) internal successors, (34299), 9273 states have internal predecessors, (34299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 34299 transitions. [2021-06-05 13:51:33,658 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 34299 transitions. Word has length 27 [2021-06-05 13:51:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:33,658 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 34299 transitions. [2021-06-05 13:51:33,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:33,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 34299 transitions. [2021-06-05 13:51:33,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:33,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:33,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:33,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 13:51:33,899 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:33,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:33,899 INFO L82 PathProgramCache]: Analyzing trace with hash -17021312, now seen corresponding path program 31 times [2021-06-05 13:51:33,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:33,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869303195] [2021-06-05 13:51:33,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:33,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:33,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869303195] [2021-06-05 13:51:33,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869303195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:33,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370600886] [2021-06-05 13:51:33,979 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:34,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:34,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:34,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370600886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:34,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:34,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:34,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904124420] [2021-06-05 13:51:34,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:34,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:34,149 INFO L87 Difference]: Start difference. First operand 9274 states and 34299 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:34,434 INFO L93 Difference]: Finished difference Result 9439 states and 34788 transitions. [2021-06-05 13:51:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:51:34,435 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:34,452 INFO L225 Difference]: With dead ends: 9439 [2021-06-05 13:51:34,452 INFO L226 Difference]: Without dead ends: 9424 [2021-06-05 13:51:34,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:51:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-06-05 13:51:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 9304. [2021-06-05 13:51:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9304 states, 9303 states have (on average 3.6990218209179835) internal successors, (34412), 9303 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 34412 transitions. [2021-06-05 13:51:34,583 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 34412 transitions. Word has length 27 [2021-06-05 13:51:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:34,583 INFO L482 AbstractCegarLoop]: Abstraction has 9304 states and 34412 transitions. [2021-06-05 13:51:34,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 34412 transitions. [2021-06-05 13:51:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:34,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:34,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:34,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 13:51:34,796 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:34,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:34,797 INFO L82 PathProgramCache]: Analyzing trace with hash -533712016, now seen corresponding path program 32 times [2021-06-05 13:51:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:34,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513997310] [2021-06-05 13:51:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:34,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:34,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513997310] [2021-06-05 13:51:34,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513997310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:34,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574155272] [2021-06-05 13:51:34,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:34,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:34,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:34,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:34,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:35,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574155272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:35,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:35,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:35,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48079519] [2021-06-05 13:51:35,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:35,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:35,099 INFO L87 Difference]: Start difference. First operand 9304 states and 34412 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:35,470 INFO L93 Difference]: Finished difference Result 9649 states and 35346 transitions. [2021-06-05 13:51:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:35,489 INFO L225 Difference]: With dead ends: 9649 [2021-06-05 13:51:35,489 INFO L226 Difference]: Without dead ends: 9561 [2021-06-05 13:51:35,490 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:51:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9561 states. [2021-06-05 13:51:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 9395. [2021-06-05 13:51:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 3.6943793911007026) internal successors, (34705), 9394 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:35,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 34705 transitions. [2021-06-05 13:51:35,630 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 34705 transitions. Word has length 27 [2021-06-05 13:51:35,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:35,630 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 34705 transitions. [2021-06-05 13:51:35,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:35,630 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 34705 transitions. [2021-06-05 13:51:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:35,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:35,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:35,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 13:51:35,846 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash -339028684, now seen corresponding path program 33 times [2021-06-05 13:51:35,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:35,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181234452] [2021-06-05 13:51:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:35,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181234452] [2021-06-05 13:51:35,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181234452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:35,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303072736] [2021-06-05 13:51:35,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:35,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:51:35,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:35,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:36,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:36,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303072736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:36,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:36,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:36,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810598641] [2021-06-05 13:51:36,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:36,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:36,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:36,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:36,150 INFO L87 Difference]: Start difference. First operand 9395 states and 34705 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:36,448 INFO L93 Difference]: Finished difference Result 9931 states and 36232 transitions. [2021-06-05 13:51:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:36,468 INFO L225 Difference]: With dead ends: 9931 [2021-06-05 13:51:36,468 INFO L226 Difference]: Without dead ends: 9855 [2021-06-05 13:51:36,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:51:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-06-05 13:51:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9522. [2021-06-05 13:51:36,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 3.6922592164688584) internal successors, (35154), 9521 states have internal predecessors, (35154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:36,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 35154 transitions. [2021-06-05 13:51:36,616 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 35154 transitions. Word has length 27 [2021-06-05 13:51:36,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:36,617 INFO L482 AbstractCegarLoop]: Abstraction has 9522 states and 35154 transitions. [2021-06-05 13:51:36,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:36,617 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 35154 transitions. [2021-06-05 13:51:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:36,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:36,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:36,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:36,830 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:36,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:36,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1349589500, now seen corresponding path program 34 times [2021-06-05 13:51:36,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:36,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442129793] [2021-06-05 13:51:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:36,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:36,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442129793] [2021-06-05 13:51:36,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442129793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:36,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016915269] [2021-06-05 13:51:36,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:36,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:36,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:36,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:37,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:37,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016915269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:37,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:37,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:37,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763501374] [2021-06-05 13:51:37,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:37,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:37,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:37,161 INFO L87 Difference]: Start difference. First operand 9522 states and 35154 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:37,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:37,381 INFO L93 Difference]: Finished difference Result 9863 states and 36097 transitions. [2021-06-05 13:51:37,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:37,382 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:37,400 INFO L225 Difference]: With dead ends: 9863 [2021-06-05 13:51:37,400 INFO L226 Difference]: Without dead ends: 9764 [2021-06-05 13:51:37,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-06-05 13:51:37,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9594. [2021-06-05 13:51:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 3.6910247055144376) internal successors, (35408), 9593 states have internal predecessors, (35408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 35408 transitions. [2021-06-05 13:51:37,546 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 35408 transitions. Word has length 27 [2021-06-05 13:51:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:37,546 INFO L482 AbstractCegarLoop]: Abstraction has 9594 states and 35408 transitions. [2021-06-05 13:51:37,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 35408 transitions. [2021-06-05 13:51:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:37,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:37,560 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:37,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 13:51:37,761 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:37,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:37,761 INFO L82 PathProgramCache]: Analyzing trace with hash 193536128, now seen corresponding path program 35 times [2021-06-05 13:51:37,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:37,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671927987] [2021-06-05 13:51:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:37,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671927987] [2021-06-05 13:51:37,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671927987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:37,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101083307] [2021-06-05 13:51:37,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:37,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:51:37,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:37,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:38,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101083307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:38,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:38,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:38,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697126767] [2021-06-05 13:51:38,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:38,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:38,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:38,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:38,047 INFO L87 Difference]: Start difference. First operand 9594 states and 35408 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:38,306 INFO L93 Difference]: Finished difference Result 10085 states and 36794 transitions. [2021-06-05 13:51:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:38,324 INFO L225 Difference]: With dead ends: 10085 [2021-06-05 13:51:38,325 INFO L226 Difference]: Without dead ends: 10009 [2021-06-05 13:51:38,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-06-05 13:51:38,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9667. [2021-06-05 13:51:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9667 states, 9666 states have (on average 3.6887026691495963) internal successors, (35655), 9666 states have internal predecessors, (35655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9667 states to 9667 states and 35655 transitions. [2021-06-05 13:51:38,553 INFO L78 Accepts]: Start accepts. Automaton has 9667 states and 35655 transitions. Word has length 27 [2021-06-05 13:51:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:38,553 INFO L482 AbstractCegarLoop]: Abstraction has 9667 states and 35655 transitions. [2021-06-05 13:51:38,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 9667 states and 35655 transitions. [2021-06-05 13:51:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:38,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:38,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:38,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 13:51:38,769 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -143606020, now seen corresponding path program 36 times [2021-06-05 13:51:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:38,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730199214] [2021-06-05 13:51:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:38,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:38,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730199214] [2021-06-05 13:51:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730199214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:38,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625971206] [2021-06-05 13:51:38,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:38,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:51:38,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:38,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:39,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625971206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:39,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:39,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:39,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203769859] [2021-06-05 13:51:39,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:39,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:39,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:39,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:39,041 INFO L87 Difference]: Start difference. First operand 9667 states and 35655 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:39,286 INFO L93 Difference]: Finished difference Result 10306 states and 37504 transitions. [2021-06-05 13:51:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:51:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:39,313 INFO L225 Difference]: With dead ends: 10306 [2021-06-05 13:51:39,313 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 13:51:39,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:39,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 13:51:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9815. [2021-06-05 13:51:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.68830242510699) internal successors, (36197), 9814 states have internal predecessors, (36197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36197 transitions. [2021-06-05 13:51:39,549 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36197 transitions. Word has length 27 [2021-06-05 13:51:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:39,549 INFO L482 AbstractCegarLoop]: Abstraction has 9815 states and 36197 transitions. [2021-06-05 13:51:39,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36197 transitions. [2021-06-05 13:51:39,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:39,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:39,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:39,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:39,766 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:39,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:39,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2109020860, now seen corresponding path program 37 times [2021-06-05 13:51:39,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:39,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780692817] [2021-06-05 13:51:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:39,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780692817] [2021-06-05 13:51:39,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780692817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:39,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027703406] [2021-06-05 13:51:39,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:39,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:39,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:40,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027703406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:40,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:40,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:40,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405119207] [2021-06-05 13:51:40,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:40,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:40,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:40,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:40,040 INFO L87 Difference]: Start difference. First operand 9815 states and 36197 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:40,318 INFO L93 Difference]: Finished difference Result 10112 states and 36984 transitions. [2021-06-05 13:51:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:40,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:40,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:40,336 INFO L225 Difference]: With dead ends: 10112 [2021-06-05 13:51:40,336 INFO L226 Difference]: Without dead ends: 10046 [2021-06-05 13:51:40,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-06-05 13:51:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9840. [2021-06-05 13:51:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 3.6888911474743367) internal successors, (36295), 9839 states have internal predecessors, (36295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 36295 transitions. [2021-06-05 13:51:40,476 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 36295 transitions. Word has length 27 [2021-06-05 13:51:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:40,476 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 36295 transitions. [2021-06-05 13:51:40,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 36295 transitions. [2021-06-05 13:51:40,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:40,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:40,490 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:40,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 13:51:40,691 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:40,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:40,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1641622004, now seen corresponding path program 38 times [2021-06-05 13:51:40,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:40,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096250042] [2021-06-05 13:51:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:40,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:40,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096250042] [2021-06-05 13:51:40,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096250042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:40,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251798919] [2021-06-05 13:51:40,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:40,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:40,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:40,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:40,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:40,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251798919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:40,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:40,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:40,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432300366] [2021-06-05 13:51:40,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:40,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:40,973 INFO L87 Difference]: Start difference. First operand 9840 states and 36295 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:41,261 INFO L93 Difference]: Finished difference Result 10217 states and 37368 transitions. [2021-06-05 13:51:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:41,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:41,279 INFO L225 Difference]: With dead ends: 10217 [2021-06-05 13:51:41,279 INFO L226 Difference]: Without dead ends: 10187 [2021-06-05 13:51:41,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2021-06-05 13:51:41,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 9872. [2021-06-05 13:51:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9871 states have (on average 3.690102319927059) internal successors, (36425), 9871 states have internal predecessors, (36425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 36425 transitions. [2021-06-05 13:51:41,415 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 36425 transitions. Word has length 27 [2021-06-05 13:51:41,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:41,415 INFO L482 AbstractCegarLoop]: Abstraction has 9872 states and 36425 transitions. [2021-06-05 13:51:41,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 36425 transitions. [2021-06-05 13:51:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:41,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:41,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:41,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:41,629 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:41,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:41,629 INFO L82 PathProgramCache]: Analyzing trace with hash -776405308, now seen corresponding path program 39 times [2021-06-05 13:51:41,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:41,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664094304] [2021-06-05 13:51:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:51:41,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:41,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664094304] [2021-06-05 13:51:41,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664094304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:41,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800626230] [2021-06-05 13:51:41,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:41,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:51:41,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:41,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:41,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800626230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:41,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:41,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:41,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324553763] [2021-06-05 13:51:41,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:41,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:41,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:41,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:41,871 INFO L87 Difference]: Start difference. First operand 9872 states and 36425 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:42,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:42,060 INFO L93 Difference]: Finished difference Result 10876 states and 39384 transitions. [2021-06-05 13:51:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:42,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:42,082 INFO L225 Difference]: With dead ends: 10876 [2021-06-05 13:51:42,083 INFO L226 Difference]: Without dead ends: 10826 [2021-06-05 13:51:42,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:42,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-06-05 13:51:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10058. [2021-06-05 13:51:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 3.69424281594909) internal successors, (37153), 10057 states have internal predecessors, (37153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 37153 transitions. [2021-06-05 13:51:42,240 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 37153 transitions. Word has length 27 [2021-06-05 13:51:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:42,240 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 37153 transitions. [2021-06-05 13:51:42,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:42,240 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 37153 transitions. [2021-06-05 13:51:42,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:42,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:42,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:42,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 13:51:42,456 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 288417660, now seen corresponding path program 40 times [2021-06-05 13:51:42,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:42,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007675482] [2021-06-05 13:51:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:42,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007675482] [2021-06-05 13:51:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007675482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:42,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470806207] [2021-06-05 13:51:42,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:42,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:42,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:42,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470806207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:42,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:42,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:42,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439405325] [2021-06-05 13:51:42,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:42,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:42,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:42,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:42,719 INFO L87 Difference]: Start difference. First operand 10058 states and 37153 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:42,943 INFO L93 Difference]: Finished difference Result 10555 states and 38575 transitions. [2021-06-05 13:51:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:42,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:42,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:42,962 INFO L225 Difference]: With dead ends: 10555 [2021-06-05 13:51:42,962 INFO L226 Difference]: Without dead ends: 10525 [2021-06-05 13:51:42,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2021-06-05 13:51:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 10155. [2021-06-05 13:51:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10154 states have (on average 3.6938152452235573) internal successors, (37507), 10154 states have internal predecessors, (37507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 37507 transitions. [2021-06-05 13:51:43,110 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 37507 transitions. Word has length 27 [2021-06-05 13:51:43,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:43,110 INFO L482 AbstractCegarLoop]: Abstraction has 10155 states and 37507 transitions. [2021-06-05 13:51:43,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 37507 transitions. [2021-06-05 13:51:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:43,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:43,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:43,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 13:51:43,326 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:43,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:43,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1717656832, now seen corresponding path program 41 times [2021-06-05 13:51:43,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:43,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189585995] [2021-06-05 13:51:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:43,452 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 13:51:43,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:43,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:43,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189585995] [2021-06-05 13:51:43,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189585995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:43,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163162255] [2021-06-05 13:51:43,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:43,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:51:43,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:43,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163162255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:43,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:43,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:43,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600208894] [2021-06-05 13:51:43,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:43,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:43,699 INFO L87 Difference]: Start difference. First operand 10155 states and 37507 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:43,906 INFO L93 Difference]: Finished difference Result 10625 states and 38849 transitions. [2021-06-05 13:51:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:51:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:43,926 INFO L225 Difference]: With dead ends: 10625 [2021-06-05 13:51:43,926 INFO L226 Difference]: Without dead ends: 10529 [2021-06-05 13:51:43,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-06-05 13:51:44,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 10297. [2021-06-05 13:51:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 3.6916278166278165) internal successors, (38009), 10296 states have internal predecessors, (38009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 38009 transitions. [2021-06-05 13:51:44,080 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 38009 transitions. Word has length 27 [2021-06-05 13:51:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:44,080 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 38009 transitions. [2021-06-05 13:51:44,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:44,080 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 38009 transitions. [2021-06-05 13:51:44,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:44,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:44,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:44,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 13:51:44,295 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash 795869124, now seen corresponding path program 42 times [2021-06-05 13:51:44,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:44,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915605553] [2021-06-05 13:51:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:44,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:44,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915605553] [2021-06-05 13:51:44,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915605553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:44,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793259230] [2021-06-05 13:51:44,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:44,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:51:44,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:44,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793259230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:44,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:44,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:44,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486871382] [2021-06-05 13:51:44,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:44,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:44,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:44,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:44,544 INFO L87 Difference]: Start difference. First operand 10297 states and 38009 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:44,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:44,842 INFO L93 Difference]: Finished difference Result 11674 states and 42186 transitions. [2021-06-05 13:51:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:51:44,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:44,871 INFO L225 Difference]: With dead ends: 11674 [2021-06-05 13:51:44,871 INFO L226 Difference]: Without dead ends: 11640 [2021-06-05 13:51:44,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2021-06-05 13:51:45,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 10557. [2021-06-05 13:51:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10557 states, 10556 states have (on average 3.6996968548692686) internal successors, (39054), 10556 states have internal predecessors, (39054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 39054 transitions. [2021-06-05 13:51:45,074 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 39054 transitions. Word has length 27 [2021-06-05 13:51:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:45,074 INFO L482 AbstractCegarLoop]: Abstraction has 10557 states and 39054 transitions. [2021-06-05 13:51:45,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 39054 transitions. [2021-06-05 13:51:45,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:45,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:45,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:45,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 13:51:45,290 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1324830332, now seen corresponding path program 43 times [2021-06-05 13:51:45,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:45,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447897408] [2021-06-05 13:51:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:45,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447897408] [2021-06-05 13:51:45,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447897408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304386809] [2021-06-05 13:51:45,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:45,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304386809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:45,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:45,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:45,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943133477] [2021-06-05 13:51:45,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:45,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:45,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:45,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:45,551 INFO L87 Difference]: Start difference. First operand 10557 states and 39054 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:45,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:45,814 INFO L93 Difference]: Finished difference Result 10738 states and 39591 transitions. [2021-06-05 13:51:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:51:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:45,833 INFO L225 Difference]: With dead ends: 10738 [2021-06-05 13:51:45,834 INFO L226 Difference]: Without dead ends: 10723 [2021-06-05 13:51:45,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:51:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-06-05 13:51:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 10592. [2021-06-05 13:51:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.6990841280332356) internal successors, (39177), 10591 states have internal predecessors, (39177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 39177 transitions. [2021-06-05 13:51:45,979 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 39177 transitions. Word has length 27 [2021-06-05 13:51:45,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:45,979 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 39177 transitions. [2021-06-05 13:51:45,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 39177 transitions. [2021-06-05 13:51:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:45,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:45,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:46,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:46,194 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:46,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1318209680, now seen corresponding path program 44 times [2021-06-05 13:51:46,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:46,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968163139] [2021-06-05 13:51:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:46,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968163139] [2021-06-05 13:51:46,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968163139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098784503] [2021-06-05 13:51:46,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:46,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:46,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:46,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:46,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098784503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:46,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:46,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:46,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985687772] [2021-06-05 13:51:46,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:46,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:46,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:46,495 INFO L87 Difference]: Start difference. First operand 10592 states and 39177 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:46,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:46,755 INFO L93 Difference]: Finished difference Result 11042 states and 40414 transitions. [2021-06-05 13:51:46,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:46,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:46,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:46,777 INFO L225 Difference]: With dead ends: 11042 [2021-06-05 13:51:46,777 INFO L226 Difference]: Without dead ends: 10965 [2021-06-05 13:51:46,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10965 states. [2021-06-05 13:51:46,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 10686. [2021-06-05 13:51:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10685 states have (on average 3.6966775854000935) internal successors, (39499), 10685 states have internal predecessors, (39499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 39499 transitions. [2021-06-05 13:51:46,953 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 39499 transitions. Word has length 27 [2021-06-05 13:51:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:46,953 INFO L482 AbstractCegarLoop]: Abstraction has 10686 states and 39499 transitions. [2021-06-05 13:51:46,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 39499 transitions. [2021-06-05 13:51:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:46,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:46,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:47,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 13:51:47,170 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:47,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:47,170 INFO L82 PathProgramCache]: Analyzing trace with hash 994404404, now seen corresponding path program 45 times [2021-06-05 13:51:47,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:47,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632167360] [2021-06-05 13:51:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:47,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:47,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632167360] [2021-06-05 13:51:47,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632167360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:47,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273034250] [2021-06-05 13:51:47,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:47,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:51:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273034250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:47,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926683976] [2021-06-05 13:51:47,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:47,413 INFO L87 Difference]: Start difference. First operand 10686 states and 39499 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:47,721 INFO L93 Difference]: Finished difference Result 11185 states and 40920 transitions. [2021-06-05 13:51:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:47,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:47,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:47,742 INFO L225 Difference]: With dead ends: 11185 [2021-06-05 13:51:47,742 INFO L226 Difference]: Without dead ends: 11145 [2021-06-05 13:51:47,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11145 states. [2021-06-05 13:51:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11145 to 10743. [2021-06-05 13:51:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 3.6983801899087694) internal successors, (39728), 10742 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 39728 transitions. [2021-06-05 13:51:47,986 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 39728 transitions. Word has length 27 [2021-06-05 13:51:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:47,986 INFO L482 AbstractCegarLoop]: Abstraction has 10743 states and 39728 transitions. [2021-06-05 13:51:47,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 39728 transitions. [2021-06-05 13:51:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:48,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:48,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:48,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:48,203 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash -281548736, now seen corresponding path program 46 times [2021-06-05 13:51:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:48,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374811572] [2021-06-05 13:51:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:48,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:48,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:48,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374811572] [2021-06-05 13:51:48,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374811572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:48,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085912281] [2021-06-05 13:51:48,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:48,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:48,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:48,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:48,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085912281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:48,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:48,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:48,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421202010] [2021-06-05 13:51:48,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:48,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:48,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:48,597 INFO L87 Difference]: Start difference. First operand 10743 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:48,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:48,929 INFO L93 Difference]: Finished difference Result 10899 states and 40153 transitions. [2021-06-05 13:51:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:51:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:48,951 INFO L225 Difference]: With dead ends: 10899 [2021-06-05 13:51:48,951 INFO L226 Difference]: Without dead ends: 10871 [2021-06-05 13:51:48,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 288.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:51:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-06-05 13:51:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10760. [2021-06-05 13:51:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 3.698299098429222) internal successors, (39790), 10759 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:49,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 39790 transitions. [2021-06-05 13:51:49,144 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 39790 transitions. Word has length 27 [2021-06-05 13:51:49,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:49,145 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 39790 transitions. [2021-06-05 13:51:49,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 39790 transitions. [2021-06-05 13:51:49,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:49,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:49,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:49,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 13:51:49,365 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:49,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:49,365 INFO L82 PathProgramCache]: Analyzing trace with hash -798239440, now seen corresponding path program 47 times [2021-06-05 13:51:49,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:49,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22377513] [2021-06-05 13:51:49,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:49,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22377513] [2021-06-05 13:51:49,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22377513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701841833] [2021-06-05 13:51:49,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:49,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:51:49,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:49,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:49,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701841833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:49,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:49,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:49,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739763896] [2021-06-05 13:51:49,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:49,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:49,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:49,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:49,623 INFO L87 Difference]: Start difference. First operand 10760 states and 39790 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:49,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:49,851 INFO L93 Difference]: Finished difference Result 11018 states and 40428 transitions. [2021-06-05 13:51:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:49,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:49,875 INFO L225 Difference]: With dead ends: 11018 [2021-06-05 13:51:49,875 INFO L226 Difference]: Without dead ends: 10908 [2021-06-05 13:51:49,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 187.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10908 states. [2021-06-05 13:51:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10908 to 10812. [2021-06-05 13:51:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10811 states have (on average 3.696790306169642) internal successors, (39966), 10811 states have internal predecessors, (39966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 39966 transitions. [2021-06-05 13:51:50,045 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 39966 transitions. Word has length 27 [2021-06-05 13:51:50,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:50,045 INFO L482 AbstractCegarLoop]: Abstraction has 10812 states and 39966 transitions. [2021-06-05 13:51:50,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 39966 transitions. [2021-06-05 13:51:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:50,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:50,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:50,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 13:51:50,261 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:50,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:50,261 INFO L82 PathProgramCache]: Analyzing trace with hash -603556108, now seen corresponding path program 48 times [2021-06-05 13:51:50,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:50,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596953526] [2021-06-05 13:51:50,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:50,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:50,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596953526] [2021-06-05 13:51:50,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596953526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:50,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310051263] [2021-06-05 13:51:50,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:50,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:51:50,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:50,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:50,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310051263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:50,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:50,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:50,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771890730] [2021-06-05 13:51:50,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:50,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:50,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:50,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:50,528 INFO L87 Difference]: Start difference. First operand 10812 states and 39966 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:50,787 INFO L93 Difference]: Finished difference Result 11294 states and 41303 transitions. [2021-06-05 13:51:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:50,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:50,808 INFO L225 Difference]: With dead ends: 11294 [2021-06-05 13:51:50,808 INFO L226 Difference]: Without dead ends: 11195 [2021-06-05 13:51:50,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2021-06-05 13:51:50,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 10917. [2021-06-05 13:51:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 10916 states have (on average 3.6943019421033347) internal successors, (40327), 10916 states have internal predecessors, (40327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 40327 transitions. [2021-06-05 13:51:50,979 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 40327 transitions. Word has length 27 [2021-06-05 13:51:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:50,979 INFO L482 AbstractCegarLoop]: Abstraction has 10917 states and 40327 transitions. [2021-06-05 13:51:50,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 40327 transitions. [2021-06-05 13:51:50,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:50,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:50,996 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:51,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:51,197 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1085062076, now seen corresponding path program 49 times [2021-06-05 13:51:51,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:51,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359966244] [2021-06-05 13:51:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:51,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:51,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359966244] [2021-06-05 13:51:51,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359966244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:51,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576314264] [2021-06-05 13:51:51,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:51,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576314264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:51,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:51,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:51,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901329091] [2021-06-05 13:51:51,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:51,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:51,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:51,546 INFO L87 Difference]: Start difference. First operand 10917 states and 40327 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:51,784 INFO L93 Difference]: Finished difference Result 11367 states and 41606 transitions. [2021-06-05 13:51:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:51,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:51,806 INFO L225 Difference]: With dead ends: 11367 [2021-06-05 13:51:51,806 INFO L226 Difference]: Without dead ends: 11337 [2021-06-05 13:51:51,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-06-05 13:51:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 10979. [2021-06-05 13:51:51,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.69484423392239) internal successors, (40562), 10978 states have internal predecessors, (40562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 40562 transitions. [2021-06-05 13:51:51,963 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 40562 transitions. Word has length 27 [2021-06-05 13:51:51,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:51,963 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 40562 transitions. [2021-06-05 13:51:51,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 40562 transitions. [2021-06-05 13:51:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:51,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:51,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:52,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 13:51:52,180 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:52,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -70991296, now seen corresponding path program 50 times [2021-06-05 13:51:52,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:52,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325602935] [2021-06-05 13:51:52,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:51:52,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:52,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325602935] [2021-06-05 13:51:52,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325602935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:52,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408243469] [2021-06-05 13:51:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:52,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:52,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:52,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:52,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408243469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:52,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:52,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:52,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287014913] [2021-06-05 13:51:52,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:52,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:52,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:52,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:52,402 INFO L87 Difference]: Start difference. First operand 10979 states and 40562 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:52,650 INFO L93 Difference]: Finished difference Result 11407 states and 41736 transitions. [2021-06-05 13:51:52,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:52,650 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:52,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:52,672 INFO L225 Difference]: With dead ends: 11407 [2021-06-05 13:51:52,672 INFO L226 Difference]: Without dead ends: 11315 [2021-06-05 13:51:52,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2021-06-05 13:51:52,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11054. [2021-06-05 13:51:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.694743508549715) internal successors, (40838), 11053 states have internal predecessors, (40838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 40838 transitions. [2021-06-05 13:51:52,842 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 40838 transitions. Word has length 27 [2021-06-05 13:51:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:52,842 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 40838 transitions. [2021-06-05 13:51:52,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 40838 transitions. [2021-06-05 13:51:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:52,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:52,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:53,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 13:51:53,059 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash 993593664, now seen corresponding path program 51 times [2021-06-05 13:51:53,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:53,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142811756] [2021-06-05 13:51:53,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:53,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:53,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142811756] [2021-06-05 13:51:53,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142811756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:53,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238593041] [2021-06-05 13:51:53,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:53,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:51:53,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:53,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:53,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:53,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238593041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:53,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:53,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:53,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708284848] [2021-06-05 13:51:53,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:53,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:53,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:53,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:53,352 INFO L87 Difference]: Start difference. First operand 11054 states and 40838 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:53,645 INFO L93 Difference]: Finished difference Result 11235 states and 41375 transitions. [2021-06-05 13:51:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:53,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:53,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:53,667 INFO L225 Difference]: With dead ends: 11235 [2021-06-05 13:51:53,667 INFO L226 Difference]: Without dead ends: 11220 [2021-06-05 13:51:53,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:53,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-06-05 13:51:53,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 11078. [2021-06-05 13:51:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 11077 states have (on average 3.6932382414011014) internal successors, (40910), 11077 states have internal predecessors, (40910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:53,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 40910 transitions. [2021-06-05 13:51:53,832 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 40910 transitions. Word has length 27 [2021-06-05 13:51:53,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:53,832 INFO L482 AbstractCegarLoop]: Abstraction has 11078 states and 40910 transitions. [2021-06-05 13:51:53,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 40910 transitions. [2021-06-05 13:51:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:53,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:53,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:54,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 13:51:54,048 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 476902960, now seen corresponding path program 52 times [2021-06-05 13:51:54,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:54,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508441057] [2021-06-05 13:51:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:54,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:54,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508441057] [2021-06-05 13:51:54,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508441057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:54,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115269008] [2021-06-05 13:51:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:54,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:51:54,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:54,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:54,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:54,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115269008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:54,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:54,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:54,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351723006] [2021-06-05 13:51:54,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:54,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:54,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:54,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:54,328 INFO L87 Difference]: Start difference. First operand 11078 states and 40910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:54,571 INFO L93 Difference]: Finished difference Result 11379 states and 41715 transitions. [2021-06-05 13:51:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:54,593 INFO L225 Difference]: With dead ends: 11379 [2021-06-05 13:51:54,593 INFO L226 Difference]: Without dead ends: 11313 [2021-06-05 13:51:54,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2021-06-05 13:51:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11126. [2021-06-05 13:51:54,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 11125 states have (on average 3.6934831460674156) internal successors, (41090), 11125 states have internal predecessors, (41090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:54,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 41090 transitions. [2021-06-05 13:51:54,812 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 41090 transitions. Word has length 27 [2021-06-05 13:51:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:54,812 INFO L482 AbstractCegarLoop]: Abstraction has 11126 states and 41090 transitions. [2021-06-05 13:51:54,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:54,812 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 41090 transitions. [2021-06-05 13:51:54,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:54,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:54,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:55,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:55,029 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:55,029 INFO L82 PathProgramCache]: Analyzing trace with hash 671586292, now seen corresponding path program 53 times [2021-06-05 13:51:55,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:55,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356632695] [2021-06-05 13:51:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:55,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:55,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356632695] [2021-06-05 13:51:55,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356632695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:55,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962133638] [2021-06-05 13:51:55,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:55,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:51:55,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:55,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:55,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:55,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962133638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:55,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:55,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:55,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197383891] [2021-06-05 13:51:55,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:55,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:55,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:55,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:55,317 INFO L87 Difference]: Start difference. First operand 11126 states and 41090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:55,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:55,579 INFO L93 Difference]: Finished difference Result 11510 states and 42198 transitions. [2021-06-05 13:51:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:55,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:55,601 INFO L225 Difference]: With dead ends: 11510 [2021-06-05 13:51:55,601 INFO L226 Difference]: Without dead ends: 11480 [2021-06-05 13:51:55,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:55,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11480 states. [2021-06-05 13:51:55,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11480 to 11156. [2021-06-05 13:51:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.696100403406544) internal successors, (41230), 11155 states have internal predecessors, (41230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 41230 transitions. [2021-06-05 13:51:55,773 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 41230 transitions. Word has length 27 [2021-06-05 13:51:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:55,774 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 41230 transitions. [2021-06-05 13:51:55,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 41230 transitions. [2021-06-05 13:51:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:55,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:55,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:55,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:55,990 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash 941151852, now seen corresponding path program 54 times [2021-06-05 13:51:55,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:55,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693666501] [2021-06-05 13:51:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:56,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:56,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693666501] [2021-06-05 13:51:56,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693666501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:56,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792911670] [2021-06-05 13:51:56,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:56,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:51:56,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:56,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:56,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:56,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792911670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:56,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:56,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:56,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961438571] [2021-06-05 13:51:56,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:56,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:56,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:56,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:56,272 INFO L87 Difference]: Start difference. First operand 11156 states and 41230 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:56,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:56,567 INFO L93 Difference]: Finished difference Result 11580 states and 42454 transitions. [2021-06-05 13:51:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:56,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:56,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:56,589 INFO L225 Difference]: With dead ends: 11580 [2021-06-05 13:51:56,589 INFO L226 Difference]: Without dead ends: 11550 [2021-06-05 13:51:56,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-06-05 13:51:56,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11232. [2021-06-05 13:51:56,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 3.6960199447956548) internal successors, (41510), 11231 states have internal predecessors, (41510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 41510 transitions. [2021-06-05 13:51:56,767 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 41510 transitions. Word has length 27 [2021-06-05 13:51:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:56,767 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 41510 transitions. [2021-06-05 13:51:56,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 41510 transitions. [2021-06-05 13:51:56,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:56,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:56,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:56,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:56,987 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:56,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:56,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1135835184, now seen corresponding path program 55 times [2021-06-05 13:51:56,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:56,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083397244] [2021-06-05 13:51:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:57,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083397244] [2021-06-05 13:51:57,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083397244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:57,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923414000] [2021-06-05 13:51:57,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:57,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923414000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:57,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:57,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179543419] [2021-06-05 13:51:57,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:57,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:57,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:57,263 INFO L87 Difference]: Start difference. First operand 11232 states and 41510 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:57,552 INFO L93 Difference]: Finished difference Result 11545 states and 42403 transitions. [2021-06-05 13:51:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:57,574 INFO L225 Difference]: With dead ends: 11545 [2021-06-05 13:51:57,574 INFO L226 Difference]: Without dead ends: 11507 [2021-06-05 13:51:57,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:51:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2021-06-05 13:51:57,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11272. [2021-06-05 13:51:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.6969213024576346) internal successors, (41668), 11271 states have internal predecessors, (41668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:57,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 41668 transitions. [2021-06-05 13:51:57,800 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 41668 transitions. Word has length 27 [2021-06-05 13:51:57,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:57,800 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 41668 transitions. [2021-06-05 13:51:57,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:57,800 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 41668 transitions. [2021-06-05 13:51:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:57,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:57,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:58,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:58,018 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1936586544, now seen corresponding path program 56 times [2021-06-05 13:51:58,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:58,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663142698] [2021-06-05 13:51:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:58,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:58,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663142698] [2021-06-05 13:51:58,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663142698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:58,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452902616] [2021-06-05 13:51:58,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:58,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:51:58,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:58,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:58,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452902616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:58,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:58,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:51:58,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605087553] [2021-06-05 13:51:58,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:51:58,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:51:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:58,324 INFO L87 Difference]: Start difference. First operand 11272 states and 41668 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:58,673 INFO L93 Difference]: Finished difference Result 11437 states and 42157 transitions. [2021-06-05 13:51:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:51:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:58,703 INFO L225 Difference]: With dead ends: 11437 [2021-06-05 13:51:58,703 INFO L226 Difference]: Without dead ends: 11422 [2021-06-05 13:51:58,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:51:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11422 states. [2021-06-05 13:51:58,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11422 to 11302. [2021-06-05 13:51:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11302 states, 11301 states have (on average 3.6956021591009645) internal successors, (41764), 11301 states have internal predecessors, (41764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11302 states to 11302 states and 41764 transitions. [2021-06-05 13:51:58,900 INFO L78 Accepts]: Start accepts. Automaton has 11302 states and 41764 transitions. Word has length 27 [2021-06-05 13:51:58,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:58,900 INFO L482 AbstractCegarLoop]: Abstraction has 11302 states and 41764 transitions. [2021-06-05 13:51:58,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:58,900 INFO L276 IsEmpty]: Start isEmpty. Operand 11302 states and 41764 transitions. [2021-06-05 13:51:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:58,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:58,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:59,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 13:51:59,118 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1960365508, now seen corresponding path program 57 times [2021-06-05 13:51:59,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:59,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417502616] [2021-06-05 13:51:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:51:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:59,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:51:59,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417502616] [2021-06-05 13:51:59,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417502616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:59,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261623208] [2021-06-05 13:51:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:59,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:51:59,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:51:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:51:59,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:51:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:51:59,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261623208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:51:59,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:51:59,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:51:59,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472949724] [2021-06-05 13:51:59,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:51:59,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:51:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:51:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:51:59,343 INFO L87 Difference]: Start difference. First operand 11302 states and 41764 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:59,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:51:59,543 INFO L93 Difference]: Finished difference Result 11677 states and 42772 transitions. [2021-06-05 13:51:59,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:51:59,543 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:51:59,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:51:59,565 INFO L225 Difference]: With dead ends: 11677 [2021-06-05 13:51:59,565 INFO L226 Difference]: Without dead ends: 11625 [2021-06-05 13:51:59,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:51:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11625 states. [2021-06-05 13:51:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11625 to 11308. [2021-06-05 13:51:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11308 states, 11307 states have (on average 3.6952330414787298) internal successors, (41782), 11307 states have internal predecessors, (41782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11308 states to 11308 states and 41782 transitions. [2021-06-05 13:51:59,754 INFO L78 Accepts]: Start accepts. Automaton has 11308 states and 41782 transitions. Word has length 27 [2021-06-05 13:51:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:51:59,754 INFO L482 AbstractCegarLoop]: Abstraction has 11308 states and 41782 transitions. [2021-06-05 13:51:59,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:51:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 11308 states and 41782 transitions. [2021-06-05 13:51:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:51:59,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:51:59,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:51:59,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:51:59,975 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:51:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:51:59,976 INFO L82 PathProgramCache]: Analyzing trace with hash 352248576, now seen corresponding path program 58 times [2021-06-05 13:51:59,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:51:59,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329914399] [2021-06-05 13:51:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:51:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:00,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:00,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329914399] [2021-06-05 13:52:00,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329914399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:00,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779169247] [2021-06-05 13:52:00,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:00,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:00,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:00,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:00,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:00,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779169247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:00,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:00,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238142269] [2021-06-05 13:52:00,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:00,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:00,208 INFO L87 Difference]: Start difference. First operand 11308 states and 41782 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:00,452 INFO L93 Difference]: Finished difference Result 11704 states and 42906 transitions. [2021-06-05 13:52:00,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:00,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:00,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:00,476 INFO L225 Difference]: With dead ends: 11704 [2021-06-05 13:52:00,476 INFO L226 Difference]: Without dead ends: 11674 [2021-06-05 13:52:00,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:00,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-06-05 13:52:00,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11310. [2021-06-05 13:52:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11310 states, 11309 states have (on average 3.695463789901848) internal successors, (41792), 11309 states have internal predecessors, (41792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 41792 transitions. [2021-06-05 13:52:00,663 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 41792 transitions. Word has length 27 [2021-06-05 13:52:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:00,663 INFO L482 AbstractCegarLoop]: Abstraction has 11310 states and 41792 transitions. [2021-06-05 13:52:00,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 41792 transitions. [2021-06-05 13:52:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:00,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:00,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:00,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 13:52:00,879 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:00,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:00,880 INFO L82 PathProgramCache]: Analyzing trace with hash -531126336, now seen corresponding path program 59 times [2021-06-05 13:52:00,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:00,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640773791] [2021-06-05 13:52:00,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:00,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:00,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640773791] [2021-06-05 13:52:00,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640773791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:00,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360583354] [2021-06-05 13:52:00,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:01,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:52:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:01,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:01,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:01,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360583354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:01,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:01,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15407248] [2021-06-05 13:52:01,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:01,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:01,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:01,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:01,238 INFO L87 Difference]: Start difference. First operand 11310 states and 41792 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:01,487 INFO L93 Difference]: Finished difference Result 11586 states and 42494 transitions. [2021-06-05 13:52:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:01,512 INFO L225 Difference]: With dead ends: 11586 [2021-06-05 13:52:01,513 INFO L226 Difference]: Without dead ends: 11512 [2021-06-05 13:52:01,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2021-06-05 13:52:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 11372. [2021-06-05 13:52:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11372 states, 11371 states have (on average 3.692639169817958) internal successors, (41989), 11371 states have internal predecessors, (41989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:01,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 41989 transitions. [2021-06-05 13:52:01,746 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 41989 transitions. Word has length 27 [2021-06-05 13:52:01,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:01,746 INFO L482 AbstractCegarLoop]: Abstraction has 11372 states and 41989 transitions. [2021-06-05 13:52:01,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:01,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 41989 transitions. [2021-06-05 13:52:01,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:01,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:01,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:01,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:01,969 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1957542588, now seen corresponding path program 60 times [2021-06-05 13:52:01,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250503326] [2021-06-05 13:52:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:02,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250503326] [2021-06-05 13:52:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250503326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056043510] [2021-06-05 13:52:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:02,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:52:02,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:02,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:02,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:02,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056043510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:02,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:02,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838469465] [2021-06-05 13:52:02,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:02,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:02,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:02,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:02,245 INFO L87 Difference]: Start difference. First operand 11372 states and 41989 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:02,501 INFO L93 Difference]: Finished difference Result 11723 states and 42964 transitions. [2021-06-05 13:52:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:02,502 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:02,522 INFO L225 Difference]: With dead ends: 11723 [2021-06-05 13:52:02,522 INFO L226 Difference]: Without dead ends: 11685 [2021-06-05 13:52:02,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11685 states. [2021-06-05 13:52:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11685 to 11411. [2021-06-05 13:52:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11411 states, 11410 states have (on average 3.692900964066608) internal successors, (42136), 11410 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11411 states to 11411 states and 42136 transitions. [2021-06-05 13:52:02,694 INFO L78 Accepts]: Start accepts. Automaton has 11411 states and 42136 transitions. Word has length 27 [2021-06-05 13:52:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:02,695 INFO L482 AbstractCegarLoop]: Abstraction has 11411 states and 42136 transitions. [2021-06-05 13:52:02,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 11411 states and 42136 transitions. [2021-06-05 13:52:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:02,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:02,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:02,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 13:52:02,911 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:02,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash -889299460, now seen corresponding path program 61 times [2021-06-05 13:52:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:02,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199779580] [2021-06-05 13:52:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:02,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199779580] [2021-06-05 13:52:02,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199779580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587879773] [2021-06-05 13:52:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:03,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:03,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:03,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587879773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:03,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:03,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:03,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887293447] [2021-06-05 13:52:03,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:03,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:03,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:03,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:03,161 INFO L87 Difference]: Start difference. First operand 11411 states and 42136 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:03,403 INFO L93 Difference]: Finished difference Result 11793 states and 43179 transitions. [2021-06-05 13:52:03,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:03,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:03,425 INFO L225 Difference]: With dead ends: 11793 [2021-06-05 13:52:03,425 INFO L226 Difference]: Without dead ends: 11741 [2021-06-05 13:52:03,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-06-05 13:52:03,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11475. [2021-06-05 13:52:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11475 states, 11474 states have (on average 3.6911277671256753) internal successors, (42352), 11474 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11475 states to 11475 states and 42352 transitions. [2021-06-05 13:52:03,655 INFO L78 Accepts]: Start accepts. Automaton has 11475 states and 42352 transitions. Word has length 27 [2021-06-05 13:52:03,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:03,655 INFO L482 AbstractCegarLoop]: Abstraction has 11475 states and 42352 transitions. [2021-06-05 13:52:03,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:03,656 INFO L276 IsEmpty]: Start isEmpty. Operand 11475 states and 42352 transitions. [2021-06-05 13:52:03,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:03,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:03,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:03,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:03,903 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:03,904 INFO L82 PathProgramCache]: Analyzing trace with hash -421900604, now seen corresponding path program 62 times [2021-06-05 13:52:03,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:03,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784136139] [2021-06-05 13:52:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:04,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:04,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784136139] [2021-06-05 13:52:04,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784136139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:04,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913446209] [2021-06-05 13:52:04,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:04,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:04,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:04,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913446209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:04,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:04,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:04,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959775011] [2021-06-05 13:52:04,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:04,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:04,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:04,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:04,195 INFO L87 Difference]: Start difference. First operand 11475 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:04,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:04,393 INFO L93 Difference]: Finished difference Result 11715 states and 42996 transitions. [2021-06-05 13:52:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:04,394 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:04,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:04,416 INFO L225 Difference]: With dead ends: 11715 [2021-06-05 13:52:04,416 INFO L226 Difference]: Without dead ends: 11659 [2021-06-05 13:52:04,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-06-05 13:52:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11503. [2021-06-05 13:52:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.691531907494349) internal successors, (42460), 11502 states have internal predecessors, (42460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:04,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 42460 transitions. [2021-06-05 13:52:04,596 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 42460 transitions. Word has length 27 [2021-06-05 13:52:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:04,596 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 42460 transitions. [2021-06-05 13:52:04,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 42460 transitions. [2021-06-05 13:52:04,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:04,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:04,614 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:04,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:04,814 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:04,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:04,815 INFO L82 PathProgramCache]: Analyzing trace with hash 85705924, now seen corresponding path program 63 times [2021-06-05 13:52:04,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:04,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850026001] [2021-06-05 13:52:04,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:04,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:04,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850026001] [2021-06-05 13:52:04,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850026001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:04,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705080401] [2021-06-05 13:52:04,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:05,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:52:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:05,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:05,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705080401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:05,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:05,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:05,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989997771] [2021-06-05 13:52:05,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:05,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:05,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:05,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:05,211 INFO L87 Difference]: Start difference. First operand 11503 states and 42460 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:05,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:05,483 INFO L93 Difference]: Finished difference Result 11675 states and 42930 transitions. [2021-06-05 13:52:05,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:52:05,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:05,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:05,507 INFO L225 Difference]: With dead ends: 11675 [2021-06-05 13:52:05,508 INFO L226 Difference]: Without dead ends: 11649 [2021-06-05 13:52:05,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 265.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11649 states. [2021-06-05 13:52:05,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11649 to 11510. [2021-06-05 13:52:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 11509 states have (on average 3.6920670779390043) internal successors, (42492), 11509 states have internal predecessors, (42492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 42492 transitions. [2021-06-05 13:52:05,686 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 42492 transitions. Word has length 27 [2021-06-05 13:52:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:05,686 INFO L482 AbstractCegarLoop]: Abstraction has 11510 states and 42492 transitions. [2021-06-05 13:52:05,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 42492 transitions. [2021-06-05 13:52:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:05,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:05,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:05,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 13:52:05,903 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:05,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:05,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1402020932, now seen corresponding path program 64 times [2021-06-05 13:52:05,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:05,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605740298] [2021-06-05 13:52:05,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:05,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605740298] [2021-06-05 13:52:05,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605740298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694900214] [2021-06-05 13:52:05,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:06,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:06,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:06,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:06,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:06,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694900214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:06,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:06,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:06,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604853419] [2021-06-05 13:52:06,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:06,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:06,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:06,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:06,174 INFO L87 Difference]: Start difference. First operand 11510 states and 42492 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:06,488 INFO L93 Difference]: Finished difference Result 12092 states and 44144 transitions. [2021-06-05 13:52:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:06,511 INFO L225 Difference]: With dead ends: 12092 [2021-06-05 13:52:06,512 INFO L226 Difference]: Without dead ends: 12062 [2021-06-05 13:52:06,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:06,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2021-06-05 13:52:06,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 11576. [2021-06-05 13:52:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11576 states, 11575 states have (on average 3.691317494600432) internal successors, (42727), 11575 states have internal predecessors, (42727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11576 states to 11576 states and 42727 transitions. [2021-06-05 13:52:06,702 INFO L78 Accepts]: Start accepts. Automaton has 11576 states and 42727 transitions. Word has length 27 [2021-06-05 13:52:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:06,702 INFO L482 AbstractCegarLoop]: Abstraction has 11576 states and 42727 transitions. [2021-06-05 13:52:06,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 11576 states and 42727 transitions. [2021-06-05 13:52:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:06,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:06,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:06,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:06,920 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1736892992, now seen corresponding path program 65 times [2021-06-05 13:52:06,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:06,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976964636] [2021-06-05 13:52:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:06,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:06,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976964636] [2021-06-05 13:52:06,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976964636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:06,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904190522] [2021-06-05 13:52:06,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:07,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:52:07,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:07,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:07,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904190522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:07,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:07,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:07,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005820365] [2021-06-05 13:52:07,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:07,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:07,163 INFO L87 Difference]: Start difference. First operand 11576 states and 42727 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:07,465 INFO L93 Difference]: Finished difference Result 11997 states and 43864 transitions. [2021-06-05 13:52:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:07,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:07,488 INFO L225 Difference]: With dead ends: 11997 [2021-06-05 13:52:07,488 INFO L226 Difference]: Without dead ends: 11917 [2021-06-05 13:52:07,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11917 states. [2021-06-05 13:52:07,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11917 to 11602. [2021-06-05 13:52:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11602 states, 11601 states have (on average 3.6938194983191104) internal successors, (42852), 11601 states have internal predecessors, (42852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11602 states to 11602 states and 42852 transitions. [2021-06-05 13:52:07,676 INFO L78 Accepts]: Start accepts. Automaton has 11602 states and 42852 transitions. Word has length 27 [2021-06-05 13:52:07,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:07,676 INFO L482 AbstractCegarLoop]: Abstraction has 11602 states and 42852 transitions. [2021-06-05 13:52:07,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 11602 states and 42852 transitions. [2021-06-05 13:52:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:07,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:07,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:07,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:07,894 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash -73533572, now seen corresponding path program 66 times [2021-06-05 13:52:07,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:07,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977459867] [2021-06-05 13:52:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:07,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:07,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977459867] [2021-06-05 13:52:07,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977459867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:07,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576684445] [2021-06-05 13:52:07,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:07,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:52:07,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:07,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:07,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:08,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576684445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:08,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:08,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599173213] [2021-06-05 13:52:08,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:08,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:08,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:08,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:08,155 INFO L87 Difference]: Start difference. First operand 11602 states and 42852 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:08,408 INFO L93 Difference]: Finished difference Result 11771 states and 43353 transitions. [2021-06-05 13:52:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:52:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:08,431 INFO L225 Difference]: With dead ends: 11771 [2021-06-05 13:52:08,431 INFO L226 Difference]: Without dead ends: 11756 [2021-06-05 13:52:08,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:08,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11756 states. [2021-06-05 13:52:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11756 to 11607. [2021-06-05 13:52:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11607 states, 11606 states have (on average 3.694468378424953) internal successors, (42878), 11606 states have internal predecessors, (42878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11607 states to 11607 states and 42878 transitions. [2021-06-05 13:52:08,687 INFO L78 Accepts]: Start accepts. Automaton has 11607 states and 42878 transitions. Word has length 27 [2021-06-05 13:52:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:08,687 INFO L482 AbstractCegarLoop]: Abstraction has 11607 states and 42878 transitions. [2021-06-05 13:52:08,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 11607 states and 42878 transitions. [2021-06-05 13:52:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:08,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:08,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:08,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 13:52:08,905 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash -819151172, now seen corresponding path program 67 times [2021-06-05 13:52:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:08,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772517217] [2021-06-05 13:52:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:08,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:08,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772517217] [2021-06-05 13:52:08,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772517217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:08,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468308071] [2021-06-05 13:52:08,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:09,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468308071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:09,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:09,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:09,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78926168] [2021-06-05 13:52:09,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:09,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:09,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:09,128 INFO L87 Difference]: Start difference. First operand 11607 states and 42878 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:09,399 INFO L93 Difference]: Finished difference Result 13036 states and 47204 transitions. [2021-06-05 13:52:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:52:09,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:09,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:09,425 INFO L225 Difference]: With dead ends: 13036 [2021-06-05 13:52:09,425 INFO L226 Difference]: Without dead ends: 12976 [2021-06-05 13:52:09,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-06-05 13:52:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 11956. [2021-06-05 13:52:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 11955 states have (on average 3.700710999581765) internal successors, (44242), 11955 states have internal predecessors, (44242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 44242 transitions. [2021-06-05 13:52:09,617 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 44242 transitions. Word has length 27 [2021-06-05 13:52:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:09,617 INFO L482 AbstractCegarLoop]: Abstraction has 11956 states and 44242 transitions. [2021-06-05 13:52:09,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 44242 transitions. [2021-06-05 13:52:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:09,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:09,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:09,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:09,834 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1181413760, now seen corresponding path program 68 times [2021-06-05 13:52:09,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:09,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602330846] [2021-06-05 13:52:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:09,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602330846] [2021-06-05 13:52:09,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602330846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:09,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805642895] [2021-06-05 13:52:09,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:09,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:09,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:09,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:09,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:10,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805642895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:10,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:10,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:10,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503034816] [2021-06-05 13:52:10,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:10,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:10,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:10,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:10,093 INFO L87 Difference]: Start difference. First operand 11956 states and 44242 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:10,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:10,279 INFO L93 Difference]: Finished difference Result 12395 states and 45519 transitions. [2021-06-05 13:52:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:10,303 INFO L225 Difference]: With dead ends: 12395 [2021-06-05 13:52:10,303 INFO L226 Difference]: Without dead ends: 12365 [2021-06-05 13:52:10,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2021-06-05 13:52:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 11952. [2021-06-05 13:52:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11952 states, 11951 states have (on average 3.7014475776085685) internal successors, (44236), 11951 states have internal predecessors, (44236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11952 states to 11952 states and 44236 transitions. [2021-06-05 13:52:10,483 INFO L78 Accepts]: Start accepts. Automaton has 11952 states and 44236 transitions. Word has length 27 [2021-06-05 13:52:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:10,483 INFO L482 AbstractCegarLoop]: Abstraction has 11952 states and 44236 transitions. [2021-06-05 13:52:10,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 11952 states and 44236 transitions. [2021-06-05 13:52:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:10,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:10,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:10,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 13:52:10,705 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:10,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:10,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1510401284, now seen corresponding path program 69 times [2021-06-05 13:52:10,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:10,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560962527] [2021-06-05 13:52:10,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:10,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:10,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560962527] [2021-06-05 13:52:10,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560962527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:10,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497310423] [2021-06-05 13:52:10,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:10,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:52:10,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:10,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:10,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:10,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497310423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:10,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:10,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:10,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908037002] [2021-06-05 13:52:10,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:10,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:10,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:10,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:10,952 INFO L87 Difference]: Start difference. First operand 11952 states and 44236 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:11,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:11,120 INFO L93 Difference]: Finished difference Result 12368 states and 45416 transitions. [2021-06-05 13:52:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:11,142 INFO L225 Difference]: With dead ends: 12368 [2021-06-05 13:52:11,142 INFO L226 Difference]: Without dead ends: 12338 [2021-06-05 13:52:11,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2021-06-05 13:52:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 11996. [2021-06-05 13:52:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 3.7018757815756564) internal successors, (44404), 11995 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 44404 transitions. [2021-06-05 13:52:11,323 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 44404 transitions. Word has length 27 [2021-06-05 13:52:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:11,323 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 44404 transitions. [2021-06-05 13:52:11,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 44404 transitions. [2021-06-05 13:52:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:11,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:11,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:11,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 13:52:11,541 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:11,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1977800140, now seen corresponding path program 70 times [2021-06-05 13:52:11,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:11,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828884596] [2021-06-05 13:52:11,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:11,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:11,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828884596] [2021-06-05 13:52:11,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828884596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075833178] [2021-06-05 13:52:11,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:11,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:11,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:11,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:11,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:11,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075833178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:11,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:11,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:11,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943885939] [2021-06-05 13:52:11,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:11,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:11,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:11,770 INFO L87 Difference]: Start difference. First operand 11996 states and 44404 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:12,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:12,038 INFO L93 Difference]: Finished difference Result 12466 states and 45766 transitions. [2021-06-05 13:52:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:12,063 INFO L225 Difference]: With dead ends: 12466 [2021-06-05 13:52:12,063 INFO L226 Difference]: Without dead ends: 12395 [2021-06-05 13:52:12,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:12,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12395 states. [2021-06-05 13:52:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12395 to 12062. [2021-06-05 13:52:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12062 states, 12061 states have (on average 3.7025951413647293) internal successors, (44657), 12061 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12062 states to 12062 states and 44657 transitions. [2021-06-05 13:52:12,304 INFO L78 Accepts]: Start accepts. Automaton has 12062 states and 44657 transitions. Word has length 27 [2021-06-05 13:52:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:12,304 INFO L482 AbstractCegarLoop]: Abstraction has 12062 states and 44657 transitions. [2021-06-05 13:52:12,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 12062 states and 44657 transitions. [2021-06-05 13:52:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:12,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:12,321 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:12,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 13:52:12,522 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:12,522 INFO L82 PathProgramCache]: Analyzing trace with hash -387127492, now seen corresponding path program 71 times [2021-06-05 13:52:12,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:12,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658104974] [2021-06-05 13:52:12,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:12,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:12,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658104974] [2021-06-05 13:52:12,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658104974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:12,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523723818] [2021-06-05 13:52:12,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:12,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:52:12,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:12,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:12,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:12,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523723818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:12,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:12,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:12,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589497736] [2021-06-05 13:52:12,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:12,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:12,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:12,780 INFO L87 Difference]: Start difference. First operand 12062 states and 44657 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:12,975 INFO L93 Difference]: Finished difference Result 12451 states and 45748 transitions. [2021-06-05 13:52:12,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:12,975 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:12,999 INFO L225 Difference]: With dead ends: 12451 [2021-06-05 13:52:12,999 INFO L226 Difference]: Without dead ends: 12413 [2021-06-05 13:52:12,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2021-06-05 13:52:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 12104. [2021-06-05 13:52:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.702883582582831) internal successors, (44816), 12103 states have internal predecessors, (44816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 44816 transitions. [2021-06-05 13:52:13,184 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 44816 transitions. Word has length 27 [2021-06-05 13:52:13,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:13,184 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 44816 transitions. [2021-06-05 13:52:13,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:13,184 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 44816 transitions. [2021-06-05 13:52:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:13,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:13,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:13,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:13,402 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:13,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1978137212, now seen corresponding path program 72 times [2021-06-05 13:52:13,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:13,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728366761] [2021-06-05 13:52:13,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:13,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:13,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728366761] [2021-06-05 13:52:13,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728366761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:13,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199568270] [2021-06-05 13:52:13,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:13,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:52:13,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:13,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:13,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199568270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:13,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:13,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:13,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408064502] [2021-06-05 13:52:13,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:13,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:13,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:13,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:13,617 INFO L87 Difference]: Start difference. First operand 12104 states and 44816 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:13,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:13,865 INFO L93 Difference]: Finished difference Result 12499 states and 45950 transitions. [2021-06-05 13:52:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:13,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:13,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:13,888 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 13:52:13,888 INFO L226 Difference]: Without dead ends: 12469 [2021-06-05 13:52:13,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:13,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2021-06-05 13:52:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 12148. [2021-06-05 13:52:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12148 states, 12147 states have (on average 3.7034658763480697) internal successors, (44986), 12147 states have internal predecessors, (44986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 44986 transitions. [2021-06-05 13:52:14,077 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 44986 transitions. Word has length 27 [2021-06-05 13:52:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:14,077 INFO L482 AbstractCegarLoop]: Abstraction has 12148 states and 44986 transitions. [2021-06-05 13:52:14,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 44986 transitions. [2021-06-05 13:52:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:14,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:14,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:14,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:14,296 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:14,296 INFO L82 PathProgramCache]: Analyzing trace with hash -4216000, now seen corresponding path program 73 times [2021-06-05 13:52:14,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:14,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818060022] [2021-06-05 13:52:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:14,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818060022] [2021-06-05 13:52:14,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818060022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:14,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193982656] [2021-06-05 13:52:14,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:14,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:14,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193982656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:14,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:14,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:14,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316678963] [2021-06-05 13:52:14,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:14,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:14,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:14,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:14,527 INFO L87 Difference]: Start difference. First operand 12148 states and 44986 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:14,758 INFO L93 Difference]: Finished difference Result 12648 states and 46358 transitions. [2021-06-05 13:52:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:14,783 INFO L225 Difference]: With dead ends: 12648 [2021-06-05 13:52:14,784 INFO L226 Difference]: Without dead ends: 12604 [2021-06-05 13:52:14,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:14,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12604 states. [2021-06-05 13:52:14,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 12166. [2021-06-05 13:52:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.705219893136046) internal successors, (45074), 12165 states have internal predecessors, (45074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 45074 transitions. [2021-06-05 13:52:14,988 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 45074 transitions. Word has length 27 [2021-06-05 13:52:14,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:14,989 INFO L482 AbstractCegarLoop]: Abstraction has 12166 states and 45074 transitions. [2021-06-05 13:52:14,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 45074 transitions. [2021-06-05 13:52:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:15,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:15,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:15,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:15,208 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:15,208 INFO L82 PathProgramCache]: Analyzing trace with hash 903412800, now seen corresponding path program 74 times [2021-06-05 13:52:15,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:15,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433775415] [2021-06-05 13:52:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:15,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:15,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433775415] [2021-06-05 13:52:15,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433775415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:15,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91756174] [2021-06-05 13:52:15,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:15,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:15,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:15,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:15,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91756174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:15,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:15,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 13:52:15,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047886713] [2021-06-05 13:52:15,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 13:52:15,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:15,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 13:52:15,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:15,429 INFO L87 Difference]: Start difference. First operand 12166 states and 45074 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:15,678 INFO L93 Difference]: Finished difference Result 12571 states and 46145 transitions. [2021-06-05 13:52:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:15,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:15,704 INFO L225 Difference]: With dead ends: 12571 [2021-06-05 13:52:15,705 INFO L226 Difference]: Without dead ends: 12515 [2021-06-05 13:52:15,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 13:52:15,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12515 states. [2021-06-05 13:52:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12515 to 12209. [2021-06-05 13:52:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12208 states have (on average 3.705848623853211) internal successors, (45241), 12208 states have internal predecessors, (45241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 45241 transitions. [2021-06-05 13:52:15,985 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 45241 transitions. Word has length 27 [2021-06-05 13:52:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:15,985 INFO L482 AbstractCegarLoop]: Abstraction has 12209 states and 45241 transitions. [2021-06-05 13:52:15,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 45241 transitions. [2021-06-05 13:52:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:16,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:16,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:16,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:16,204 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -995116224, now seen corresponding path program 75 times [2021-06-05 13:52:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:16,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119808643] [2021-06-05 13:52:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:16,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119808643] [2021-06-05 13:52:16,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119808643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303275414] [2021-06-05 13:52:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:16,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:52:16,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:16,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:16,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:16,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303275414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:16,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:16,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:16,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883390146] [2021-06-05 13:52:16,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:16,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:16,450 INFO L87 Difference]: Start difference. First operand 12209 states and 45241 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:16,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:16,771 INFO L93 Difference]: Finished difference Result 12816 states and 46949 transitions. [2021-06-05 13:52:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:16,772 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:16,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:16,798 INFO L225 Difference]: With dead ends: 12816 [2021-06-05 13:52:16,798 INFO L226 Difference]: Without dead ends: 12786 [2021-06-05 13:52:16,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12786 states. [2021-06-05 13:52:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12786 to 12267. [2021-06-05 13:52:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 12266 states have (on average 3.7053644219794553) internal successors, (45450), 12266 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 45450 transitions. [2021-06-05 13:52:17,022 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 45450 transitions. Word has length 27 [2021-06-05 13:52:17,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:17,022 INFO L482 AbstractCegarLoop]: Abstraction has 12267 states and 45450 transitions. [2021-06-05 13:52:17,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:17,023 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 45450 transitions. [2021-06-05 13:52:17,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:17,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:17,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:17,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 13:52:17,240 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:17,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:17,240 INFO L82 PathProgramCache]: Analyzing trace with hash -527717368, now seen corresponding path program 76 times [2021-06-05 13:52:17,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:17,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364090413] [2021-06-05 13:52:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:17,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364090413] [2021-06-05 13:52:17,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364090413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811640348] [2021-06-05 13:52:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:17,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:17,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811640348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:17,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:17,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983667990] [2021-06-05 13:52:17,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:17,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:17,497 INFO L87 Difference]: Start difference. First operand 12267 states and 45450 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:17,774 INFO L93 Difference]: Finished difference Result 12669 states and 46586 transitions. [2021-06-05 13:52:17,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:17,774 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:17,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:17,802 INFO L225 Difference]: With dead ends: 12669 [2021-06-05 13:52:17,802 INFO L226 Difference]: Without dead ends: 12631 [2021-06-05 13:52:17,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-06-05 13:52:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12291. [2021-06-05 13:52:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12291 states, 12290 states have (on average 3.7069975589910498) internal successors, (45559), 12290 states have internal predecessors, (45559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 45559 transitions. [2021-06-05 13:52:18,009 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 45559 transitions. Word has length 27 [2021-06-05 13:52:18,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:18,009 INFO L482 AbstractCegarLoop]: Abstraction has 12291 states and 45559 transitions. [2021-06-05 13:52:18,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 45559 transitions. [2021-06-05 13:52:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:18,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:18,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:18,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:18,228 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:18,228 INFO L82 PathProgramCache]: Analyzing trace with hash -20110840, now seen corresponding path program 77 times [2021-06-05 13:52:18,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:18,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185208930] [2021-06-05 13:52:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:18,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:18,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:18,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185208930] [2021-06-05 13:52:18,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185208930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:18,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327151667] [2021-06-05 13:52:18,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:18,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:52:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:18,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:18,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:18,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:18,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327151667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:18,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:18,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:18,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683112370] [2021-06-05 13:52:18,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:18,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:18,467 INFO L87 Difference]: Start difference. First operand 12291 states and 45559 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:18,810 INFO L93 Difference]: Finished difference Result 12456 states and 46048 transitions. [2021-06-05 13:52:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:52:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:18,836 INFO L225 Difference]: With dead ends: 12456 [2021-06-05 13:52:18,837 INFO L226 Difference]: Without dead ends: 12441 [2021-06-05 13:52:18,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:52:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12441 states. [2021-06-05 13:52:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12441 to 12288. [2021-06-05 13:52:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12288 states, 12287 states have (on average 3.7083909823390577) internal successors, (45565), 12287 states have internal predecessors, (45565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12288 states to 12288 states and 45565 transitions. [2021-06-05 13:52:19,032 INFO L78 Accepts]: Start accepts. Automaton has 12288 states and 45565 transitions. Word has length 27 [2021-06-05 13:52:19,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:19,032 INFO L482 AbstractCegarLoop]: Abstraction has 12288 states and 45565 transitions. [2021-06-05 13:52:19,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:19,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12288 states and 45565 transitions. [2021-06-05 13:52:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:19,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:19,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:19,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:19,262 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1507837696, now seen corresponding path program 78 times [2021-06-05 13:52:19,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:19,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304876737] [2021-06-05 13:52:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:19,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:19,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304876737] [2021-06-05 13:52:19,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304876737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:19,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958015736] [2021-06-05 13:52:19,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:19,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:52:19,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:19,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958015736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:19,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:19,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:19,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966064603] [2021-06-05 13:52:19,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:19,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:19,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:19,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:19,519 INFO L87 Difference]: Start difference. First operand 12288 states and 45565 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:19,779 INFO L93 Difference]: Finished difference Result 12934 states and 47416 transitions. [2021-06-05 13:52:19,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:19,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:19,804 INFO L225 Difference]: With dead ends: 12934 [2021-06-05 13:52:19,804 INFO L226 Difference]: Without dead ends: 12890 [2021-06-05 13:52:19,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-06-05 13:52:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12354. [2021-06-05 13:52:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.7074394883833888) internal successors, (45798), 12353 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:20,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 45798 transitions. [2021-06-05 13:52:20,012 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 45798 transitions. Word has length 27 [2021-06-05 13:52:20,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:20,012 INFO L482 AbstractCegarLoop]: Abstraction has 12354 states and 45798 transitions. [2021-06-05 13:52:20,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:20,012 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 45798 transitions. [2021-06-05 13:52:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:20,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:20,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:20,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:20,233 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:20,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1631076228, now seen corresponding path program 79 times [2021-06-05 13:52:20,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:20,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839289339] [2021-06-05 13:52:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:20,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:20,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839289339] [2021-06-05 13:52:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839289339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617705291] [2021-06-05 13:52:20,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:20,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:20,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617705291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:20,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:20,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77905202] [2021-06-05 13:52:20,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:20,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:20,538 INFO L87 Difference]: Start difference. First operand 12354 states and 45798 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:20,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:20,759 INFO L93 Difference]: Finished difference Result 12785 states and 46949 transitions. [2021-06-05 13:52:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:20,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:20,788 INFO L225 Difference]: With dead ends: 12785 [2021-06-05 13:52:20,788 INFO L226 Difference]: Without dead ends: 12687 [2021-06-05 13:52:20,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12687 states. [2021-06-05 13:52:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12687 to 12380. [2021-06-05 13:52:20,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12380 states, 12379 states have (on average 3.7087002181113173) internal successors, (45910), 12379 states have internal predecessors, (45910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 45910 transitions. [2021-06-05 13:52:21,006 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 45910 transitions. Word has length 27 [2021-06-05 13:52:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:21,006 INFO L482 AbstractCegarLoop]: Abstraction has 12380 states and 45910 transitions. [2021-06-05 13:52:21,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 45910 transitions. [2021-06-05 13:52:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:21,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:21,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:21,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:21,225 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:21,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:21,226 INFO L82 PathProgramCache]: Analyzing trace with hash -179350336, now seen corresponding path program 80 times [2021-06-05 13:52:21,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:21,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449335794] [2021-06-05 13:52:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:21,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449335794] [2021-06-05 13:52:21,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449335794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:21,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820347905] [2021-06-05 13:52:21,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:21,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:21,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:21,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:21,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:21,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820347905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:21,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:21,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:21,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675550447] [2021-06-05 13:52:21,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:21,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:21,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:21,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:21,477 INFO L87 Difference]: Start difference. First operand 12380 states and 45910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:21,744 INFO L93 Difference]: Finished difference Result 12574 states and 46469 transitions. [2021-06-05 13:52:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:52:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:21,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:21,772 INFO L225 Difference]: With dead ends: 12574 [2021-06-05 13:52:21,772 INFO L226 Difference]: Without dead ends: 12552 [2021-06-05 13:52:21,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:52:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12552 states. [2021-06-05 13:52:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12552 to 12373. [2021-06-05 13:52:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12373 states, 12372 states have (on average 3.7103136113805366) internal successors, (45904), 12372 states have internal predecessors, (45904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 45904 transitions. [2021-06-05 13:52:21,975 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 45904 transitions. Word has length 27 [2021-06-05 13:52:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:21,975 INFO L482 AbstractCegarLoop]: Abstraction has 12373 states and 45904 transitions. [2021-06-05 13:52:21,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 45904 transitions. [2021-06-05 13:52:21,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:21,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:21,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:22,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 13:52:22,194 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 887736380, now seen corresponding path program 81 times [2021-06-05 13:52:22,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:22,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167021995] [2021-06-05 13:52:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:22,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:22,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167021995] [2021-06-05 13:52:22,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167021995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:22,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058554913] [2021-06-05 13:52:22,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:22,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 13:52:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:22,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:22,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:22,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058554913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:22,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:22,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:22,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660565491] [2021-06-05 13:52:22,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:22,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:22,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:22,442 INFO L87 Difference]: Start difference. First operand 12373 states and 45904 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:22,767 INFO L93 Difference]: Finished difference Result 13084 states and 47922 transitions. [2021-06-05 13:52:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:22,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:22,793 INFO L225 Difference]: With dead ends: 13084 [2021-06-05 13:52:22,793 INFO L226 Difference]: Without dead ends: 13054 [2021-06-05 13:52:22,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2021-06-05 13:52:22,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 12469. [2021-06-05 13:52:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12469 states, 12468 states have (on average 3.7080526146936155) internal successors, (46232), 12468 states have internal predecessors, (46232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:23,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12469 states to 12469 states and 46232 transitions. [2021-06-05 13:52:23,002 INFO L78 Accepts]: Start accepts. Automaton has 12469 states and 46232 transitions. Word has length 27 [2021-06-05 13:52:23,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:23,002 INFO L482 AbstractCegarLoop]: Abstraction has 12469 states and 46232 transitions. [2021-06-05 13:52:23,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand 12469 states and 46232 transitions. [2021-06-05 13:52:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:23,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:23,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:23,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 13:52:23,222 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:23,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1977991744, now seen corresponding path program 82 times [2021-06-05 13:52:23,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:23,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958379812] [2021-06-05 13:52:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:23,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:23,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958379812] [2021-06-05 13:52:23,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958379812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:23,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037625344] [2021-06-05 13:52:23,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:23,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:23,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:23,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:23,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:23,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:23,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037625344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:23,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:23,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:23,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595131295] [2021-06-05 13:52:23,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:23,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:23,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:23,438 INFO L87 Difference]: Start difference. First operand 12469 states and 46232 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:23,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:23,657 INFO L93 Difference]: Finished difference Result 12896 states and 47434 transitions. [2021-06-05 13:52:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:23,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:23,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:23,688 INFO L225 Difference]: With dead ends: 12896 [2021-06-05 13:52:23,688 INFO L226 Difference]: Without dead ends: 12812 [2021-06-05 13:52:23,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-06-05 13:52:23,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 12548. [2021-06-05 13:52:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12547 states have (on average 3.7084562046704392) internal successors, (46530), 12547 states have internal predecessors, (46530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:23,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 46530 transitions. [2021-06-05 13:52:23,899 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 46530 transitions. Word has length 27 [2021-06-05 13:52:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:23,899 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 46530 transitions. [2021-06-05 13:52:23,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:23,899 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 46530 transitions. [2021-06-05 13:52:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:23,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:23,918 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:24,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:24,119 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187844, now seen corresponding path program 83 times [2021-06-05 13:52:24,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:24,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600030377] [2021-06-05 13:52:24,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:24,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:24,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600030377] [2021-06-05 13:52:24,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600030377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:24,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828165526] [2021-06-05 13:52:24,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:24,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:52:24,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:24,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:24,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:24,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828165526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:24,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:24,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:24,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063830616] [2021-06-05 13:52:24,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:24,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:24,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:24,387 INFO L87 Difference]: Start difference. First operand 12548 states and 46530 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:24,696 INFO L93 Difference]: Finished difference Result 12969 states and 47738 transitions. [2021-06-05 13:52:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:24,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:24,832 INFO L225 Difference]: With dead ends: 12969 [2021-06-05 13:52:24,832 INFO L226 Difference]: Without dead ends: 12939 [2021-06-05 13:52:24,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2021-06-05 13:52:24,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12565. [2021-06-05 13:52:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 3.7117160140082777) internal successors, (46634), 12564 states have internal predecessors, (46634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 46634 transitions. [2021-06-05 13:52:25,047 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 46634 transitions. Word has length 27 [2021-06-05 13:52:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:25,047 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 46634 transitions. [2021-06-05 13:52:25,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 46634 transitions. [2021-06-05 13:52:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:25,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:25,067 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:25,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:25,268 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:25,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1958802428, now seen corresponding path program 84 times [2021-06-05 13:52:25,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:25,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146557121] [2021-06-05 13:52:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:25,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146557121] [2021-06-05 13:52:25,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146557121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:25,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818906568] [2021-06-05 13:52:25,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:25,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 13:52:25,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:25,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:25,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:25,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818906568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:25,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:25,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:25,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831106922] [2021-06-05 13:52:25,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:25,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:25,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:25,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:25,507 INFO L87 Difference]: Start difference. First operand 12565 states and 46634 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:25,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:25,759 INFO L93 Difference]: Finished difference Result 13017 states and 47934 transitions. [2021-06-05 13:52:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:25,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:25,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:25,784 INFO L225 Difference]: With dead ends: 13017 [2021-06-05 13:52:25,785 INFO L226 Difference]: Without dead ends: 12987 [2021-06-05 13:52:25,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 194.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:25,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-06-05 13:52:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12637. [2021-06-05 13:52:25,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 3.7109844887622665) internal successors, (46892), 12636 states have internal predecessors, (46892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 46892 transitions. [2021-06-05 13:52:25,989 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 46892 transitions. Word has length 27 [2021-06-05 13:52:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:25,989 INFO L482 AbstractCegarLoop]: Abstraction has 12637 states and 46892 transitions. [2021-06-05 13:52:25,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 46892 transitions. [2021-06-05 13:52:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:26,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:26,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:26,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:26,210 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:26,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1037014720, now seen corresponding path program 85 times [2021-06-05 13:52:26,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:26,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484462269] [2021-06-05 13:52:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:26,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:26,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484462269] [2021-06-05 13:52:26,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484462269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:26,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772727345] [2021-06-05 13:52:26,272 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:26,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:26,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:26,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772727345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:26,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:26,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:26,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263135500] [2021-06-05 13:52:26,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:26,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:26,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:26,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:26,431 INFO L87 Difference]: Start difference. First operand 12637 states and 46892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:26,727 INFO L93 Difference]: Finished difference Result 13031 states and 47962 transitions. [2021-06-05 13:52:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:52:26,728 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:26,755 INFO L225 Difference]: With dead ends: 13031 [2021-06-05 13:52:26,755 INFO L226 Difference]: Without dead ends: 12951 [2021-06-05 13:52:26,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 13:52:26,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2021-06-05 13:52:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 12663. [2021-06-05 13:52:26,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12663 states, 12662 states have (on average 3.7132364555362503) internal successors, (47017), 12662 states have internal predecessors, (47017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12663 states to 12663 states and 47017 transitions. [2021-06-05 13:52:26,981 INFO L78 Accepts]: Start accepts. Automaton has 12663 states and 47017 transitions. Word has length 27 [2021-06-05 13:52:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:26,981 INFO L482 AbstractCegarLoop]: Abstraction has 12663 states and 47017 transitions. [2021-06-05 13:52:26,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 12663 states and 47017 transitions. [2021-06-05 13:52:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 13:52:27,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:27,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:27,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:27,201 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:27,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1052109376, now seen corresponding path program 86 times [2021-06-05 13:52:27,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:27,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124249279] [2021-06-05 13:52:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:27,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:27,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124249279] [2021-06-05 13:52:27,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124249279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:27,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492285993] [2021-06-05 13:52:27,266 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:27,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:27,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:27,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 13:52:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:52:27,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492285993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:27,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:27,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 13:52:27,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255843151] [2021-06-05 13:52:27,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 13:52:27,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 13:52:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 13:52:27,513 INFO L87 Difference]: Start difference. First operand 12663 states and 47017 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:27,883 INFO L93 Difference]: Finished difference Result 12828 states and 47506 transitions. [2021-06-05 13:52:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:52:27,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 13:52:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:27,911 INFO L225 Difference]: With dead ends: 12828 [2021-06-05 13:52:27,912 INFO L226 Difference]: Without dead ends: 12813 [2021-06-05 13:52:27,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 13:52:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2021-06-05 13:52:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 12651. [2021-06-05 13:52:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.714229249011858) internal successors, (46985), 12650 states have internal predecessors, (46985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:28,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 46985 transitions. [2021-06-05 13:52:28,125 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 46985 transitions. Word has length 27 [2021-06-05 13:52:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:28,126 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 46985 transitions. [2021-06-05 13:52:28,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 46985 transitions. [2021-06-05 13:52:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:28,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:28,146 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:28,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:28,347 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1489264556, now seen corresponding path program 87 times [2021-06-05 13:52:28,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:28,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435780234] [2021-06-05 13:52:28,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:28,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:28,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435780234] [2021-06-05 13:52:28,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435780234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:28,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985358513] [2021-06-05 13:52:28,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:28,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:52:28,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:28,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:28,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:28,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985358513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:28,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:28,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:52:28,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393066309] [2021-06-05 13:52:28,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:28,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:28,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:28,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:28,479 INFO L87 Difference]: Start difference. First operand 12651 states and 46985 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:29,015 INFO L93 Difference]: Finished difference Result 22245 states and 78518 transitions. [2021-06-05 13:52:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 13:52:29,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:29,058 INFO L225 Difference]: With dead ends: 22245 [2021-06-05 13:52:29,058 INFO L226 Difference]: Without dead ends: 22157 [2021-06-05 13:52:29,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 13:52:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22157 states. [2021-06-05 13:52:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22157 to 13996. [2021-06-05 13:52:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13996 states, 13995 states have (on average 3.697463379778492) internal successors, (51746), 13995 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13996 states to 13996 states and 51746 transitions. [2021-06-05 13:52:29,398 INFO L78 Accepts]: Start accepts. Automaton has 13996 states and 51746 transitions. Word has length 29 [2021-06-05 13:52:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:29,398 INFO L482 AbstractCegarLoop]: Abstraction has 13996 states and 51746 transitions. [2021-06-05 13:52:29,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 13996 states and 51746 transitions. [2021-06-05 13:52:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:29,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:29,421 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:29,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:29,621 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:29,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1582018668, now seen corresponding path program 88 times [2021-06-05 13:52:29,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:29,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000619567] [2021-06-05 13:52:29,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:29,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000619567] [2021-06-05 13:52:29,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000619567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964165557] [2021-06-05 13:52:29,659 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:29,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:29,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:29,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:29,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:29,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964165557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:29,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:29,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 13:52:29,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311761283] [2021-06-05 13:52:29,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:52:29,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:29,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:52:29,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:52:29,742 INFO L87 Difference]: Start difference. First operand 13996 states and 51746 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:29,957 INFO L93 Difference]: Finished difference Result 20503 states and 74398 transitions. [2021-06-05 13:52:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:29,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:29,996 INFO L225 Difference]: With dead ends: 20503 [2021-06-05 13:52:29,996 INFO L226 Difference]: Without dead ends: 20406 [2021-06-05 13:52:29,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:52:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2021-06-05 13:52:30,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 17863. [2021-06-05 13:52:30,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.743141865412608) internal successors, (66860), 17862 states have internal predecessors, (66860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 66860 transitions. [2021-06-05 13:52:30,320 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 66860 transitions. Word has length 29 [2021-06-05 13:52:30,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:30,320 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 66860 transitions. [2021-06-05 13:52:30,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:30,320 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 66860 transitions. [2021-06-05 13:52:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:30,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:30,347 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:30,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:30,547 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:30,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1828893528, now seen corresponding path program 89 times [2021-06-05 13:52:30,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:30,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964402812] [2021-06-05 13:52:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:30,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:30,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964402812] [2021-06-05 13:52:30,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964402812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:30,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216007104] [2021-06-05 13:52:30,577 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:30,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:52:30,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:30,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:30,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216007104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:30,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:30,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 13:52:30,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886783386] [2021-06-05 13:52:30,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:52:30,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:52:30,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:52:30,653 INFO L87 Difference]: Start difference. First operand 17863 states and 66860 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 13:52:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:31,298 INFO L93 Difference]: Finished difference Result 41463 states and 150404 transitions. [2021-06-05 13:52:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 13:52:31,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 29 [2021-06-05 13:52:31,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:31,393 INFO L225 Difference]: With dead ends: 41463 [2021-06-05 13:52:31,394 INFO L226 Difference]: Without dead ends: 40731 [2021-06-05 13:52:31,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 13:52:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40731 states. [2021-06-05 13:52:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40731 to 28028. [2021-06-05 13:52:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28028 states, 28027 states have (on average 3.774895636350662) internal successors, (105799), 28027 states have internal predecessors, (105799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28028 states to 28028 states and 105799 transitions. [2021-06-05 13:52:32,115 INFO L78 Accepts]: Start accepts. Automaton has 28028 states and 105799 transitions. Word has length 29 [2021-06-05 13:52:32,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:32,115 INFO L482 AbstractCegarLoop]: Abstraction has 28028 states and 105799 transitions. [2021-06-05 13:52:32,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 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 13:52:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28028 states and 105799 transitions. [2021-06-05 13:52:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:32,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:32,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:32,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 13:52:32,362 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:32,362 INFO L82 PathProgramCache]: Analyzing trace with hash 904383528, now seen corresponding path program 90 times [2021-06-05 13:52:32,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:32,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447301083] [2021-06-05 13:52:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:32,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447301083] [2021-06-05 13:52:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447301083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738934798] [2021-06-05 13:52:32,396 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:32,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:52:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:32,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:32,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738934798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:32,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:32,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:52:32,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131761708] [2021-06-05 13:52:32,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:52:32,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:32,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:52:32,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:52:32,652 INFO L87 Difference]: Start difference. First operand 28028 states and 105799 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:33,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:33,619 INFO L93 Difference]: Finished difference Result 54693 states and 194613 transitions. [2021-06-05 13:52:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 13:52:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:33,755 INFO L225 Difference]: With dead ends: 54693 [2021-06-05 13:52:33,755 INFO L226 Difference]: Without dead ends: 54103 [2021-06-05 13:52:33,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=805, Invalid=2855, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:52:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54103 states. [2021-06-05 13:52:34,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54103 to 31277. [2021-06-05 13:52:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 3.7364432791917124) internal successors, (116861), 31276 states have internal predecessors, (116861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 116861 transitions. [2021-06-05 13:52:34,581 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 116861 transitions. Word has length 29 [2021-06-05 13:52:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:34,581 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 116861 transitions. [2021-06-05 13:52:34,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 116861 transitions. [2021-06-05 13:52:34,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:34,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:34,630 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:34,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:34,831 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:34,831 INFO L82 PathProgramCache]: Analyzing trace with hash 816620900, now seen corresponding path program 91 times [2021-06-05 13:52:34,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:34,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617497110] [2021-06-05 13:52:34,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:34,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:34,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617497110] [2021-06-05 13:52:34,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617497110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:34,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814142018] [2021-06-05 13:52:34,864 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:34,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:34,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:34,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814142018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:34,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:34,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-06-05 13:52:34,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205357507] [2021-06-05 13:52:34,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:52:34,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:52:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:52:34,927 INFO L87 Difference]: Start difference. First operand 31277 states and 116861 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:35,211 INFO L93 Difference]: Finished difference Result 41400 states and 152146 transitions. [2021-06-05 13:52:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:52:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:35,306 INFO L225 Difference]: With dead ends: 41400 [2021-06-05 13:52:35,306 INFO L226 Difference]: Without dead ends: 41184 [2021-06-05 13:52:35,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:52:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41184 states. [2021-06-05 13:52:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41184 to 36746. [2021-06-05 13:52:36,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36746 states, 36745 states have (on average 3.781221934957137) internal successors, (138941), 36745 states have internal predecessors, (138941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36746 states to 36746 states and 138941 transitions. [2021-06-05 13:52:36,221 INFO L78 Accepts]: Start accepts. Automaton has 36746 states and 138941 transitions. Word has length 29 [2021-06-05 13:52:36,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:36,221 INFO L482 AbstractCegarLoop]: Abstraction has 36746 states and 138941 transitions. [2021-06-05 13:52:36,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 36746 states and 138941 transitions. [2021-06-05 13:52:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:36,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:36,283 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:36,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 13:52:36,484 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:36,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1324656412, now seen corresponding path program 92 times [2021-06-05 13:52:36,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:36,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122279873] [2021-06-05 13:52:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:36,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:36,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:36,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122279873] [2021-06-05 13:52:36,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122279873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:36,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562296728] [2021-06-05 13:52:36,506 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:36,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:52:36,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562296728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:36,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:36,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:52:36,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654012127] [2021-06-05 13:52:36,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:52:36,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:36,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:52:36,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:52:36,589 INFO L87 Difference]: Start difference. First operand 36746 states and 138941 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:37,589 INFO L93 Difference]: Finished difference Result 60231 states and 218468 transitions. [2021-06-05 13:52:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 13:52:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:37,764 INFO L225 Difference]: With dead ends: 60231 [2021-06-05 13:52:37,764 INFO L226 Difference]: Without dead ends: 59842 [2021-06-05 13:52:37,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:52:37,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59842 states. [2021-06-05 13:52:39,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59842 to 45321. [2021-06-05 13:52:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 3.791306266548985) internal successors, (171822), 45320 states have internal predecessors, (171822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 171822 transitions. [2021-06-05 13:52:39,487 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 171822 transitions. Word has length 29 [2021-06-05 13:52:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:39,487 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 171822 transitions. [2021-06-05 13:52:39,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 171822 transitions. [2021-06-05 13:52:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:39,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:39,555 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:39,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:39,756 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:39,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1852635552, now seen corresponding path program 93 times [2021-06-05 13:52:39,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:39,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206807573] [2021-06-05 13:52:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:39,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206807573] [2021-06-05 13:52:39,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206807573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:39,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203499733] [2021-06-05 13:52:39,778 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:39,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:52:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:52:40,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203499733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:40,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:40,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:52:40,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160515691] [2021-06-05 13:52:40,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:52:40,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:40,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:52:40,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:52:40,002 INFO L87 Difference]: Start difference. First operand 45321 states and 171822 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:41,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:41,145 INFO L93 Difference]: Finished difference Result 61448 states and 220290 transitions. [2021-06-05 13:52:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 13:52:41,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:41,322 INFO L225 Difference]: With dead ends: 61448 [2021-06-05 13:52:41,322 INFO L226 Difference]: Without dead ends: 61268 [2021-06-05 13:52:41,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 13:52:41,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61268 states. [2021-06-05 13:52:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61268 to 46515. [2021-06-05 13:52:42,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46515 states, 46514 states have (on average 3.783893021455906) internal successors, (176004), 46514 states have internal predecessors, (176004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:42,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46515 states to 46515 states and 176004 transitions. [2021-06-05 13:52:42,782 INFO L78 Accepts]: Start accepts. Automaton has 46515 states and 176004 transitions. Word has length 29 [2021-06-05 13:52:42,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:42,782 INFO L482 AbstractCegarLoop]: Abstraction has 46515 states and 176004 transitions. [2021-06-05 13:52:42,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:42,782 INFO L276 IsEmpty]: Start isEmpty. Operand 46515 states and 176004 transitions. [2021-06-05 13:52:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:42,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:42,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:43,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 13:52:43,048 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash -505873000, now seen corresponding path program 94 times [2021-06-05 13:52:43,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:43,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853734858] [2021-06-05 13:52:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:43,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:43,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853734858] [2021-06-05 13:52:43,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853734858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:43,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299218405] [2021-06-05 13:52:43,067 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:43,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:52:43,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:52:43,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299218405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:43,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:43,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:52:43,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470074842] [2021-06-05 13:52:43,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:52:43,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:52:43,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:52:43,143 INFO L87 Difference]: Start difference. First operand 46515 states and 176004 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 13:52:43,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:43,772 INFO L93 Difference]: Finished difference Result 58737 states and 220575 transitions. [2021-06-05 13:52:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:52:43,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 29 [2021-06-05 13:52:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:43,939 INFO L225 Difference]: With dead ends: 58737 [2021-06-05 13:52:43,939 INFO L226 Difference]: Without dead ends: 58715 [2021-06-05 13:52:43,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:52:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58715 states. [2021-06-05 13:52:45,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58715 to 54562. [2021-06-05 13:52:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54562 states, 54561 states have (on average 3.806143582412346) internal successors, (207667), 54561 states have internal predecessors, (207667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54562 states to 54562 states and 207667 transitions. [2021-06-05 13:52:45,501 INFO L78 Accepts]: Start accepts. Automaton has 54562 states and 207667 transitions. Word has length 29 [2021-06-05 13:52:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:45,502 INFO L482 AbstractCegarLoop]: Abstraction has 54562 states and 207667 transitions. [2021-06-05 13:52:45,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 13:52:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 54562 states and 207667 transitions. [2021-06-05 13:52:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:45,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:45,577 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:45,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 13:52:45,778 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:45,778 INFO L82 PathProgramCache]: Analyzing trace with hash -2054404452, now seen corresponding path program 95 times [2021-06-05 13:52:45,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:45,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802343510] [2021-06-05 13:52:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:52:45,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:45,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802343510] [2021-06-05 13:52:45,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802343510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:45,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892856585] [2021-06-05 13:52:45,806 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:45,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:52:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:45,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:45,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892856585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:45,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:45,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:52:45,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832525156] [2021-06-05 13:52:45,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:52:45,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:45,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:52:45,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:52:45,883 INFO L87 Difference]: Start difference. First operand 54562 states and 207667 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:46,321 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-05 13:52:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:47,444 INFO L93 Difference]: Finished difference Result 79748 states and 284600 transitions. [2021-06-05 13:52:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 13:52:47,444 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:47,903 INFO L225 Difference]: With dead ends: 79748 [2021-06-05 13:52:47,903 INFO L226 Difference]: Without dead ends: 79619 [2021-06-05 13:52:47,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 887.9ms TimeCoverageRelationStatistics Valid=1227, Invalid=5093, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 13:52:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79619 states. [2021-06-05 13:52:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79619 to 55774. [2021-06-05 13:52:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55774 states, 55773 states have (on average 3.7706954978215266) internal successors, (210303), 55773 states have internal predecessors, (210303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55774 states to 55774 states and 210303 transitions. [2021-06-05 13:52:49,658 INFO L78 Accepts]: Start accepts. Automaton has 55774 states and 210303 transitions. Word has length 29 [2021-06-05 13:52:49,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:49,658 INFO L482 AbstractCegarLoop]: Abstraction has 55774 states and 210303 transitions. [2021-06-05 13:52:49,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 55774 states and 210303 transitions. [2021-06-05 13:52:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:49,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:49,755 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:49,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 13:52:49,956 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:49,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:49,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1716737040, now seen corresponding path program 96 times [2021-06-05 13:52:49,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:49,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965226579] [2021-06-05 13:52:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:49,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:49,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965226579] [2021-06-05 13:52:49,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965226579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:49,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501141796] [2021-06-05 13:52:49,994 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:50,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:52:50,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:50,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:52:50,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501141796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:50,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:50,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2021-06-05 13:52:50,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265705388] [2021-06-05 13:52:50,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:52:50,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:50,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:52:50,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:52:50,079 INFO L87 Difference]: Start difference. First operand 55774 states and 210303 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:50,761 INFO L93 Difference]: Finished difference Result 60437 states and 224551 transitions. [2021-06-05 13:52:50,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:52:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:50,937 INFO L225 Difference]: With dead ends: 60437 [2021-06-05 13:52:50,938 INFO L226 Difference]: Without dead ends: 60405 [2021-06-05 13:52:50,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:52:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60405 states. [2021-06-05 13:52:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60405 to 49962. [2021-06-05 13:52:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49962 states, 49961 states have (on average 3.74323972698705) internal successors, (187016), 49961 states have internal predecessors, (187016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:52,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49962 states to 49962 states and 187016 transitions. [2021-06-05 13:52:52,292 INFO L78 Accepts]: Start accepts. Automaton has 49962 states and 187016 transitions. Word has length 29 [2021-06-05 13:52:52,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:52,293 INFO L482 AbstractCegarLoop]: Abstraction has 49962 states and 187016 transitions. [2021-06-05 13:52:52,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:52,293 INFO L276 IsEmpty]: Start isEmpty. Operand 49962 states and 187016 transitions. [2021-06-05 13:52:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:52,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:52,364 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:52,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:52,572 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1220322522, now seen corresponding path program 97 times [2021-06-05 13:52:52,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:52,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839885485] [2021-06-05 13:52:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:52,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:52:52,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:52,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839885485] [2021-06-05 13:52:52,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839885485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:52,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948112866] [2021-06-05 13:52:52,596 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:52,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:52,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:52:52,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948112866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:52,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:52,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 13:52:52,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578650190] [2021-06-05 13:52:52,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:52:52,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:52:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:52:52,660 INFO L87 Difference]: Start difference. First operand 49962 states and 187016 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:53,346 INFO L93 Difference]: Finished difference Result 60595 states and 223581 transitions. [2021-06-05 13:52:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:52:53,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:53,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:53,516 INFO L225 Difference]: With dead ends: 60595 [2021-06-05 13:52:53,516 INFO L226 Difference]: Without dead ends: 60532 [2021-06-05 13:52:53,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:52:53,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60532 states. [2021-06-05 13:52:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60532 to 55220. [2021-06-05 13:52:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55220 states, 55219 states have (on average 3.765171408392039) internal successors, (207909), 55219 states have internal predecessors, (207909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55220 states to 55220 states and 207909 transitions. [2021-06-05 13:52:54,832 INFO L78 Accepts]: Start accepts. Automaton has 55220 states and 207909 transitions. Word has length 29 [2021-06-05 13:52:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:54,832 INFO L482 AbstractCegarLoop]: Abstraction has 55220 states and 207909 transitions. [2021-06-05 13:52:54,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:54,833 INFO L276 IsEmpty]: Start isEmpty. Operand 55220 states and 207909 transitions. [2021-06-05 13:52:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:55,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:55,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:55,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 13:52:55,450 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:55,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1949620774, now seen corresponding path program 98 times [2021-06-05 13:52:55,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:55,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456698747] [2021-06-05 13:52:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:55,473 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 13:52:55,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:55,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456698747] [2021-06-05 13:52:55,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456698747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:55,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378893926] [2021-06-05 13:52:55,473 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:55,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:52:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:52:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378893926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:55,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:55,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 13:52:55,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432502515] [2021-06-05 13:52:55,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:52:55,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:55,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:52:55,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:52:55,561 INFO L87 Difference]: Start difference. First operand 55220 states and 207909 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:56,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:52:56,615 INFO L93 Difference]: Finished difference Result 66898 states and 242065 transitions. [2021-06-05 13:52:56,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 13:52:56,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:52:56,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:52:56,810 INFO L225 Difference]: With dead ends: 66898 [2021-06-05 13:52:56,810 INFO L226 Difference]: Without dead ends: 66524 [2021-06-05 13:52:56,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 431.6ms TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:52:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66524 states. [2021-06-05 13:52:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66524 to 50787. [2021-06-05 13:52:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50787 states, 50786 states have (on average 3.7521167250817156) internal successors, (190555), 50786 states have internal predecessors, (190555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:58,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50787 states to 50787 states and 190555 transitions. [2021-06-05 13:52:58,458 INFO L78 Accepts]: Start accepts. Automaton has 50787 states and 190555 transitions. Word has length 29 [2021-06-05 13:52:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:52:58,458 INFO L482 AbstractCegarLoop]: Abstraction has 50787 states and 190555 transitions. [2021-06-05 13:52:58,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:52:58,459 INFO L276 IsEmpty]: Start isEmpty. Operand 50787 states and 190555 transitions. [2021-06-05 13:52:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:52:58,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:52:58,536 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:52:58,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:58,737 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:52:58,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:52:58,737 INFO L82 PathProgramCache]: Analyzing trace with hash -315726062, now seen corresponding path program 99 times [2021-06-05 13:52:58,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:52:58,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647760685] [2021-06-05 13:52:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:52:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:52:58,767 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 13:52:58,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:52:58,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647760685] [2021-06-05 13:52:58,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647760685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:58,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627435350] [2021-06-05 13:52:58,767 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:52:58,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:52:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:52:58,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:52:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:52:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:52:58,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627435350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:52:58,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:52:58,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 13:52:58,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629089547] [2021-06-05 13:52:58,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:52:58,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:52:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:52:58,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:52:58,858 INFO L87 Difference]: Start difference. First operand 50787 states and 190555 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:00,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:00,237 INFO L93 Difference]: Finished difference Result 100609 states and 369514 transitions. [2021-06-05 13:53:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 13:53:00,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:00,530 INFO L225 Difference]: With dead ends: 100609 [2021-06-05 13:53:00,530 INFO L226 Difference]: Without dead ends: 100210 [2021-06-05 13:53:00,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 13:53:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100210 states. [2021-06-05 13:53:02,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100210 to 73794. [2021-06-05 13:53:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73794 states, 73793 states have (on average 3.8082744975810714) internal successors, (281024), 73793 states have internal predecessors, (281024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73794 states to 73794 states and 281024 transitions. [2021-06-05 13:53:02,982 INFO L78 Accepts]: Start accepts. Automaton has 73794 states and 281024 transitions. Word has length 29 [2021-06-05 13:53:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:02,983 INFO L482 AbstractCegarLoop]: Abstraction has 73794 states and 281024 transitions. [2021-06-05 13:53:02,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 73794 states and 281024 transitions. [2021-06-05 13:53:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:03,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:03,111 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:03,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 13:53:03,312 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:03,313 INFO L82 PathProgramCache]: Analyzing trace with hash 471519794, now seen corresponding path program 100 times [2021-06-05 13:53:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:03,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510118264] [2021-06-05 13:53:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:03,337 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 13:53:03,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:03,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510118264] [2021-06-05 13:53:03,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510118264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:03,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472526869] [2021-06-05 13:53:03,337 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:03,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:03,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:03,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:53:03,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472526869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:03,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:03,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 13:53:03,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672327003] [2021-06-05 13:53:03,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:53:03,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:03,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:53:03,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:03,418 INFO L87 Difference]: Start difference. First operand 73794 states and 281024 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:05,019 INFO L93 Difference]: Finished difference Result 102298 states and 373018 transitions. [2021-06-05 13:53:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 13:53:05,019 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:05,326 INFO L225 Difference]: With dead ends: 102298 [2021-06-05 13:53:05,326 INFO L226 Difference]: Without dead ends: 101158 [2021-06-05 13:53:05,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 13:53:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101158 states. [2021-06-05 13:53:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101158 to 73287. [2021-06-05 13:53:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73287 states, 73286 states have (on average 3.7827825232650163) internal successors, (277225), 73286 states have internal predecessors, (277225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73287 states to 73287 states and 277225 transitions. [2021-06-05 13:53:07,795 INFO L78 Accepts]: Start accepts. Automaton has 73287 states and 277225 transitions. Word has length 29 [2021-06-05 13:53:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:07,795 INFO L482 AbstractCegarLoop]: Abstraction has 73287 states and 277225 transitions. [2021-06-05 13:53:07,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 73287 states and 277225 transitions. [2021-06-05 13:53:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:07,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:07,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:08,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:08,130 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash 353639198, now seen corresponding path program 101 times [2021-06-05 13:53:08,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:08,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319331400] [2021-06-05 13:53:08,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:08,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:08,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319331400] [2021-06-05 13:53:08,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319331400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:08,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886967642] [2021-06-05 13:53:08,172 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:08,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:53:08,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:08,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:08,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886967642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:08,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:08,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 13:53:08,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479106461] [2021-06-05 13:53:08,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:53:08,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:08,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:53:08,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:08,249 INFO L87 Difference]: Start difference. First operand 73287 states and 277225 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:09,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:09,178 INFO L93 Difference]: Finished difference Result 82707 states and 304326 transitions. [2021-06-05 13:53:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:09,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:09,464 INFO L225 Difference]: With dead ends: 82707 [2021-06-05 13:53:09,464 INFO L226 Difference]: Without dead ends: 82617 [2021-06-05 13:53:09,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:09,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82617 states. [2021-06-05 13:53:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82617 to 73144. [2021-06-05 13:53:10,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 3.754234855010049) internal successors, (274596), 73143 states have internal predecessors, (274596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 274596 transitions. [2021-06-05 13:53:11,237 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 274596 transitions. Word has length 29 [2021-06-05 13:53:11,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:11,238 INFO L482 AbstractCegarLoop]: Abstraction has 73144 states and 274596 transitions. [2021-06-05 13:53:11,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 274596 transitions. [2021-06-05 13:53:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:11,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:11,357 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:11,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:11,558 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:11,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1372869486, now seen corresponding path program 102 times [2021-06-05 13:53:11,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:11,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145060788] [2021-06-05 13:53:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:11,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145060788] [2021-06-05 13:53:11,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145060788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:11,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558846102] [2021-06-05 13:53:11,590 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:11,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:53:11,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:11,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:53:11,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558846102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:11,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:11,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 13:53:11,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190365107] [2021-06-05 13:53:11,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:53:11,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:11,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:53:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:11,699 INFO L87 Difference]: Start difference. First operand 73144 states and 274596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:13,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:13,332 INFO L93 Difference]: Finished difference Result 90454 states and 327992 transitions. [2021-06-05 13:53:13,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 13:53:13,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:13,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:13,589 INFO L225 Difference]: With dead ends: 90454 [2021-06-05 13:53:13,589 INFO L226 Difference]: Without dead ends: 89724 [2021-06-05 13:53:13,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 554.1ms TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 13:53:13,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89724 states. [2021-06-05 13:53:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89724 to 72523. [2021-06-05 13:53:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72523 states, 72522 states have (on average 3.7569427208295414) internal successors, (272461), 72522 states have internal predecessors, (272461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:15,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72523 states to 72523 states and 272461 transitions. [2021-06-05 13:53:15,791 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 272461 transitions. Word has length 29 [2021-06-05 13:53:15,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:15,792 INFO L482 AbstractCegarLoop]: Abstraction has 72523 states and 272461 transitions. [2021-06-05 13:53:15,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:15,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 272461 transitions. [2021-06-05 13:53:15,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:15,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:15,901 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:16,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-06-05 13:53:16,102 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:16,102 INFO L82 PathProgramCache]: Analyzing trace with hash 351112822, now seen corresponding path program 103 times [2021-06-05 13:53:16,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:16,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854987787] [2021-06-05 13:53:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:16,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:16,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854987787] [2021-06-05 13:53:16,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854987787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:16,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732801961] [2021-06-05 13:53:16,123 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:16,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:53:16,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732801961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:16,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:16,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:53:16,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285931453] [2021-06-05 13:53:16,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:16,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:16,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:16,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:16,196 INFO L87 Difference]: Start difference. First operand 72523 states and 272461 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 13:53:17,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:17,103 INFO L93 Difference]: Finished difference Result 85882 states and 320374 transitions. [2021-06-05 13:53:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:53:17,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-06-05 13:53:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:17,455 INFO L225 Difference]: With dead ends: 85882 [2021-06-05 13:53:17,455 INFO L226 Difference]: Without dead ends: 85852 [2021-06-05 13:53:17,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:53:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85852 states. [2021-06-05 13:53:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85852 to 81497. [2021-06-05 13:53:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81497 states, 81496 states have (on average 3.7722342200844214) internal successors, (307422), 81496 states have internal predecessors, (307422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81497 states to 81497 states and 307422 transitions. [2021-06-05 13:53:19,279 INFO L78 Accepts]: Start accepts. Automaton has 81497 states and 307422 transitions. Word has length 29 [2021-06-05 13:53:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:19,279 INFO L482 AbstractCegarLoop]: Abstraction has 81497 states and 307422 transitions. [2021-06-05 13:53:19,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 13:53:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 81497 states and 307422 transitions. [2021-06-05 13:53:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:19,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:19,420 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:19,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 13:53:19,621 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:19,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:19,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1495713142, now seen corresponding path program 104 times [2021-06-05 13:53:19,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:19,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180088279] [2021-06-05 13:53:19,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:19,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180088279] [2021-06-05 13:53:19,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180088279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:19,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051199870] [2021-06-05 13:53:19,641 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:19,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:19,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:19,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:19,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:19,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:53:19,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051199870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:19,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:19,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:53:19,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835976131] [2021-06-05 13:53:19,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:53:19,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:19,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:53:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:53:19,710 INFO L87 Difference]: Start difference. First operand 81497 states and 307422 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 13:53:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:20,746 INFO L93 Difference]: Finished difference Result 90964 states and 338142 transitions. [2021-06-05 13:53:20,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:53:20,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-06-05 13:53:20,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:21,036 INFO L225 Difference]: With dead ends: 90964 [2021-06-05 13:53:21,036 INFO L226 Difference]: Without dead ends: 90951 [2021-06-05 13:53:21,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:53:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90951 states. [2021-06-05 13:53:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90951 to 81689. [2021-06-05 13:53:22,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81689 states, 81688 states have (on average 3.771067965919107) internal successors, (308051), 81688 states have internal predecessors, (308051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:23,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81689 states to 81689 states and 308051 transitions. [2021-06-05 13:53:23,582 INFO L78 Accepts]: Start accepts. Automaton has 81689 states and 308051 transitions. Word has length 29 [2021-06-05 13:53:23,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:23,582 INFO L482 AbstractCegarLoop]: Abstraction has 81689 states and 308051 transitions. [2021-06-05 13:53:23,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 13:53:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 81689 states and 308051 transitions. [2021-06-05 13:53:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:23,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:23,732 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:23,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:23,932 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 22394150, now seen corresponding path program 105 times [2021-06-05 13:53:23,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:23,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719648821] [2021-06-05 13:53:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:53:23,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:23,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719648821] [2021-06-05 13:53:23,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719648821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:23,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805721667] [2021-06-05 13:53:23,960 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:23,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:53:23,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:23,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:24,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805721667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:24,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:24,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 13:53:24,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302983360] [2021-06-05 13:53:24,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:53:24,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:53:24,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:24,067 INFO L87 Difference]: Start difference. First operand 81689 states and 308051 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:25,872 INFO L93 Difference]: Finished difference Result 117029 states and 423344 transitions. [2021-06-05 13:53:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 13:53:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:26,216 INFO L225 Difference]: With dead ends: 117029 [2021-06-05 13:53:26,216 INFO L226 Difference]: Without dead ends: 116821 [2021-06-05 13:53:26,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 582.4ms TimeCoverageRelationStatistics Valid=957, Invalid=3873, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 13:53:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116821 states. [2021-06-05 13:53:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116821 to 82052. [2021-06-05 13:53:28,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82052 states, 82051 states have (on average 3.7600882378033176) internal successors, (308519), 82051 states have internal predecessors, (308519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82052 states to 82052 states and 308519 transitions. [2021-06-05 13:53:28,973 INFO L78 Accepts]: Start accepts. Automaton has 82052 states and 308519 transitions. Word has length 29 [2021-06-05 13:53:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:28,973 INFO L482 AbstractCegarLoop]: Abstraction has 82052 states and 308519 transitions. [2021-06-05 13:53:28,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 82052 states and 308519 transitions. [2021-06-05 13:53:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:29,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:29,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:29,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 13:53:29,419 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:29,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:29,420 INFO L82 PathProgramCache]: Analyzing trace with hash 954640786, now seen corresponding path program 106 times [2021-06-05 13:53:29,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:29,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589347363] [2021-06-05 13:53:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:29,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:29,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589347363] [2021-06-05 13:53:29,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589347363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:29,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140168831] [2021-06-05 13:53:29,451 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:29,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:53:29,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:29,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:29,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:53:29,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140168831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:29,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:29,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 13:53:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702230903] [2021-06-05 13:53:29,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:53:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:29,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:53:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:29,515 INFO L87 Difference]: Start difference. First operand 82052 states and 308519 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:30,038 INFO L93 Difference]: Finished difference Result 86807 states and 321949 transitions. [2021-06-05 13:53:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:30,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:30,255 INFO L225 Difference]: With dead ends: 86807 [2021-06-05 13:53:30,255 INFO L226 Difference]: Without dead ends: 86624 [2021-06-05 13:53:30,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:30,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86624 states. [2021-06-05 13:53:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86624 to 81742. [2021-06-05 13:53:32,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81742 states, 81741 states have (on average 3.760120380225346) internal successors, (307356), 81741 states have internal predecessors, (307356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:32,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81742 states to 81742 states and 307356 transitions. [2021-06-05 13:53:32,609 INFO L78 Accepts]: Start accepts. Automaton has 81742 states and 307356 transitions. Word has length 29 [2021-06-05 13:53:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:32,609 INFO L482 AbstractCegarLoop]: Abstraction has 81742 states and 307356 transitions. [2021-06-05 13:53:32,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 81742 states and 307356 transitions. [2021-06-05 13:53:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:32,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:32,732 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:32,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 13:53:32,932 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:32,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1306191286, now seen corresponding path program 107 times [2021-06-05 13:53:32,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:32,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96067454] [2021-06-05 13:53:32,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:32,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:32,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96067454] [2021-06-05 13:53:32,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96067454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:32,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032740649] [2021-06-05 13:53:32,993 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:33,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:53:33,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:33,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:33,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032740649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:33,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:33,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 13:53:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627075517] [2021-06-05 13:53:33,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:53:33,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:53:33,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:33,092 INFO L87 Difference]: Start difference. First operand 81742 states and 307356 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:33,822 INFO L93 Difference]: Finished difference Result 105120 states and 389933 transitions. [2021-06-05 13:53:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:53:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:34,670 INFO L225 Difference]: With dead ends: 105120 [2021-06-05 13:53:34,670 INFO L226 Difference]: Without dead ends: 104966 [2021-06-05 13:53:34,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 13:53:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104966 states. [2021-06-05 13:53:36,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104966 to 90971. [2021-06-05 13:53:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90971 states, 90970 states have (on average 3.763823238430252) internal successors, (342395), 90970 states have internal predecessors, (342395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:36,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90971 states to 90971 states and 342395 transitions. [2021-06-05 13:53:36,943 INFO L78 Accepts]: Start accepts. Automaton has 90971 states and 342395 transitions. Word has length 29 [2021-06-05 13:53:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:36,943 INFO L482 AbstractCegarLoop]: Abstraction has 90971 states and 342395 transitions. [2021-06-05 13:53:36,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 90971 states and 342395 transitions. [2021-06-05 13:53:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:37,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:37,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:37,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 13:53:37,283 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:37,283 INFO L82 PathProgramCache]: Analyzing trace with hash -136054070, now seen corresponding path program 108 times [2021-06-05 13:53:37,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:37,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753327170] [2021-06-05 13:53:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:37,733 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 6 [2021-06-05 13:53:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:53:37,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753327170] [2021-06-05 13:53:37,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753327170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:37,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422448097] [2021-06-05 13:53:37,791 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:37,894 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:53:37,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:53:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422448097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:37,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:37,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 13:53:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531670532] [2021-06-05 13:53:37,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:53:37,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:37,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:53:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:53:37,977 INFO L87 Difference]: Start difference. First operand 90971 states and 342395 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:39,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:39,460 INFO L93 Difference]: Finished difference Result 124333 states and 441738 transitions. [2021-06-05 13:53:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 13:53:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:39,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:40,313 INFO L225 Difference]: With dead ends: 124333 [2021-06-05 13:53:40,313 INFO L226 Difference]: Without dead ends: 124126 [2021-06-05 13:53:40,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 675.2ms TimeCoverageRelationStatistics Valid=1215, Invalid=4335, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 13:53:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124126 states. [2021-06-05 13:53:42,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124126 to 81617. [2021-06-05 13:53:42,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81617 states, 81616 states have (on average 3.7307023132719075) internal successors, (304485), 81616 states have internal predecessors, (304485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81617 states to 81617 states and 304485 transitions. [2021-06-05 13:53:42,543 INFO L78 Accepts]: Start accepts. Automaton has 81617 states and 304485 transitions. Word has length 29 [2021-06-05 13:53:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:42,544 INFO L482 AbstractCegarLoop]: Abstraction has 81617 states and 304485 transitions. [2021-06-05 13:53:42,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 81617 states and 304485 transitions. [2021-06-05 13:53:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:42,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:42,683 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:42,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:42,885 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2042862942, now seen corresponding path program 109 times [2021-06-05 13:53:42,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:42,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254425264] [2021-06-05 13:53:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:42,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254425264] [2021-06-05 13:53:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254425264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313245523] [2021-06-05 13:53:42,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:42,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:42,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:53:42,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313245523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:42,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:42,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-06-05 13:53:42,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523468633] [2021-06-05 13:53:42,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:53:42,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:42,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:53:42,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:53:42,979 INFO L87 Difference]: Start difference. First operand 81617 states and 304485 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:53:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:44,040 INFO L93 Difference]: Finished difference Result 104858 states and 384069 transitions. [2021-06-05 13:53:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 13:53:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 29 [2021-06-05 13:53:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:44,357 INFO L225 Difference]: With dead ends: 104858 [2021-06-05 13:53:44,357 INFO L226 Difference]: Without dead ends: 104830 [2021-06-05 13:53:44,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:53:44,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104830 states. [2021-06-05 13:53:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104830 to 80598. [2021-06-05 13:53:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80598 states, 80597 states have (on average 3.718897725721801) internal successors, (299732), 80597 states have internal predecessors, (299732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80598 states to 80598 states and 299732 transitions. [2021-06-05 13:53:46,968 INFO L78 Accepts]: Start accepts. Automaton has 80598 states and 299732 transitions. Word has length 29 [2021-06-05 13:53:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:46,968 INFO L482 AbstractCegarLoop]: Abstraction has 80598 states and 299732 transitions. [2021-06-05 13:53:46,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 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 13:53:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 80598 states and 299732 transitions. [2021-06-05 13:53:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:47,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:47,099 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:47,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 13:53:47,301 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:47,301 INFO L82 PathProgramCache]: Analyzing trace with hash 99679966, now seen corresponding path program 110 times [2021-06-05 13:53:47,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:47,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119924538] [2021-06-05 13:53:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:47,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:47,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119924538] [2021-06-05 13:53:47,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119924538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:47,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210487052] [2021-06-05 13:53:47,332 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:47,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:53:47,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:47,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:47,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 13:53:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210487052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:47,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:47,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 13:53:47,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78247628] [2021-06-05 13:53:47,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:53:47,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:47,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:53:47,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:47,415 INFO L87 Difference]: Start difference. First operand 80598 states and 299732 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:49,149 INFO L93 Difference]: Finished difference Result 120372 states and 431223 transitions. [2021-06-05 13:53:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:53:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:49,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:49,536 INFO L225 Difference]: With dead ends: 120372 [2021-06-05 13:53:49,537 INFO L226 Difference]: Without dead ends: 120022 [2021-06-05 13:53:49,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=699, Invalid=2493, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 13:53:49,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120022 states. [2021-06-05 13:53:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120022 to 96150. [2021-06-05 13:53:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96150 states, 96149 states have (on average 3.740330112637677) internal successors, (359629), 96149 states have internal predecessors, (359629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96150 states to 96150 states and 359629 transitions. [2021-06-05 13:53:52,409 INFO L78 Accepts]: Start accepts. Automaton has 96150 states and 359629 transitions. Word has length 29 [2021-06-05 13:53:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:52,409 INFO L482 AbstractCegarLoop]: Abstraction has 96150 states and 359629 transitions. [2021-06-05 13:53:52,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 96150 states and 359629 transitions. [2021-06-05 13:53:52,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:52,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:52,568 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:53:52,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 13:53:52,780 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:53:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:53:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1163429594, now seen corresponding path program 111 times [2021-06-05 13:53:52,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:53:52,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024511234] [2021-06-05 13:53:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:53:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:53:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:53:52,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:53:52,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024511234] [2021-06-05 13:53:52,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024511234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:52,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048553035] [2021-06-05 13:53:52,811 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:53:52,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:53:52,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:53:52,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:53:52,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:53:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:53:52,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048553035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:53:52,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:53:52,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 13:53:52,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80907820] [2021-06-05 13:53:52,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 13:53:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:53:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 13:53:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:53:52,895 INFO L87 Difference]: Start difference. First operand 96150 states and 359629 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:53:55,159 INFO L93 Difference]: Finished difference Result 158751 states and 577161 transitions. [2021-06-05 13:53:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 13:53:55,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:53:55,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:53:55,719 INFO L225 Difference]: With dead ends: 158751 [2021-06-05 13:53:55,719 INFO L226 Difference]: Without dead ends: 157945 [2021-06-05 13:53:55,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 13:53:55,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157945 states. [2021-06-05 13:53:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157945 to 113836. [2021-06-05 13:53:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113836 states, 113835 states have (on average 3.7557693152369658) internal successors, (427538), 113835 states have internal predecessors, (427538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113836 states to 113836 states and 427538 transitions. [2021-06-05 13:53:59,140 INFO L78 Accepts]: Start accepts. Automaton has 113836 states and 427538 transitions. Word has length 29 [2021-06-05 13:53:59,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:53:59,140 INFO L482 AbstractCegarLoop]: Abstraction has 113836 states and 427538 transitions. [2021-06-05 13:53:59,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:53:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 113836 states and 427538 transitions. [2021-06-05 13:53:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:53:59,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:53:59,843 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:00,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:00,065 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:00,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1318670174, now seen corresponding path program 112 times [2021-06-05 13:54:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:00,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740154649] [2021-06-05 13:54:00,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:00,090 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 13:54:00,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:00,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740154649] [2021-06-05 13:54:00,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740154649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:00,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804589348] [2021-06-05 13:54:00,091 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:00,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:00,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:00,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804589348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:00,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:00,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 13:54:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861845117] [2021-06-05 13:54:00,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:00,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:00,151 INFO L87 Difference]: Start difference. First operand 113836 states and 427538 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 13:54:00,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:00,822 INFO L93 Difference]: Finished difference Result 124805 states and 462681 transitions. [2021-06-05 13:54:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:00,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 29 [2021-06-05 13:54:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:01,167 INFO L225 Difference]: With dead ends: 124805 [2021-06-05 13:54:01,167 INFO L226 Difference]: Without dead ends: 124469 [2021-06-05 13:54:01,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:54:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124469 states. [2021-06-05 13:54:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124469 to 117136. [2021-06-05 13:54:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117136 states, 117135 states have (on average 3.760541255815939) internal successors, (440491), 117135 states have internal predecessors, (440491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117136 states to 117136 states and 440491 transitions. [2021-06-05 13:54:04,336 INFO L78 Accepts]: Start accepts. Automaton has 117136 states and 440491 transitions. Word has length 29 [2021-06-05 13:54:04,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:04,336 INFO L482 AbstractCegarLoop]: Abstraction has 117136 states and 440491 transitions. [2021-06-05 13:54:04,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 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 13:54:04,336 INFO L276 IsEmpty]: Start isEmpty. Operand 117136 states and 440491 transitions. [2021-06-05 13:54:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:05,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:05,125 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:05,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:05,341 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -190689630, now seen corresponding path program 113 times [2021-06-05 13:54:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:05,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133326156] [2021-06-05 13:54:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:54:05,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:05,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133326156] [2021-06-05 13:54:05,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133326156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257899708] [2021-06-05 13:54:05,364 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:05,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:54:05,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:05,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:05,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:05,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257899708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:05,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:05,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:05,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955052343] [2021-06-05 13:54:05,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:05,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:05,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:05,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:05,426 INFO L87 Difference]: Start difference. First operand 117136 states and 440491 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 13:54:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:06,100 INFO L93 Difference]: Finished difference Result 131593 states and 486537 transitions. [2021-06-05 13:54:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:06,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 29 [2021-06-05 13:54:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:06,483 INFO L225 Difference]: With dead ends: 131593 [2021-06-05 13:54:06,483 INFO L226 Difference]: Without dead ends: 131578 [2021-06-05 13:54:06,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:06,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131578 states. [2021-06-05 13:54:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131578 to 118035. [2021-06-05 13:54:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118035 states, 118034 states have (on average 3.757493603537964) internal successors, (443512), 118034 states have internal predecessors, (443512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118035 states to 118035 states and 443512 transitions. [2021-06-05 13:54:10,221 INFO L78 Accepts]: Start accepts. Automaton has 118035 states and 443512 transitions. Word has length 29 [2021-06-05 13:54:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:10,221 INFO L482 AbstractCegarLoop]: Abstraction has 118035 states and 443512 transitions. [2021-06-05 13:54:10,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 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 13:54:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 118035 states and 443512 transitions. [2021-06-05 13:54:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:10,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:10,462 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:10,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:10,673 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:10,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:10,673 INFO L82 PathProgramCache]: Analyzing trace with hash 68105694, now seen corresponding path program 114 times [2021-06-05 13:54:10,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:10,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242651042] [2021-06-05 13:54:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:10,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:10,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242651042] [2021-06-05 13:54:10,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242651042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:10,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875497996] [2021-06-05 13:54:10,699 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:10,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:10,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:10,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:10,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:54:10,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875497996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:10,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:10,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 13:54:10,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872298324] [2021-06-05 13:54:10,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 13:54:10,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:10,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 13:54:10,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:54:10,790 INFO L87 Difference]: Start difference. First operand 118035 states and 443512 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:12,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:12,934 INFO L93 Difference]: Finished difference Result 162417 states and 578150 transitions. [2021-06-05 13:54:12,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 13:54:12,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:13,400 INFO L225 Difference]: With dead ends: 162417 [2021-06-05 13:54:13,400 INFO L226 Difference]: Without dead ends: 162210 [2021-06-05 13:54:13,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=1397, Invalid=4609, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 13:54:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162210 states. [2021-06-05 13:54:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162210 to 119675. [2021-06-05 13:54:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119675 states, 119674 states have (on average 3.739550779617962) internal successors, (447527), 119674 states have internal predecessors, (447527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119675 states to 119675 states and 447527 transitions. [2021-06-05 13:54:16,616 INFO L78 Accepts]: Start accepts. Automaton has 119675 states and 447527 transitions. Word has length 29 [2021-06-05 13:54:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:16,616 INFO L482 AbstractCegarLoop]: Abstraction has 119675 states and 447527 transitions. [2021-06-05 13:54:16,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 119675 states and 447527 transitions. [2021-06-05 13:54:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:16,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:16,793 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:16,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:16,993 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:16,994 INFO L82 PathProgramCache]: Analyzing trace with hash 218777654, now seen corresponding path program 115 times [2021-06-05 13:54:16,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:16,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666377609] [2021-06-05 13:54:16,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:17,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:17,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666377609] [2021-06-05 13:54:17,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666377609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609926861] [2021-06-05 13:54:17,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:54:17,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609926861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:17,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:17,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:17,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582760861] [2021-06-05 13:54:17,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:17,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:17,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:17,074 INFO L87 Difference]: Start difference. First operand 119675 states and 447527 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:18,334 INFO L93 Difference]: Finished difference Result 135149 states and 501662 transitions. [2021-06-05 13:54:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:54:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:18,733 INFO L225 Difference]: With dead ends: 135149 [2021-06-05 13:54:18,733 INFO L226 Difference]: Without dead ends: 135117 [2021-06-05 13:54:18,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 13:54:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135117 states. [2021-06-05 13:54:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135117 to 129535. [2021-06-05 13:54:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129535 states, 129534 states have (on average 3.746946747572066) internal successors, (485357), 129534 states have internal predecessors, (485357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:22,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129535 states to 129535 states and 485357 transitions. [2021-06-05 13:54:22,598 INFO L78 Accepts]: Start accepts. Automaton has 129535 states and 485357 transitions. Word has length 29 [2021-06-05 13:54:22,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:22,599 INFO L482 AbstractCegarLoop]: Abstraction has 129535 states and 485357 transitions. [2021-06-05 13:54:22,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 129535 states and 485357 transitions. [2021-06-05 13:54:22,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:22,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:22,878 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:23,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 13:54:23,101 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:23,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:23,101 INFO L82 PathProgramCache]: Analyzing trace with hash 512401842, now seen corresponding path program 116 times [2021-06-05 13:54:23,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:23,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718221027] [2021-06-05 13:54:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:23,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:23,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718221027] [2021-06-05 13:54:23,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718221027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734569973] [2021-06-05 13:54:23,121 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:23,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:54:23,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:54:23,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734569973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:23,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:23,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 13:54:23,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433488696] [2021-06-05 13:54:23,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:54:23,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:23,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:54:23,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:54:23,182 INFO L87 Difference]: Start difference. First operand 129535 states and 485357 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:23,881 INFO L93 Difference]: Finished difference Result 143528 states and 531160 transitions. [2021-06-05 13:54:23,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:23,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:23,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:25,048 INFO L225 Difference]: With dead ends: 143528 [2021-06-05 13:54:25,048 INFO L226 Difference]: Without dead ends: 143516 [2021-06-05 13:54:25,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143516 states. [2021-06-05 13:54:27,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143516 to 130136. [2021-06-05 13:54:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130136 states, 130135 states have (on average 3.7450416874783876) internal successors, (487361), 130135 states have internal predecessors, (487361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:28,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130136 states to 130136 states and 487361 transitions. [2021-06-05 13:54:28,265 INFO L78 Accepts]: Start accepts. Automaton has 130136 states and 487361 transitions. Word has length 29 [2021-06-05 13:54:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:28,265 INFO L482 AbstractCegarLoop]: Abstraction has 130136 states and 487361 transitions. [2021-06-05 13:54:28,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:28,265 INFO L276 IsEmpty]: Start isEmpty. Operand 130136 states and 487361 transitions. [2021-06-05 13:54:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:28,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:28,466 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:28,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 13:54:28,666 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:28,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:28,667 INFO L82 PathProgramCache]: Analyzing trace with hash 677507946, now seen corresponding path program 117 times [2021-06-05 13:54:28,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:28,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099569363] [2021-06-05 13:54:28,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:28,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:28,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099569363] [2021-06-05 13:54:28,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099569363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:28,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738449309] [2021-06-05 13:54:28,702 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:28,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:54:28,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:54:28,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738449309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:28,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:28,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 13:54:28,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569294639] [2021-06-05 13:54:28,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 13:54:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 13:54:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:54:28,780 INFO L87 Difference]: Start difference. First operand 130136 states and 487361 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:30,501 INFO L93 Difference]: Finished difference Result 158841 states and 570866 transitions. [2021-06-05 13:54:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 13:54:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:30,968 INFO L225 Difference]: With dead ends: 158841 [2021-06-05 13:54:30,968 INFO L226 Difference]: Without dead ends: 158080 [2021-06-05 13:54:30,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 269.9ms TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 13:54:31,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158080 states. [2021-06-05 13:54:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158080 to 127564. [2021-06-05 13:54:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127564 states, 127563 states have (on average 3.7467839420521623) internal successors, (477951), 127563 states have internal predecessors, (477951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127564 states to 127564 states and 477951 transitions. [2021-06-05 13:54:34,894 INFO L78 Accepts]: Start accepts. Automaton has 127564 states and 477951 transitions. Word has length 29 [2021-06-05 13:54:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:34,894 INFO L482 AbstractCegarLoop]: Abstraction has 127564 states and 477951 transitions. [2021-06-05 13:54:34,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 127564 states and 477951 transitions. [2021-06-05 13:54:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:35,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:35,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:35,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 13:54:35,317 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2080726810, now seen corresponding path program 118 times [2021-06-05 13:54:35,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:35,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522947135] [2021-06-05 13:54:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:54:35,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:35,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522947135] [2021-06-05 13:54:35,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522947135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:35,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412818057] [2021-06-05 13:54:35,339 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:35,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:54:35,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:35,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:54:35,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412818057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:35,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:35,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 13:54:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682853680] [2021-06-05 13:54:35,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 13:54:35,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:35,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 13:54:35,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 13:54:35,404 INFO L87 Difference]: Start difference. First operand 127564 states and 477951 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:36,802 INFO L93 Difference]: Finished difference Result 144032 states and 532857 transitions. [2021-06-05 13:54:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:37,319 INFO L225 Difference]: With dead ends: 144032 [2021-06-05 13:54:37,320 INFO L226 Difference]: Without dead ends: 144002 [2021-06-05 13:54:37,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144002 states. [2021-06-05 13:54:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144002 to 129426. [2021-06-05 13:54:40,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129426 states, 129425 states have (on average 3.7404597257098704) internal successors, (484109), 129425 states have internal predecessors, (484109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129426 states to 129426 states and 484109 transitions. [2021-06-05 13:54:40,578 INFO L78 Accepts]: Start accepts. Automaton has 129426 states and 484109 transitions. Word has length 29 [2021-06-05 13:54:40,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:40,578 INFO L482 AbstractCegarLoop]: Abstraction has 129426 states and 484109 transitions. [2021-06-05 13:54:40,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:40,578 INFO L276 IsEmpty]: Start isEmpty. Operand 129426 states and 484109 transitions. [2021-06-05 13:54:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:40,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:40,777 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:40,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:40,981 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1305487906, now seen corresponding path program 119 times [2021-06-05 13:54:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:40,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000645440] [2021-06-05 13:54:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:54:41,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:41,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000645440] [2021-06-05 13:54:41,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000645440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28707281] [2021-06-05 13:54:41,020 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:41,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 13:54:41,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:41,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28707281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:41,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:41,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 13:54:41,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084302718] [2021-06-05 13:54:41,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:41,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:41,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:41,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:41,087 INFO L87 Difference]: Start difference. First operand 129426 states and 484109 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:42,520 INFO L93 Difference]: Finished difference Result 143204 states and 525770 transitions. [2021-06-05 13:54:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 13:54:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:42,960 INFO L225 Difference]: With dead ends: 143204 [2021-06-05 13:54:42,960 INFO L226 Difference]: Without dead ends: 143141 [2021-06-05 13:54:42,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:54:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143141 states. [2021-06-05 13:54:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143141 to 126464. [2021-06-05 13:54:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126464 states, 126463 states have (on average 3.727643658619517) internal successors, (471409), 126463 states have internal predecessors, (471409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126464 states to 126464 states and 471409 transitions. [2021-06-05 13:54:46,000 INFO L78 Accepts]: Start accepts. Automaton has 126464 states and 471409 transitions. Word has length 29 [2021-06-05 13:54:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:46,000 INFO L482 AbstractCegarLoop]: Abstraction has 126464 states and 471409 transitions. [2021-06-05 13:54:46,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:46,000 INFO L276 IsEmpty]: Start isEmpty. Operand 126464 states and 471409 transitions. [2021-06-05 13:54:46,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:46,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:46,194 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:46,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 13:54:46,401 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:46,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:46,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2110231202, now seen corresponding path program 120 times [2021-06-05 13:54:46,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:46,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892627612] [2021-06-05 13:54:46,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:46,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:46,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892627612] [2021-06-05 13:54:46,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892627612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698285728] [2021-06-05 13:54:46,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:46,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:54:46,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:54:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:46,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698285728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:46,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:46,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 13:54:46,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195864074] [2021-06-05 13:54:46,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 13:54:46,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:46,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 13:54:46,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:46,527 INFO L87 Difference]: Start difference. First operand 126464 states and 471409 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:48,783 INFO L93 Difference]: Finished difference Result 186865 states and 670831 transitions. [2021-06-05 13:54:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 13:54:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:50,396 INFO L225 Difference]: With dead ends: 186865 [2021-06-05 13:54:50,396 INFO L226 Difference]: Without dead ends: 186574 [2021-06-05 13:54:50,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 586.1ms TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 13:54:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186574 states. [2021-06-05 13:54:53,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186574 to 129576. [2021-06-05 13:54:53,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129576 states, 129575 states have (on average 3.7100983986108433) internal successors, (480736), 129575 states have internal predecessors, (480736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:54,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129576 states to 129576 states and 480736 transitions. [2021-06-05 13:54:54,463 INFO L78 Accepts]: Start accepts. Automaton has 129576 states and 480736 transitions. Word has length 29 [2021-06-05 13:54:54,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:54:54,463 INFO L482 AbstractCegarLoop]: Abstraction has 129576 states and 480736 transitions. [2021-06-05 13:54:54,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:54,463 INFO L276 IsEmpty]: Start isEmpty. Operand 129576 states and 480736 transitions. [2021-06-05 13:54:54,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 13:54:54,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:54:54,657 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:54:54,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:54,857 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:54:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:54:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 733832030, now seen corresponding path program 121 times [2021-06-05 13:54:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:54:54,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211517642] [2021-06-05 13:54:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:54:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:54,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:54:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211517642] [2021-06-05 13:54:54,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211517642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:54,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998608904] [2021-06-05 13:54:54,883 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:54:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:54:54,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 13:54:54,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:54:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:54:54,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998608904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:54:54,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:54:54,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 13:54:54,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060470838] [2021-06-05 13:54:54,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:54:54,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:54:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:54:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:54:54,946 INFO L87 Difference]: Start difference. First operand 129576 states and 480736 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:54:56,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:54:56,330 INFO L93 Difference]: Finished difference Result 140798 states and 513511 transitions. [2021-06-05 13:54:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 13:54:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 13:54:56,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:54:56,769 INFO L225 Difference]: With dead ends: 140798 [2021-06-05 13:54:56,769 INFO L226 Difference]: Without dead ends: 140342 [2021-06-05 13:54:56,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 13:54:56,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140342 states. [2021-06-05 13:54:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140342 to 130720. [2021-06-05 13:54:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130720 states, 130719 states have (on average 3.7030959539164163) internal successors, (484065), 130719 states have internal predecessors, (484065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130720 states to 130720 states and 484065 transitions. [2021-06-05 13:55:00,031 INFO L78 Accepts]: Start accepts. Automaton has 130720 states and 484065 transitions. Word has length 29 [2021-06-05 13:55:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:00,031 INFO L482 AbstractCegarLoop]: Abstraction has 130720 states and 484065 transitions. [2021-06-05 13:55:00,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:00,031 INFO L276 IsEmpty]: Start isEmpty. Operand 130720 states and 484065 transitions. [2021-06-05 13:55:00,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:00,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:00,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:01,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 13:55:01,091 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:01,091 INFO L82 PathProgramCache]: Analyzing trace with hash 565779372, now seen corresponding path program 122 times [2021-06-05 13:55:01,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:01,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237315204] [2021-06-05 13:55:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:01,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:01,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237315204] [2021-06-05 13:55:01,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237315204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791953124] [2021-06-05 13:55:01,200 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:01,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:01,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:01,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791953124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:01,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:01,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:01,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768915953] [2021-06-05 13:55:01,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:01,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:01,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:01,517 INFO L87 Difference]: Start difference. First operand 130720 states and 484065 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:02,565 INFO L93 Difference]: Finished difference Result 130957 states and 484770 transitions. [2021-06-05 13:55:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:55:02,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:03,572 INFO L225 Difference]: With dead ends: 130957 [2021-06-05 13:55:03,572 INFO L226 Difference]: Without dead ends: 130942 [2021-06-05 13:55:03,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:55:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130942 states. [2021-06-05 13:55:05,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130942 to 130808. [2021-06-05 13:55:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130808 states, 130807 states have (on average 3.702852293837486) internal successors, (484359), 130807 states have internal predecessors, (484359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130808 states to 130808 states and 484359 transitions. [2021-06-05 13:55:06,659 INFO L78 Accepts]: Start accepts. Automaton has 130808 states and 484359 transitions. Word has length 33 [2021-06-05 13:55:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:06,659 INFO L482 AbstractCegarLoop]: Abstraction has 130808 states and 484359 transitions. [2021-06-05 13:55:06,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 130808 states and 484359 transitions. [2021-06-05 13:55:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:06,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:06,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:07,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:07,142 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:07,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:07,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1661708648, now seen corresponding path program 123 times [2021-06-05 13:55:07,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:07,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254122565] [2021-06-05 13:55:07,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:07,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:07,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254122565] [2021-06-05 13:55:07,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254122565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:07,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596543635] [2021-06-05 13:55:07,253 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:07,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:55:07,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:07,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:07,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:07,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596543635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:07,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:07,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:07,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083917856] [2021-06-05 13:55:07,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:07,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:07,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:07,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:07,586 INFO L87 Difference]: Start difference. First operand 130808 states and 484359 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:09,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:09,338 INFO L93 Difference]: Finished difference Result 131223 states and 485558 transitions. [2021-06-05 13:55:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:55:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:09,777 INFO L225 Difference]: With dead ends: 131223 [2021-06-05 13:55:09,777 INFO L226 Difference]: Without dead ends: 131110 [2021-06-05 13:55:09,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:55:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131110 states. [2021-06-05 13:55:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131110 to 130915. [2021-06-05 13:55:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130915 states, 130914 states have (on average 3.7024840735139097) internal successors, (484707), 130914 states have internal predecessors, (484707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130915 states to 130915 states and 484707 transitions. [2021-06-05 13:55:12,818 INFO L78 Accepts]: Start accepts. Automaton has 130915 states and 484707 transitions. Word has length 33 [2021-06-05 13:55:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:12,818 INFO L482 AbstractCegarLoop]: Abstraction has 130915 states and 484707 transitions. [2021-06-05 13:55:12,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 130915 states and 484707 transitions. [2021-06-05 13:55:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:13,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:13,046 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:13,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 13:55:13,249 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash 262334044, now seen corresponding path program 124 times [2021-06-05 13:55:13,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:13,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819683640] [2021-06-05 13:55:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:13,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819683640] [2021-06-05 13:55:13,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819683640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146617056] [2021-06-05 13:55:13,348 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:13,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:13,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:13,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:13,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146617056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:13,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:13,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:13,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281581492] [2021-06-05 13:55:13,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:13,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:13,683 INFO L87 Difference]: Start difference. First operand 130915 states and 484707 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:15,519 INFO L93 Difference]: Finished difference Result 131397 states and 486090 transitions. [2021-06-05 13:55:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:55:15,519 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:15,911 INFO L225 Difference]: With dead ends: 131397 [2021-06-05 13:55:15,911 INFO L226 Difference]: Without dead ends: 131308 [2021-06-05 13:55:15,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:55:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-06-05 13:55:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131025. [2021-06-05 13:55:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131025 states, 131024 states have (on average 3.7022224935889607) internal successors, (485080), 131024 states have internal predecessors, (485080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131025 states to 131025 states and 485080 transitions. [2021-06-05 13:55:19,092 INFO L78 Accepts]: Start accepts. Automaton has 131025 states and 485080 transitions. Word has length 33 [2021-06-05 13:55:19,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:19,092 INFO L482 AbstractCegarLoop]: Abstraction has 131025 states and 485080 transitions. [2021-06-05 13:55:19,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 131025 states and 485080 transitions. [2021-06-05 13:55:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:19,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:19,946 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:20,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:20,170 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1720019168, now seen corresponding path program 125 times [2021-06-05 13:55:20,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:20,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832698840] [2021-06-05 13:55:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:20,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:20,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832698840] [2021-06-05 13:55:20,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832698840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:20,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363074834] [2021-06-05 13:55:20,297 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:20,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 13:55:20,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:20,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363074834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:20,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:20,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:20,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428859551] [2021-06-05 13:55:20,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:20,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:20,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:20,634 INFO L87 Difference]: Start difference. First operand 131025 states and 485080 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:21,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:21,790 INFO L93 Difference]: Finished difference Result 131417 states and 486203 transitions. [2021-06-05 13:55:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:55:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:22,784 INFO L225 Difference]: With dead ends: 131417 [2021-06-05 13:55:22,784 INFO L226 Difference]: Without dead ends: 131387 [2021-06-05 13:55:22,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:55:22,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131387 states. [2021-06-05 13:55:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131387 to 131100. [2021-06-05 13:55:24,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131100 states, 131099 states have (on average 3.70232419774369) internal successors, (485371), 131099 states have internal predecessors, (485371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:25,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131100 states to 131100 states and 485371 transitions. [2021-06-05 13:55:25,892 INFO L78 Accepts]: Start accepts. Automaton has 131100 states and 485371 transitions. Word has length 33 [2021-06-05 13:55:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:25,893 INFO L482 AbstractCegarLoop]: Abstraction has 131100 states and 485371 transitions. [2021-06-05 13:55:25,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 131100 states and 485371 transitions. [2021-06-05 13:55:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:26,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:26,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:26,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 13:55:26,362 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash -168976428, now seen corresponding path program 126 times [2021-06-05 13:55:26,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:26,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488045172] [2021-06-05 13:55:26,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:26,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:26,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488045172] [2021-06-05 13:55:26,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488045172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:26,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146891508] [2021-06-05 13:55:26,537 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:26,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:55:26,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:26,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:26,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146891508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:26,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:26,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:26,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665014635] [2021-06-05 13:55:26,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:26,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:26,863 INFO L87 Difference]: Start difference. First operand 131100 states and 485371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:28,417 INFO L93 Difference]: Finished difference Result 131430 states and 486305 transitions. [2021-06-05 13:55:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:55:28,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:28,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:28,839 INFO L225 Difference]: With dead ends: 131430 [2021-06-05 13:55:28,839 INFO L226 Difference]: Without dead ends: 131346 [2021-06-05 13:55:28,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 396.2ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131346 states. [2021-06-05 13:55:31,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131346 to 131132. [2021-06-05 13:55:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131132 states, 131131 states have (on average 3.7021528090230382) internal successors, (485467), 131131 states have internal predecessors, (485467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131132 states to 131132 states and 485467 transitions. [2021-06-05 13:55:31,896 INFO L78 Accepts]: Start accepts. Automaton has 131132 states and 485467 transitions. Word has length 33 [2021-06-05 13:55:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:31,896 INFO L482 AbstractCegarLoop]: Abstraction has 131132 states and 485467 transitions. [2021-06-05 13:55:31,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:31,897 INFO L276 IsEmpty]: Start isEmpty. Operand 131132 states and 485467 transitions. [2021-06-05 13:55:32,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:32,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:32,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:32,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 13:55:32,334 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:32,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:32,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1755066264, now seen corresponding path program 127 times [2021-06-05 13:55:32,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:32,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571174997] [2021-06-05 13:55:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:32,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:32,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571174997] [2021-06-05 13:55:32,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571174997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:32,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24728573] [2021-06-05 13:55:32,450 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:32,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:32,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:32,773 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:32,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24728573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:32,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:32,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:32,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959576214] [2021-06-05 13:55:32,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:32,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:32,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:32,774 INFO L87 Difference]: Start difference. First operand 131132 states and 485467 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:34,344 INFO L93 Difference]: Finished difference Result 131646 states and 486891 transitions. [2021-06-05 13:55:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:34,754 INFO L225 Difference]: With dead ends: 131646 [2021-06-05 13:55:34,754 INFO L226 Difference]: Without dead ends: 131557 [2021-06-05 13:55:34,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131557 states. [2021-06-05 13:55:37,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131557 to 131193. [2021-06-05 13:55:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131193 states, 131192 states have (on average 3.7020778706018658) internal successors, (485683), 131192 states have internal predecessors, (485683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131193 states to 131193 states and 485683 transitions. [2021-06-05 13:55:37,781 INFO L78 Accepts]: Start accepts. Automaton has 131193 states and 485683 transitions. Word has length 33 [2021-06-05 13:55:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:37,781 INFO L482 AbstractCegarLoop]: Abstraction has 131193 states and 485683 transitions. [2021-06-05 13:55:37,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 131193 states and 485683 transitions. [2021-06-05 13:55:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:38,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:38,713 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:38,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 13:55:38,913 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash -227286948, now seen corresponding path program 128 times [2021-06-05 13:55:38,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:38,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978290837] [2021-06-05 13:55:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978290837] [2021-06-05 13:55:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978290837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720964952] [2021-06-05 13:55:39,010 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:39,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:55:39,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:39,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:39,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:39,272 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:39,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720964952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:39,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:39,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:39,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804788728] [2021-06-05 13:55:39,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:39,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:39,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:39,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:39,273 INFO L87 Difference]: Start difference. First operand 131193 states and 485683 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:40,237 INFO L93 Difference]: Finished difference Result 131828 states and 487461 transitions. [2021-06-05 13:55:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:41,332 INFO L225 Difference]: With dead ends: 131828 [2021-06-05 13:55:41,332 INFO L226 Difference]: Without dead ends: 131717 [2021-06-05 13:55:41,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131717 states. [2021-06-05 13:55:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131717 to 131381. [2021-06-05 13:55:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 3.7014537981427917) internal successors, (486297), 131380 states have internal predecessors, (486297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 486297 transitions. [2021-06-05 13:55:44,925 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 486297 transitions. Word has length 33 [2021-06-05 13:55:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:44,925 INFO L482 AbstractCegarLoop]: Abstraction has 131381 states and 486297 transitions. [2021-06-05 13:55:44,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 486297 transitions. [2021-06-05 13:55:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:45,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:45,339 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:45,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:45,553 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:45,553 INFO L82 PathProgramCache]: Analyzing trace with hash -410972520, now seen corresponding path program 129 times [2021-06-05 13:55:45,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:45,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842899849] [2021-06-05 13:55:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:45,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:45,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842899849] [2021-06-05 13:55:45,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842899849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:45,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935906299] [2021-06-05 13:55:45,670 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:45,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 13:55:45,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:46,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935906299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:46,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:46,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:46,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716853550] [2021-06-05 13:55:46,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:46,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:46,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:46,103 INFO L87 Difference]: Start difference. First operand 131381 states and 486297 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:47,975 INFO L93 Difference]: Finished difference Result 131995 states and 488033 transitions. [2021-06-05 13:55:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:47,976 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:48,489 INFO L225 Difference]: With dead ends: 131995 [2021-06-05 13:55:48,489 INFO L226 Difference]: Without dead ends: 131906 [2021-06-05 13:55:48,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 426.4ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:48,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131906 states. [2021-06-05 13:55:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131906 to 131576. [2021-06-05 13:55:51,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131576 states, 131575 states have (on average 3.7008626258787762) internal successors, (486941), 131575 states have internal predecessors, (486941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131576 states to 131576 states and 486941 transitions. [2021-06-05 13:55:51,624 INFO L78 Accepts]: Start accepts. Automaton has 131576 states and 486941 transitions. Word has length 33 [2021-06-05 13:55:51,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:51,624 INFO L482 AbstractCegarLoop]: Abstraction has 131576 states and 486941 transitions. [2021-06-05 13:55:51,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:51,624 INFO L276 IsEmpty]: Start isEmpty. Operand 131576 states and 486941 transitions. [2021-06-05 13:55:51,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:51,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:51,879 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:52,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:52,079 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1901641564, now seen corresponding path program 130 times [2021-06-05 13:55:52,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:52,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111516534] [2021-06-05 13:55:52,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:52,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:52,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111516534] [2021-06-05 13:55:52,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111516534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:52,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060644002] [2021-06-05 13:55:52,192 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:52,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:55:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:52,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060644002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:52,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:52,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:52,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869283119] [2021-06-05 13:55:52,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:52,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:52,439 INFO L87 Difference]: Start difference. First operand 131576 states and 486941 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:53,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:53,979 INFO L93 Difference]: Finished difference Result 132177 states and 488586 transitions. [2021-06-05 13:55:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:55:53,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:53,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:55:54,368 INFO L225 Difference]: With dead ends: 132177 [2021-06-05 13:55:54,368 INFO L226 Difference]: Without dead ends: 132066 [2021-06-05 13:55:54,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:55:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132066 states. [2021-06-05 13:55:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132066 to 131642. [2021-06-05 13:55:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.700853077688562) internal successors, (487184), 131641 states have internal predecessors, (487184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 487184 transitions. [2021-06-05 13:55:57,365 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 487184 transitions. Word has length 33 [2021-06-05 13:55:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:55:57,365 INFO L482 AbstractCegarLoop]: Abstraction has 131642 states and 487184 transitions. [2021-06-05 13:55:57,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 487184 transitions. [2021-06-05 13:55:58,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:55:58,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:55:58,270 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:55:58,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 13:55:58,501 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:55:58,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:55:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash -773235108, now seen corresponding path program 131 times [2021-06-05 13:55:58,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:55:58,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983486381] [2021-06-05 13:55:58,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:55:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:55:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:58,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:55:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983486381] [2021-06-05 13:55:58,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983486381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793963259] [2021-06-05 13:55:58,598 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:55:58,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:55:58,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:55:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:55:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:55:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:55:58,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793963259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:55:58,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:55:58,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:55:58,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073713765] [2021-06-05 13:55:58,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:55:58,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:55:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:55:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:55:58,848 INFO L87 Difference]: Start difference. First operand 131642 states and 487184 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:55:59,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:55:59,874 INFO L93 Difference]: Finished difference Result 132137 states and 488592 transitions. [2021-06-05 13:55:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:55:59,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:55:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:00,258 INFO L225 Difference]: With dead ends: 132137 [2021-06-05 13:56:00,258 INFO L226 Difference]: Without dead ends: 132107 [2021-06-05 13:56:00,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:56:01,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132107 states. [2021-06-05 13:56:02,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132107 to 131739. [2021-06-05 13:56:03,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131739 states, 131738 states have (on average 3.7007697095750656) internal successors, (487532), 131738 states have internal predecessors, (487532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131739 states to 131739 states and 487532 transitions. [2021-06-05 13:56:03,956 INFO L78 Accepts]: Start accepts. Automaton has 131739 states and 487532 transitions. Word has length 33 [2021-06-05 13:56:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:03,957 INFO L482 AbstractCegarLoop]: Abstraction has 131739 states and 487532 transitions. [2021-06-05 13:56:03,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 131739 states and 487532 transitions. [2021-06-05 13:56:04,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:04,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:04,217 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:04,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 13:56:04,417 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:04,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:04,418 INFO L82 PathProgramCache]: Analyzing trace with hash -172389872, now seen corresponding path program 132 times [2021-06-05 13:56:04,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:04,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872754376] [2021-06-05 13:56:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:04,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:04,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872754376] [2021-06-05 13:56:04,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872754376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663665119] [2021-06-05 13:56:04,522 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:04,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:04,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:04,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:04,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663665119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:04,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:04,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:04,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800199868] [2021-06-05 13:56:04,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:04,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:04,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:04,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:04,783 INFO L87 Difference]: Start difference. First operand 131739 states and 487532 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:06,345 INFO L93 Difference]: Finished difference Result 132172 states and 488791 transitions. [2021-06-05 13:56:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:56:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:06,795 INFO L225 Difference]: With dead ends: 132172 [2021-06-05 13:56:06,795 INFO L226 Difference]: Without dead ends: 132142 [2021-06-05 13:56:06,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132142 states. [2021-06-05 13:56:09,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132142 to 131868. [2021-06-05 13:56:09,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131868 states, 131867 states have (on average 3.7004481788468686) internal successors, (487967), 131867 states have internal predecessors, (487967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131868 states to 131868 states and 487967 transitions. [2021-06-05 13:56:09,908 INFO L78 Accepts]: Start accepts. Automaton has 131868 states and 487967 transitions. Word has length 33 [2021-06-05 13:56:09,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:09,908 INFO L482 AbstractCegarLoop]: Abstraction has 131868 states and 487967 transitions. [2021-06-05 13:56:09,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 131868 states and 487967 transitions. [2021-06-05 13:56:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:10,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:10,143 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:10,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:10,343 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:10,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1751652820, now seen corresponding path program 133 times [2021-06-05 13:56:10,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:10,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630340588] [2021-06-05 13:56:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:10,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:10,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630340588] [2021-06-05 13:56:10,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630340588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725913870] [2021-06-05 13:56:10,488 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:10,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:10,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:10,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725913870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:10,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:10,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:10,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781748049] [2021-06-05 13:56:10,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:10,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:10,809 INFO L87 Difference]: Start difference. First operand 131868 states and 487967 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:12,394 INFO L93 Difference]: Finished difference Result 132329 states and 489260 transitions. [2021-06-05 13:56:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:12,760 INFO L225 Difference]: With dead ends: 132329 [2021-06-05 13:56:12,760 INFO L226 Difference]: Without dead ends: 132261 [2021-06-05 13:56:12,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132261 states. [2021-06-05 13:56:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132261 to 131985. [2021-06-05 13:56:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131985 states, 131984 states have (on average 3.7004258091889928) internal successors, (488397), 131984 states have internal predecessors, (488397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131985 states to 131985 states and 488397 transitions. [2021-06-05 13:56:15,796 INFO L78 Accepts]: Start accepts. Automaton has 131985 states and 488397 transitions. Word has length 33 [2021-06-05 13:56:15,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:15,797 INFO L482 AbstractCegarLoop]: Abstraction has 131985 states and 488397 transitions. [2021-06-05 13:56:15,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 131985 states and 488397 transitions. [2021-06-05 13:56:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:16,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:16,775 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:17,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:17,002 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:17,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:17,002 INFO L82 PathProgramCache]: Analyzing trace with hash -230700392, now seen corresponding path program 134 times [2021-06-05 13:56:17,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:17,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367266401] [2021-06-05 13:56:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:17,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:17,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367266401] [2021-06-05 13:56:17,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367266401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099623261] [2021-06-05 13:56:17,099 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:17,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:17,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:17,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:17,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:17,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099623261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:17,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:17,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:17,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809829828] [2021-06-05 13:56:17,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:17,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:17,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:17,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:17,338 INFO L87 Difference]: Start difference. First operand 131985 states and 488397 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:18,352 INFO L93 Difference]: Finished difference Result 132441 states and 489638 transitions. [2021-06-05 13:56:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:56:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:19,420 INFO L225 Difference]: With dead ends: 132441 [2021-06-05 13:56:19,421 INFO L226 Difference]: Without dead ends: 132361 [2021-06-05 13:56:19,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132361 states. [2021-06-05 13:56:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132361 to 131999. [2021-06-05 13:56:21,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131999 states, 131998 states have (on average 3.700328792860498) internal successors, (488436), 131998 states have internal predecessors, (488436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131999 states to 131999 states and 488436 transitions. [2021-06-05 13:56:22,460 INFO L78 Accepts]: Start accepts. Automaton has 131999 states and 488436 transitions. Word has length 33 [2021-06-05 13:56:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:22,460 INFO L482 AbstractCegarLoop]: Abstraction has 131999 states and 488436 transitions. [2021-06-05 13:56:22,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 131999 states and 488436 transitions. [2021-06-05 13:56:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:22,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:22,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:22,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:22,924 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:22,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:22,924 INFO L82 PathProgramCache]: Analyzing trace with hash -414385964, now seen corresponding path program 135 times [2021-06-05 13:56:22,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:22,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213657701] [2021-06-05 13:56:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:23,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213657701] [2021-06-05 13:56:23,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213657701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148148365] [2021-06-05 13:56:23,020 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:23,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:56:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:23,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:23,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148148365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:23,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:23,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:23,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124638396] [2021-06-05 13:56:23,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:23,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:23,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:23,332 INFO L87 Difference]: Start difference. First operand 131999 states and 488436 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:24,802 INFO L93 Difference]: Finished difference Result 132789 states and 490695 transitions. [2021-06-05 13:56:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:24,803 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:25,246 INFO L225 Difference]: With dead ends: 132789 [2021-06-05 13:56:25,246 INFO L226 Difference]: Without dead ends: 132700 [2021-06-05 13:56:25,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132700 states. [2021-06-05 13:56:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132700 to 132304. [2021-06-05 13:56:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132304 states, 132303 states have (on average 3.699349221106097) internal successors, (489435), 132303 states have internal predecessors, (489435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132304 states to 132304 states and 489435 transitions. [2021-06-05 13:56:28,243 INFO L78 Accepts]: Start accepts. Automaton has 132304 states and 489435 transitions. Word has length 33 [2021-06-05 13:56:28,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:28,243 INFO L482 AbstractCegarLoop]: Abstraction has 132304 states and 489435 transitions. [2021-06-05 13:56:28,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand 132304 states and 489435 transitions. [2021-06-05 13:56:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:28,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:28,500 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:28,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 13:56:28,702 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:28,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1898228120, now seen corresponding path program 136 times [2021-06-05 13:56:28,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:28,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111272551] [2021-06-05 13:56:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:28,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:28,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111272551] [2021-06-05 13:56:28,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111272551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:28,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677812848] [2021-06-05 13:56:28,822 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:28,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:56:28,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:28,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:29,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677812848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:29,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:29,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:29,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560263889] [2021-06-05 13:56:29,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:29,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:29,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:29,695 INFO L87 Difference]: Start difference. First operand 132304 states and 489435 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:30,717 INFO L93 Difference]: Finished difference Result 132973 states and 491280 transitions. [2021-06-05 13:56:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:31,092 INFO L225 Difference]: With dead ends: 132973 [2021-06-05 13:56:31,093 INFO L226 Difference]: Without dead ends: 132862 [2021-06-05 13:56:31,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 930.2ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:31,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132862 states. [2021-06-05 13:56:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132862 to 132462. [2021-06-05 13:56:33,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132462 states, 132461 states have (on average 3.698794362114132) internal successors, (489946), 132461 states have internal predecessors, (489946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:35,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132462 states to 132462 states and 489946 transitions. [2021-06-05 13:56:35,098 INFO L78 Accepts]: Start accepts. Automaton has 132462 states and 489946 transitions. Word has length 33 [2021-06-05 13:56:35,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:35,098 INFO L482 AbstractCegarLoop]: Abstraction has 132462 states and 489946 transitions. [2021-06-05 13:56:35,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:35,098 INFO L276 IsEmpty]: Start isEmpty. Operand 132462 states and 489946 transitions. [2021-06-05 13:56:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:35,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:35,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:35,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 13:56:35,733 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:35,733 INFO L82 PathProgramCache]: Analyzing trace with hash -776648552, now seen corresponding path program 137 times [2021-06-05 13:56:35,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:35,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458501678] [2021-06-05 13:56:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:35,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458501678] [2021-06-05 13:56:35,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458501678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260664035] [2021-06-05 13:56:35,871 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:35,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 13:56:35,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:35,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:36,210 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:36,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260664035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:36,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:36,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:36,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794628988] [2021-06-05 13:56:36,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:36,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:36,212 INFO L87 Difference]: Start difference. First operand 132462 states and 489946 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:38,074 INFO L93 Difference]: Finished difference Result 133313 states and 492428 transitions. [2021-06-05 13:56:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:38,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:38,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:38,758 INFO L225 Difference]: With dead ends: 133313 [2021-06-05 13:56:38,758 INFO L226 Difference]: Without dead ends: 133267 [2021-06-05 13:56:38,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:38,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133267 states. [2021-06-05 13:56:41,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133267 to 132771. [2021-06-05 13:56:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132771 states, 132770 states have (on average 3.697635007908413) internal successors, (490935), 132770 states have internal predecessors, (490935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:41,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132771 states to 132771 states and 490935 transitions. [2021-06-05 13:56:41,887 INFO L78 Accepts]: Start accepts. Automaton has 132771 states and 490935 transitions. Word has length 33 [2021-06-05 13:56:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:41,888 INFO L482 AbstractCegarLoop]: Abstraction has 132771 states and 490935 transitions. [2021-06-05 13:56:41,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 132771 states and 490935 transitions. [2021-06-05 13:56:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:42,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:42,135 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:42,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 13:56:42,335 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1081481172, now seen corresponding path program 138 times [2021-06-05 13:56:42,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:42,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285315206] [2021-06-05 13:56:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:42,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:42,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285315206] [2021-06-05 13:56:42,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285315206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731981677] [2021-06-05 13:56:42,440 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:42,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:56:42,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:42,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:42,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:42,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731981677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:42,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:42,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:42,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659014517] [2021-06-05 13:56:42,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:42,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:42,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:42,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:42,700 INFO L87 Difference]: Start difference. First operand 132771 states and 490935 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:44,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:44,209 INFO L93 Difference]: Finished difference Result 133655 states and 493544 transitions. [2021-06-05 13:56:44,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:44,210 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:44,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:44,609 INFO L225 Difference]: With dead ends: 133655 [2021-06-05 13:56:44,609 INFO L226 Difference]: Without dead ends: 133607 [2021-06-05 13:56:44,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 319.3ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133607 states. [2021-06-05 13:56:46,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133607 to 133055. [2021-06-05 13:56:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133055 states, 133054 states have (on average 3.697047815172787) internal successors, (491907), 133054 states have internal predecessors, (491907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133055 states to 133055 states and 491907 transitions. [2021-06-05 13:56:47,581 INFO L78 Accepts]: Start accepts. Automaton has 133055 states and 491907 transitions. Word has length 33 [2021-06-05 13:56:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:47,581 INFO L482 AbstractCegarLoop]: Abstraction has 133055 states and 491907 transitions. [2021-06-05 13:56:47,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 133055 states and 491907 transitions. [2021-06-05 13:56:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:48,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:48,514 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:48,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 13:56:48,729 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:48,729 INFO L82 PathProgramCache]: Analyzing trace with hash -900872040, now seen corresponding path program 139 times [2021-06-05 13:56:48,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:48,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022162269] [2021-06-05 13:56:48,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,829 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:48,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:48,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022162269] [2021-06-05 13:56:48,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022162269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:48,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345100233] [2021-06-05 13:56:48,830 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:48,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:49,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345100233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:49,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:49,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:49,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591259783] [2021-06-05 13:56:49,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:49,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:49,095 INFO L87 Difference]: Start difference. First operand 133055 states and 491907 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:50,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:50,062 INFO L93 Difference]: Finished difference Result 134042 states and 494886 transitions. [2021-06-05 13:56:50,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:50,062 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:50,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:51,016 INFO L225 Difference]: With dead ends: 134042 [2021-06-05 13:56:51,016 INFO L226 Difference]: Without dead ends: 133996 [2021-06-05 13:56:51,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 315.7ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133996 states. [2021-06-05 13:56:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133996 to 133457. [2021-06-05 13:56:53,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133457 states, 133456 states have (on average 3.696132058506174) internal successors, (493271), 133456 states have internal predecessors, (493271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133457 states to 133457 states and 493271 transitions. [2021-06-05 13:56:54,136 INFO L78 Accepts]: Start accepts. Automaton has 133457 states and 493271 transitions. Word has length 33 [2021-06-05 13:56:54,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:56:54,136 INFO L482 AbstractCegarLoop]: Abstraction has 133457 states and 493271 transitions. [2021-06-05 13:56:54,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 133457 states and 493271 transitions. [2021-06-05 13:56:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:56:54,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:56:54,403 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:56:54,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 13:56:54,603 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:56:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:56:54,603 INFO L82 PathProgramCache]: Analyzing trace with hash 719218584, now seen corresponding path program 140 times [2021-06-05 13:56:54,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:56:54,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133709393] [2021-06-05 13:56:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:56:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:56:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:56:54,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133709393] [2021-06-05 13:56:54,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133709393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318773533] [2021-06-05 13:56:54,703 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:56:54,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:56:54,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:56:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:56:54,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:56:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:56:54,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318773533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:56:54,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:56:54,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:56:54,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078523622] [2021-06-05 13:56:54,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:56:54,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:56:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:56:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:56:54,959 INFO L87 Difference]: Start difference. First operand 133457 states and 493271 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:56:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:56:56,578 INFO L93 Difference]: Finished difference Result 134285 states and 495729 transitions. [2021-06-05 13:56:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:56:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:56:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:56:57,003 INFO L225 Difference]: With dead ends: 134285 [2021-06-05 13:56:57,003 INFO L226 Difference]: Without dead ends: 134239 [2021-06-05 13:56:57,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:56:57,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134239 states. [2021-06-05 13:56:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134239 to 133729. [2021-06-05 13:56:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133729 states, 133728 states have (on average 3.6952844580043074) internal successors, (494163), 133728 states have internal predecessors, (494163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133729 states to 133729 states and 494163 transitions. [2021-06-05 13:57:00,027 INFO L78 Accepts]: Start accepts. Automaton has 133729 states and 494163 transitions. Word has length 33 [2021-06-05 13:57:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:00,027 INFO L482 AbstractCegarLoop]: Abstraction has 133729 states and 494163 transitions. [2021-06-05 13:57:00,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 133729 states and 494163 transitions. [2021-06-05 13:57:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:00,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:00,270 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:00,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 13:57:00,470 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1446820200, now seen corresponding path program 141 times [2021-06-05 13:57:00,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:00,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676596358] [2021-06-05 13:57:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:00,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:00,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:00,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676596358] [2021-06-05 13:57:00,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676596358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:00,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141934954] [2021-06-05 13:57:00,588 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:00,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 13:57:00,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:00,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141934954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:01,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:01,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:01,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745479818] [2021-06-05 13:57:01,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:01,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:01,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:01,556 INFO L87 Difference]: Start difference. First operand 133729 states and 494163 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:02,565 INFO L93 Difference]: Finished difference Result 134286 states and 495782 transitions. [2021-06-05 13:57:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:02,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:02,948 INFO L225 Difference]: With dead ends: 134286 [2021-06-05 13:57:02,948 INFO L226 Difference]: Without dead ends: 134256 [2021-06-05 13:57:02,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1031.9ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:57:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134256 states. [2021-06-05 13:57:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134256 to 133862. [2021-06-05 13:57:05,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133862 states, 133861 states have (on average 3.6949522265633754) internal successors, (494610), 133861 states have internal predecessors, (494610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133862 states to 133862 states and 494610 transitions. [2021-06-05 13:57:06,693 INFO L78 Accepts]: Start accepts. Automaton has 133862 states and 494610 transitions. Word has length 33 [2021-06-05 13:57:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:06,693 INFO L482 AbstractCegarLoop]: Abstraction has 133862 states and 494610 transitions. [2021-06-05 13:57:06,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 133862 states and 494610 transitions. [2021-06-05 13:57:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:07,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:07,032 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:07,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:07,234 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:07,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1180848474, now seen corresponding path program 142 times [2021-06-05 13:57:07,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:07,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358554515] [2021-06-05 13:57:07,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:07,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358554515] [2021-06-05 13:57:07,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358554515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:07,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388005533] [2021-06-05 13:57:07,333 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:07,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:07,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:07,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:07,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388005533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:07,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:07,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087961336] [2021-06-05 13:57:07,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:07,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:07,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:07,656 INFO L87 Difference]: Start difference. First operand 133862 states and 494610 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:09,511 INFO L93 Difference]: Finished difference Result 134087 states and 495235 transitions. [2021-06-05 13:57:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:09,940 INFO L225 Difference]: With dead ends: 134087 [2021-06-05 13:57:09,940 INFO L226 Difference]: Without dead ends: 134059 [2021-06-05 13:57:09,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:57:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134059 states. [2021-06-05 13:57:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134059 to 133901. [2021-06-05 13:57:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133901 states, 133900 states have (on average 3.6948319641523524) internal successors, (494738), 133900 states have internal predecessors, (494738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133901 states to 133901 states and 494738 transitions. [2021-06-05 13:57:12,954 INFO L78 Accepts]: Start accepts. Automaton has 133901 states and 494738 transitions. Word has length 33 [2021-06-05 13:57:12,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:12,954 INFO L482 AbstractCegarLoop]: Abstraction has 133901 states and 494738 transitions. [2021-06-05 13:57:12,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 133901 states and 494738 transitions. [2021-06-05 13:57:13,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:13,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:13,210 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:13,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 13:57:13,411 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash 886630802, now seen corresponding path program 143 times [2021-06-05 13:57:13,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:13,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671761668] [2021-06-05 13:57:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:13,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:13,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671761668] [2021-06-05 13:57:13,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671761668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:13,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106312511] [2021-06-05 13:57:13,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:13,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:13,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:13,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106312511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:13,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:13,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:13,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208886221] [2021-06-05 13:57:13,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:13,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:13,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:13,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:13,780 INFO L87 Difference]: Start difference. First operand 133901 states and 494738 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:14,513 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-06-05 13:57:15,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:15,505 INFO L93 Difference]: Finished difference Result 134211 states and 495550 transitions. [2021-06-05 13:57:15,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:15,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:15,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:15,905 INFO L225 Difference]: With dead ends: 134211 [2021-06-05 13:57:15,905 INFO L226 Difference]: Without dead ends: 134069 [2021-06-05 13:57:15,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 943.2ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2021-06-05 13:57:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133952. [2021-06-05 13:57:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133952 states, 133951 states have (on average 3.694612208942076) internal successors, (494897), 133951 states have internal predecessors, (494897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133952 states to 133952 states and 494897 transitions. [2021-06-05 13:57:19,026 INFO L78 Accepts]: Start accepts. Automaton has 133952 states and 494897 transitions. Word has length 33 [2021-06-05 13:57:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:19,027 INFO L482 AbstractCegarLoop]: Abstraction has 133952 states and 494897 transitions. [2021-06-05 13:57:19,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 133952 states and 494897 transitions. [2021-06-05 13:57:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:20,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:20,057 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:20,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:20,260 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:20,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:20,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1484293802, now seen corresponding path program 144 times [2021-06-05 13:57:20,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:20,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632035248] [2021-06-05 13:57:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:20,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:20,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632035248] [2021-06-05 13:57:20,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632035248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565794832] [2021-06-05 13:57:20,381 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:20,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:20,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:20,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:20,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565794832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:20,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:20,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:20,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359839643] [2021-06-05 13:57:20,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:20,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:20,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:20,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:20,651 INFO L87 Difference]: Start difference. First operand 133952 states and 494897 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:21,675 INFO L93 Difference]: Finished difference Result 134387 states and 496089 transitions. [2021-06-05 13:57:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:22,695 INFO L225 Difference]: With dead ends: 134387 [2021-06-05 13:57:22,696 INFO L226 Difference]: Without dead ends: 134277 [2021-06-05 13:57:22,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134277 states. [2021-06-05 13:57:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134277 to 134057. [2021-06-05 13:57:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134057 states, 134056 states have (on average 3.694254639852002) internal successors, (495237), 134056 states have internal predecessors, (495237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134057 states to 134057 states and 495237 transitions. [2021-06-05 13:57:26,344 INFO L78 Accepts]: Start accepts. Automaton has 134057 states and 495237 transitions. Word has length 33 [2021-06-05 13:57:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:26,344 INFO L482 AbstractCegarLoop]: Abstraction has 134057 states and 495237 transitions. [2021-06-05 13:57:26,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 134057 states and 495237 transitions. [2021-06-05 13:57:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:26,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:26,697 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:26,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:26,917 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash 828320282, now seen corresponding path program 145 times [2021-06-05 13:57:26,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:26,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405219423] [2021-06-05 13:57:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:27,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405219423] [2021-06-05 13:57:27,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405219423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671184804] [2021-06-05 13:57:27,041 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:27,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:27,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671184804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:27,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:27,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:27,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947965879] [2021-06-05 13:57:27,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:27,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:27,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:27,386 INFO L87 Difference]: Start difference. First operand 134057 states and 495237 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:29,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:29,243 INFO L93 Difference]: Finished difference Result 134490 states and 496428 transitions. [2021-06-05 13:57:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:57:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:29,975 INFO L225 Difference]: With dead ends: 134490 [2021-06-05 13:57:29,975 INFO L226 Difference]: Without dead ends: 134406 [2021-06-05 13:57:29,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:57:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134406 states. [2021-06-05 13:57:32,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134406 to 134109. [2021-06-05 13:57:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134109 states, 134108 states have (on average 3.694343365049065) internal successors, (495441), 134108 states have internal predecessors, (495441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134109 states to 134109 states and 495441 transitions. [2021-06-05 13:57:33,054 INFO L78 Accepts]: Start accepts. Automaton has 134109 states and 495441 transitions. Word has length 33 [2021-06-05 13:57:33,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:33,054 INFO L482 AbstractCegarLoop]: Abstraction has 134109 states and 495441 transitions. [2021-06-05 13:57:33,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:33,054 INFO L276 IsEmpty]: Start isEmpty. Operand 134109 states and 495441 transitions. [2021-06-05 13:57:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:33,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:33,322 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:33,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:33,522 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:33,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:33,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1915604274, now seen corresponding path program 146 times [2021-06-05 13:57:33,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:33,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828162608] [2021-06-05 13:57:33,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:33,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:33,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828162608] [2021-06-05 13:57:33,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828162608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598356583] [2021-06-05 13:57:33,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:33,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:57:33,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:33,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:33,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598356583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:33,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:33,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:33,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442496086] [2021-06-05 13:57:33,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:33,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:33,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:33,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:33,901 INFO L87 Difference]: Start difference. First operand 134109 states and 495441 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:35,552 INFO L93 Difference]: Finished difference Result 134427 states and 496277 transitions. [2021-06-05 13:57:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:57:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:35,961 INFO L225 Difference]: With dead ends: 134427 [2021-06-05 13:57:35,961 INFO L226 Difference]: Without dead ends: 134285 [2021-06-05 13:57:35,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:36,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134285 states. [2021-06-05 13:57:38,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134285 to 134133. [2021-06-05 13:57:38,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134133 states, 134132 states have (on average 3.694248948796708) internal successors, (495517), 134132 states have internal predecessors, (495517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134133 states to 134133 states and 495517 transitions. [2021-06-05 13:57:39,092 INFO L78 Accepts]: Start accepts. Automaton has 134133 states and 495517 transitions. Word has length 33 [2021-06-05 13:57:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:39,092 INFO L482 AbstractCegarLoop]: Abstraction has 134133 states and 495517 transitions. [2021-06-05 13:57:39,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 134133 states and 495517 transitions. [2021-06-05 13:57:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:40,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:40,058 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:40,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:40,258 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:40,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:40,259 INFO L82 PathProgramCache]: Analyzing trace with hash 8438418, now seen corresponding path program 147 times [2021-06-05 13:57:40,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:40,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865527223] [2021-06-05 13:57:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865527223] [2021-06-05 13:57:40,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865527223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655720962] [2021-06-05 13:57:40,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:40,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:57:40,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:40,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:40,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:40,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655720962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:40,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:40,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:40,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861057997] [2021-06-05 13:57:40,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:40,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:40,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:40,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:40,588 INFO L87 Difference]: Start difference. First operand 134133 states and 495517 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:41,656 INFO L93 Difference]: Finished difference Result 134488 states and 496453 transitions. [2021-06-05 13:57:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:41,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:42,675 INFO L225 Difference]: With dead ends: 134488 [2021-06-05 13:57:42,675 INFO L226 Difference]: Without dead ends: 134378 [2021-06-05 13:57:42,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:42,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134378 states. [2021-06-05 13:57:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134378 to 134238. [2021-06-05 13:57:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134238 states, 134237 states have (on average 3.6939815401118916) internal successors, (495869), 134237 states have internal predecessors, (495869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134238 states to 134238 states and 495869 transitions. [2021-06-05 13:57:45,768 INFO L78 Accepts]: Start accepts. Automaton has 134238 states and 495869 transitions. Word has length 33 [2021-06-05 13:57:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:45,768 INFO L482 AbstractCegarLoop]: Abstraction has 134238 states and 495869 transitions. [2021-06-05 13:57:45,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 134238 states and 495869 transitions. [2021-06-05 13:57:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:46,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:46,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:46,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 13:57:46,234 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1973914794, now seen corresponding path program 148 times [2021-06-05 13:57:46,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:46,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322037226] [2021-06-05 13:57:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:46,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322037226] [2021-06-05 13:57:46,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322037226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758042000] [2021-06-05 13:57:46,328 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:46,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:57:46,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:46,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:46,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758042000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:46,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:46,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:46,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519202045] [2021-06-05 13:57:46,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:46,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:46,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:46,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:46,578 INFO L87 Difference]: Start difference. First operand 134238 states and 495869 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:48,113 INFO L93 Difference]: Finished difference Result 134606 states and 496835 transitions. [2021-06-05 13:57:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:48,562 INFO L225 Difference]: With dead ends: 134606 [2021-06-05 13:57:48,562 INFO L226 Difference]: Without dead ends: 134470 [2021-06-05 13:57:48,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134470 states. [2021-06-05 13:57:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134470 to 134329. [2021-06-05 13:57:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134329 states, 134328 states have (on average 3.6937347388481925) internal successors, (496172), 134328 states have internal predecessors, (496172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134329 states to 134329 states and 496172 transitions. [2021-06-05 13:57:51,622 INFO L78 Accepts]: Start accepts. Automaton has 134329 states and 496172 transitions. Word has length 33 [2021-06-05 13:57:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:51,622 INFO L482 AbstractCegarLoop]: Abstraction has 134329 states and 496172 transitions. [2021-06-05 13:57:51,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 134329 states and 496172 transitions. [2021-06-05 13:57:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:51,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:51,883 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:52,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 13:57:52,084 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:52,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2137366930, now seen corresponding path program 149 times [2021-06-05 13:57:52,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:52,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285690098] [2021-06-05 13:57:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:52,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:52,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285690098] [2021-06-05 13:57:52,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285690098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:52,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041034833] [2021-06-05 13:57:52,210 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:52,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:57:52,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:52,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:52,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:53,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041034833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:53,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:53,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:53,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573257156] [2021-06-05 13:57:53,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:53,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:53,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:53,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:53,110 INFO L87 Difference]: Start difference. First operand 134329 states and 496172 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:57:54,199 INFO L93 Difference]: Finished difference Result 134895 states and 497770 transitions. [2021-06-05 13:57:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:57:54,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:57:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:57:54,601 INFO L225 Difference]: With dead ends: 134895 [2021-06-05 13:57:54,601 INFO L226 Difference]: Without dead ends: 134785 [2021-06-05 13:57:54,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:57:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134785 states. [2021-06-05 13:57:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134785 to 134598. [2021-06-05 13:57:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134598 states, 134597 states have (on average 3.692853481132566) internal successors, (497047), 134597 states have internal predecessors, (497047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134598 states to 134598 states and 497047 transitions. [2021-06-05 13:57:58,324 INFO L78 Accepts]: Start accepts. Automaton has 134598 states and 497047 transitions. Word has length 33 [2021-06-05 13:57:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:57:58,324 INFO L482 AbstractCegarLoop]: Abstraction has 134598 states and 497047 transitions. [2021-06-05 13:57:58,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:57:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 134598 states and 497047 transitions. [2021-06-05 13:57:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:57:58,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:57:58,608 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:57:58,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 13:57:58,809 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:57:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:57:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash 155013718, now seen corresponding path program 150 times [2021-06-05 13:57:58,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:57:58,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452782943] [2021-06-05 13:57:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:57:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:57:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:58,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:57:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452782943] [2021-06-05 13:57:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452782943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091032387] [2021-06-05 13:57:58,903 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:57:58,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 13:57:58,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:57:58,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:57:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:57:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:57:59,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091032387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:57:59,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:57:59,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:57:59,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747111300] [2021-06-05 13:57:59,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:57:59,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:57:59,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:57:59,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:57:59,169 INFO L87 Difference]: Start difference. First operand 134598 states and 497047 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:00,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:00,806 INFO L93 Difference]: Finished difference Result 135111 states and 498442 transitions. [2021-06-05 13:58:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:58:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:01,249 INFO L225 Difference]: With dead ends: 135111 [2021-06-05 13:58:01,249 INFO L226 Difference]: Without dead ends: 134975 [2021-06-05 13:58:01,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:01,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134975 states. [2021-06-05 13:58:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134975 to 134792. [2021-06-05 13:58:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134792 states, 134791 states have (on average 3.6920269157436327) internal successors, (497652), 134791 states have internal predecessors, (497652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134792 states to 134792 states and 497652 transitions. [2021-06-05 13:58:04,337 INFO L78 Accepts]: Start accepts. Automaton has 134792 states and 497652 transitions. Word has length 33 [2021-06-05 13:58:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:04,337 INFO L482 AbstractCegarLoop]: Abstraction has 134792 states and 497652 transitions. [2021-06-05 13:58:04,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 134792 states and 497652 transitions. [2021-06-05 13:58:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:04,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:04,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:04,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 13:58:04,801 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:04,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:04,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1775104342, now seen corresponding path program 151 times [2021-06-05 13:58:04,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:04,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158925024] [2021-06-05 13:58:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:04,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:04,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158925024] [2021-06-05 13:58:04,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158925024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:04,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094763990] [2021-06-05 13:58:04,922 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:04,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:04,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:05,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094763990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:05,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:05,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:05,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342112737] [2021-06-05 13:58:05,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:05,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:05,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:05,207 INFO L87 Difference]: Start difference. First operand 134792 states and 497652 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:05,803 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-05 13:58:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:06,893 INFO L93 Difference]: Finished difference Result 135221 states and 498845 transitions. [2021-06-05 13:58:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:58:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:07,290 INFO L225 Difference]: With dead ends: 135221 [2021-06-05 13:58:07,290 INFO L226 Difference]: Without dead ends: 135130 [2021-06-05 13:58:07,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 960.3ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:58:07,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135130 states. [2021-06-05 13:58:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135130 to 134844. [2021-06-05 13:58:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134844 states, 134843 states have (on average 3.6920270240205277) internal successors, (497844), 134843 states have internal predecessors, (497844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134844 states to 134844 states and 497844 transitions. [2021-06-05 13:58:11,055 INFO L78 Accepts]: Start accepts. Automaton has 134844 states and 497844 transitions. Word has length 33 [2021-06-05 13:58:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:11,055 INFO L482 AbstractCegarLoop]: Abstraction has 134844 states and 497844 transitions. [2021-06-05 13:58:11,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 134844 states and 497844 transitions. [2021-06-05 13:58:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:11,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:11,406 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:11,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:11,607 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1268459362, now seen corresponding path program 152 times [2021-06-05 13:58:11,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:11,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075218620] [2021-06-05 13:58:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:11,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:11,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075218620] [2021-06-05 13:58:11,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075218620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169252326] [2021-06-05 13:58:11,704 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:11,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:11,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:11,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169252326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:11,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:11,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:11,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207538244] [2021-06-05 13:58:11,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:11,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:11,984 INFO L87 Difference]: Start difference. First operand 134844 states and 497844 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:13,674 INFO L93 Difference]: Finished difference Result 135053 states and 498421 transitions. [2021-06-05 13:58:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:58:13,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:14,093 INFO L225 Difference]: With dead ends: 135053 [2021-06-05 13:58:14,093 INFO L226 Difference]: Without dead ends: 135025 [2021-06-05 13:58:14,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 406.9ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:14,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135025 states. [2021-06-05 13:58:16,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135025 to 134864. [2021-06-05 13:58:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134864 states, 134863 states have (on average 3.6919243973513862) internal successors, (497904), 134863 states have internal predecessors, (497904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134864 states to 134864 states and 497904 transitions. [2021-06-05 13:58:17,344 INFO L78 Accepts]: Start accepts. Automaton has 134864 states and 497904 transitions. Word has length 33 [2021-06-05 13:58:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:17,344 INFO L482 AbstractCegarLoop]: Abstraction has 134864 states and 497904 transitions. [2021-06-05 13:58:17,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 134864 states and 497904 transitions. [2021-06-05 13:58:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:18,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:18,290 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:18,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 13:58:18,491 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:18,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:18,491 INFO L82 PathProgramCache]: Analyzing trace with hash -959028658, now seen corresponding path program 153 times [2021-06-05 13:58:18,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:18,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539563298] [2021-06-05 13:58:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:18,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:18,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539563298] [2021-06-05 13:58:18,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539563298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89365729] [2021-06-05 13:58:18,677 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:18,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:58:18,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:18,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89365729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:18,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:18,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547062570] [2021-06-05 13:58:18,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:18,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:18,932 INFO L87 Difference]: Start difference. First operand 134864 states and 497904 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:19,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:19,996 INFO L93 Difference]: Finished difference Result 135170 states and 498704 transitions. [2021-06-05 13:58:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:58:19,996 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:21,071 INFO L225 Difference]: With dead ends: 135170 [2021-06-05 13:58:21,071 INFO L226 Difference]: Without dead ends: 135028 [2021-06-05 13:58:21,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135028 states. [2021-06-05 13:58:22,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135028 to 134868. [2021-06-05 13:58:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134868 states, 134867 states have (on average 3.691903875670105) internal successors, (497916), 134867 states have internal predecessors, (497916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134868 states to 134868 states and 497916 transitions. [2021-06-05 13:58:24,238 INFO L78 Accepts]: Start accepts. Automaton has 134868 states and 497916 transitions. Word has length 33 [2021-06-05 13:58:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:24,239 INFO L482 AbstractCegarLoop]: Abstraction has 134868 states and 497916 transitions. [2021-06-05 13:58:24,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 134868 states and 497916 transitions. [2021-06-05 13:58:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:24,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:24,519 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:24,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:24,719 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:24,719 INFO L82 PathProgramCache]: Analyzing trace with hash 965014034, now seen corresponding path program 154 times [2021-06-05 13:58:24,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:24,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991407576] [2021-06-05 13:58:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:24,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:24,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991407576] [2021-06-05 13:58:24,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991407576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:24,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380035107] [2021-06-05 13:58:24,813 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:24,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:58:24,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:25,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380035107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:25,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:25,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:25,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788981291] [2021-06-05 13:58:25,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:25,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:25,074 INFO L87 Difference]: Start difference. First operand 134868 states and 497916 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:26,758 INFO L93 Difference]: Finished difference Result 135436 states and 499523 transitions. [2021-06-05 13:58:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:58:26,759 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:27,185 INFO L225 Difference]: With dead ends: 135436 [2021-06-05 13:58:27,186 INFO L226 Difference]: Without dead ends: 135326 [2021-06-05 13:58:27,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:27,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135326 states. [2021-06-05 13:58:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135326 to 135008. [2021-06-05 13:58:29,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135008 states, 135007 states have (on average 3.6911123126948975) internal successors, (498326), 135007 states have internal predecessors, (498326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135008 states to 135008 states and 498326 transitions. [2021-06-05 13:58:30,272 INFO L78 Accepts]: Start accepts. Automaton has 135008 states and 498326 transitions. Word has length 33 [2021-06-05 13:58:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:30,272 INFO L482 AbstractCegarLoop]: Abstraction has 135008 states and 498326 transitions. [2021-06-05 13:58:30,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 135008 states and 498326 transitions. [2021-06-05 13:58:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:30,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:30,521 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:30,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:30,722 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:30,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:30,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1017339178, now seen corresponding path program 155 times [2021-06-05 13:58:30,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:30,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850355479] [2021-06-05 13:58:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:30,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:30,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850355479] [2021-06-05 13:58:30,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850355479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:30,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795813119] [2021-06-05 13:58:30,815 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:30,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 13:58:30,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:30,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:31,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795813119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:31,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:31,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:31,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658020733] [2021-06-05 13:58:31,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:31,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:31,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:31,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:31,799 INFO L87 Difference]: Start difference. First operand 135008 states and 498326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:32,804 INFO L93 Difference]: Finished difference Result 135409 states and 499417 transitions. [2021-06-05 13:58:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:58:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:33,190 INFO L225 Difference]: With dead ends: 135409 [2021-06-05 13:58:33,190 INFO L226 Difference]: Without dead ends: 135325 [2021-06-05 13:58:33,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:33,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135325 states. [2021-06-05 13:58:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135325 to 134976. [2021-06-05 13:58:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134976 states, 134975 states have (on average 3.6913057973698833) internal successors, (498234), 134975 states have internal predecessors, (498234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:36,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134976 states to 134976 states and 498234 transitions. [2021-06-05 13:58:36,955 INFO L78 Accepts]: Start accepts. Automaton has 134976 states and 498234 transitions. Word has length 33 [2021-06-05 13:58:36,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:36,955 INFO L482 AbstractCegarLoop]: Abstraction has 134976 states and 498234 transitions. [2021-06-05 13:58:36,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand 134976 states and 498234 transitions. [2021-06-05 13:58:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:37,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:37,237 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:37,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:37,441 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1160274146, now seen corresponding path program 156 times [2021-06-05 13:58:37,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:37,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852377456] [2021-06-05 13:58:37,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:37,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:37,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852377456] [2021-06-05 13:58:37,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852377456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:37,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384432061] [2021-06-05 13:58:37,547 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:37,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 13:58:37,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:37,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:37,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384432061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:37,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:37,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:37,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075175502] [2021-06-05 13:58:37,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:37,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:37,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:37,847 INFO L87 Difference]: Start difference. First operand 134976 states and 498234 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:39,521 INFO L93 Difference]: Finished difference Result 135181 states and 498843 transitions. [2021-06-05 13:58:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 13:58:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:39,972 INFO L225 Difference]: With dead ends: 135181 [2021-06-05 13:58:39,972 INFO L226 Difference]: Without dead ends: 135166 [2021-06-05 13:58:39,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 13:58:40,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135166 states. [2021-06-05 13:58:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135166 to 135012. [2021-06-05 13:58:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135012 states, 135011 states have (on average 3.6913362614898046) internal successors, (498371), 135011 states have internal predecessors, (498371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135012 states to 135012 states and 498371 transitions. [2021-06-05 13:58:43,033 INFO L78 Accepts]: Start accepts. Automaton has 135012 states and 498371 transitions. Word has length 33 [2021-06-05 13:58:43,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:43,033 INFO L482 AbstractCegarLoop]: Abstraction has 135012 states and 498371 transitions. [2021-06-05 13:58:43,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 135012 states and 498371 transitions. [2021-06-05 13:58:43,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:43,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:43,298 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:43,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 13:58:43,498 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:43,499 INFO L82 PathProgramCache]: Analyzing trace with hash 516165646, now seen corresponding path program 157 times [2021-06-05 13:58:43,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:43,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005754177] [2021-06-05 13:58:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:43,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:43,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005754177] [2021-06-05 13:58:43,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005754177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:43,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595936152] [2021-06-05 13:58:43,593 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:43,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:43,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595936152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:43,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:43,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:43,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483271060] [2021-06-05 13:58:43,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:43,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:43,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:43,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:43,854 INFO L87 Difference]: Start difference. First operand 135012 states and 498371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:44,513 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-06-05 13:58:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:45,482 INFO L93 Difference]: Finished difference Result 135441 states and 499607 transitions. [2021-06-05 13:58:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:58:45,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:45,870 INFO L225 Difference]: With dead ends: 135441 [2021-06-05 13:58:45,870 INFO L226 Difference]: Without dead ends: 135329 [2021-06-05 13:58:45,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 977.4ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135329 states. [2021-06-05 13:58:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135329 to 135120. [2021-06-05 13:58:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135120 states, 135119 states have (on average 3.6909094945936545) internal successors, (498712), 135119 states have internal predecessors, (498712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135120 states to 135120 states and 498712 transitions. [2021-06-05 13:58:49,722 INFO L78 Accepts]: Start accepts. Automaton has 135120 states and 498712 transitions. Word has length 33 [2021-06-05 13:58:49,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:49,722 INFO L482 AbstractCegarLoop]: Abstraction has 135120 states and 498712 transitions. [2021-06-05 13:58:49,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:49,723 INFO L276 IsEmpty]: Start isEmpty. Operand 135120 states and 498712 transitions. [2021-06-05 13:58:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:50,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:50,111 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:50,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:50,311 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1371713326, now seen corresponding path program 158 times [2021-06-05 13:58:50,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:50,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189267283] [2021-06-05 13:58:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:50,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:50,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189267283] [2021-06-05 13:58:50,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189267283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:50,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431255284] [2021-06-05 13:58:50,414 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:50,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:58:50,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:50,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:50,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431255284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:50,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:50,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:50,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481951978] [2021-06-05 13:58:50,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:50,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:50,691 INFO L87 Difference]: Start difference. First operand 135120 states and 498712 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:52,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:52,449 INFO L93 Difference]: Finished difference Result 135711 states and 500369 transitions. [2021-06-05 13:58:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:58:52,450 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:52,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:52,862 INFO L225 Difference]: With dead ends: 135711 [2021-06-05 13:58:52,862 INFO L226 Difference]: Without dead ends: 135631 [2021-06-05 13:58:52,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135631 states. [2021-06-05 13:58:55,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135631 to 135275. [2021-06-05 13:58:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135275 states, 135274 states have (on average 3.690443100669752) internal successors, (499221), 135274 states have internal predecessors, (499221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:55,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135275 states to 135275 states and 499221 transitions. [2021-06-05 13:58:55,983 INFO L78 Accepts]: Start accepts. Automaton has 135275 states and 499221 transitions. Word has length 33 [2021-06-05 13:58:55,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:58:55,983 INFO L482 AbstractCegarLoop]: Abstraction has 135275 states and 499221 transitions. [2021-06-05 13:58:55,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 135275 states and 499221 transitions. [2021-06-05 13:58:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:58:56,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:58:56,236 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:58:56,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 13:58:56,436 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:58:56,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:58:56,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1177029994, now seen corresponding path program 159 times [2021-06-05 13:58:56,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:58:56,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493107796] [2021-06-05 13:58:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:58:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:58:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:58:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493107796] [2021-06-05 13:58:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493107796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499821866] [2021-06-05 13:58:56,534 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:58:56,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 13:58:56,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:58:56,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:58:56,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:58:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:58:56,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499821866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:58:56,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:58:56,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:58:56,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621414295] [2021-06-05 13:58:56,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:58:56,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:58:56,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:58:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:58:56,813 INFO L87 Difference]: Start difference. First operand 135275 states and 499221 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:58:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:58:58,508 INFO L93 Difference]: Finished difference Result 135676 states and 500356 transitions. [2021-06-05 13:58:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 13:58:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:58:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:58:58,921 INFO L225 Difference]: With dead ends: 135676 [2021-06-05 13:58:58,921 INFO L226 Difference]: Without dead ends: 135646 [2021-06-05 13:58:58,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 13:58:59,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135646 states. [2021-06-05 13:59:01,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135646 to 135346. [2021-06-05 13:59:01,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135346 states, 135345 states have (on average 3.690509438841479) internal successors, (499492), 135345 states have internal predecessors, (499492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135346 states to 135346 states and 499492 transitions. [2021-06-05 13:59:02,549 INFO L78 Accepts]: Start accepts. Automaton has 135346 states and 499492 transitions. Word has length 33 [2021-06-05 13:59:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:02,550 INFO L482 AbstractCegarLoop]: Abstraction has 135346 states and 499492 transitions. [2021-06-05 13:59:02,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:02,550 INFO L276 IsEmpty]: Start isEmpty. Operand 135346 states and 499492 transitions. [2021-06-05 13:59:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:02,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:02,968 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:03,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:03,168 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:03,169 INFO L82 PathProgramCache]: Analyzing trace with hash -588948574, now seen corresponding path program 160 times [2021-06-05 13:59:03,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:03,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745319904] [2021-06-05 13:59:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:03,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745319904] [2021-06-05 13:59:03,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745319904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:03,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948309025] [2021-06-05 13:59:03,284 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:03,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:03,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:03,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:03,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948309025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:03,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:03,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:59:03,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020072468] [2021-06-05 13:59:03,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:59:03,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:03,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:59:03,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:03,537 INFO L87 Difference]: Start difference. First operand 135346 states and 499492 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:04,477 INFO L93 Difference]: Finished difference Result 136007 states and 501349 transitions. [2021-06-05 13:59:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:59:04,478 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:05,846 INFO L225 Difference]: With dead ends: 136007 [2021-06-05 13:59:05,847 INFO L226 Difference]: Without dead ends: 135825 [2021-06-05 13:59:05,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135825 states. [2021-06-05 13:59:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135825 to 135578. [2021-06-05 13:59:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135578 states, 135577 states have (on average 3.6892393252542837) internal successors, (500176), 135577 states have internal predecessors, (500176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135578 states to 135578 states and 500176 transitions. [2021-06-05 13:59:09,617 INFO L78 Accepts]: Start accepts. Automaton has 135578 states and 500176 transitions. Word has length 33 [2021-06-05 13:59:09,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:09,617 INFO L482 AbstractCegarLoop]: Abstraction has 135578 states and 500176 transitions. [2021-06-05 13:59:09,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:09,617 INFO L276 IsEmpty]: Start isEmpty. Operand 135578 states and 500176 transitions. [2021-06-05 13:59:09,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:09,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:09,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:10,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 13:59:10,098 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:10,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1267056682, now seen corresponding path program 161 times [2021-06-05 13:59:10,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:10,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517690001] [2021-06-05 13:59:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:10,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:10,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517690001] [2021-06-05 13:59:10,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517690001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:10,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698196200] [2021-06-05 13:59:10,191 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:10,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:59:10,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:10,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:10,502 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:10,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698196200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:10,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:10,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:59:10,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526628235] [2021-06-05 13:59:10,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:59:10,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:10,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:59:10,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:10,503 INFO L87 Difference]: Start difference. First operand 135578 states and 500176 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:12,179 INFO L93 Difference]: Finished difference Result 136135 states and 501711 transitions. [2021-06-05 13:59:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:59:12,179 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:12,623 INFO L225 Difference]: With dead ends: 136135 [2021-06-05 13:59:12,623 INFO L226 Difference]: Without dead ends: 136008 [2021-06-05 13:59:12,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 13:59:12,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136008 states. [2021-06-05 13:59:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136008 to 135568. [2021-06-05 13:59:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135568 states, 135567 states have (on average 3.6892237786481963) internal successors, (500137), 135567 states have internal predecessors, (500137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135568 states to 135568 states and 500137 transitions. [2021-06-05 13:59:15,634 INFO L78 Accepts]: Start accepts. Automaton has 135568 states and 500137 transitions. Word has length 33 [2021-06-05 13:59:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:15,635 INFO L482 AbstractCegarLoop]: Abstraction has 135568 states and 500137 transitions. [2021-06-05 13:59:15,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 135568 states and 500137 transitions. [2021-06-05 13:59:15,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:15,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:15,896 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:16,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 13:59:16,097 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:16,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:16,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1810631706, now seen corresponding path program 162 times [2021-06-05 13:59:16,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:16,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961144947] [2021-06-05 13:59:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:16,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:16,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961144947] [2021-06-05 13:59:16,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961144947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:16,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736459822] [2021-06-05 13:59:16,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:16,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 13:59:16,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:17,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736459822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:17,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:17,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 13:59:17,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966090033] [2021-06-05 13:59:17,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:59:17,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:59:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:17,073 INFO L87 Difference]: Start difference. First operand 135568 states and 500137 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:18,157 INFO L93 Difference]: Finished difference Result 135962 states and 501194 transitions. [2021-06-05 13:59:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:18,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:18,559 INFO L225 Difference]: With dead ends: 135962 [2021-06-05 13:59:18,559 INFO L226 Difference]: Without dead ends: 135878 [2021-06-05 13:59:18,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 961.2ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135878 states. [2021-06-05 13:59:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135878 to 135615. [2021-06-05 13:59:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135615 states, 135614 states have (on average 3.689235624640524) internal successors, (500312), 135614 states have internal predecessors, (500312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:22,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135615 states to 135615 states and 500312 transitions. [2021-06-05 13:59:22,321 INFO L78 Accepts]: Start accepts. Automaton has 135615 states and 500312 transitions. Word has length 33 [2021-06-05 13:59:22,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:22,321 INFO L482 AbstractCegarLoop]: Abstraction has 135615 states and 500312 transitions. [2021-06-05 13:59:22,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:22,321 INFO L276 IsEmpty]: Start isEmpty. Operand 135615 states and 500312 transitions. [2021-06-05 13:59:22,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:22,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:22,690 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:22,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:22,891 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:22,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:22,891 INFO L82 PathProgramCache]: Analyzing trace with hash 654578334, now seen corresponding path program 163 times [2021-06-05 13:59:22,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:22,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147669623] [2021-06-05 13:59:22,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:59:22,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:22,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147669623] [2021-06-05 13:59:22,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147669623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:22,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124254813] [2021-06-05 13:59:22,978 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:23,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:23,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124254813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:23,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:23,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 13:59:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816927247] [2021-06-05 13:59:23,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:59:23,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:23,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:59:23,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:23,251 INFO L87 Difference]: Start difference. First operand 135615 states and 500312 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:24,985 INFO L93 Difference]: Finished difference Result 136030 states and 501487 transitions. [2021-06-05 13:59:24,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 13:59:24,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:24,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:25,426 INFO L225 Difference]: With dead ends: 136030 [2021-06-05 13:59:25,426 INFO L226 Difference]: Without dead ends: 136000 [2021-06-05 13:59:25,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:25,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136000 states. [2021-06-05 13:59:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136000 to 135676. [2021-06-05 13:59:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135676 states, 135675 states have (on average 3.689272157729869) internal successors, (500542), 135675 states have internal predecessors, (500542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135676 states to 135676 states and 500542 transitions. [2021-06-05 13:59:28,617 INFO L78 Accepts]: Start accepts. Automaton has 135676 states and 500542 transitions. Word has length 33 [2021-06-05 13:59:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:28,617 INFO L482 AbstractCegarLoop]: Abstraction has 135676 states and 500542 transitions. [2021-06-05 13:59:28,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:28,617 INFO L276 IsEmpty]: Start isEmpty. Operand 135676 states and 500542 transitions. [2021-06-05 13:59:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:28,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:28,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:29,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:29,078 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:29,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:29,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1745873050, now seen corresponding path program 164 times [2021-06-05 13:59:29,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:29,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861110193] [2021-06-05 13:59:29,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:29,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:29,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861110193] [2021-06-05 13:59:29,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861110193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:29,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739060221] [2021-06-05 13:59:29,165 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:29,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 13:59:29,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:29,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:29,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739060221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:29,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:29,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:59:29,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598079709] [2021-06-05 13:59:29,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:59:29,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:29,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:59:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:29,527 INFO L87 Difference]: Start difference. First operand 135676 states and 500542 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:31,016 INFO L93 Difference]: Finished difference Result 135970 states and 501235 transitions. [2021-06-05 13:59:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:31,412 INFO L225 Difference]: With dead ends: 135970 [2021-06-05 13:59:31,412 INFO L226 Difference]: Without dead ends: 135812 [2021-06-05 13:59:31,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135812 states. [2021-06-05 13:59:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135812 to 135650. [2021-06-05 13:59:34,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135650 states, 135649 states have (on average 3.6883869398226303) internal successors, (500326), 135649 states have internal predecessors, (500326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135650 states to 135650 states and 500326 transitions. [2021-06-05 13:59:34,500 INFO L78 Accepts]: Start accepts. Automaton has 135650 states and 500326 transitions. Word has length 33 [2021-06-05 13:59:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:34,500 INFO L482 AbstractCegarLoop]: Abstraction has 135650 states and 500326 transitions. [2021-06-05 13:59:34,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 135650 states and 500326 transitions. [2021-06-05 13:59:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:35,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:35,475 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:35,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 13:59:35,689 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:35,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1141614370, now seen corresponding path program 165 times [2021-06-05 13:59:35,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:35,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336990394] [2021-06-05 13:59:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:35,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336990394] [2021-06-05 13:59:35,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336990394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:35,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508610284] [2021-06-05 13:59:35,796 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:35,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 13:59:35,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:35,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:36,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508610284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:36,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:36,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:59:36,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053803879] [2021-06-05 13:59:36,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:59:36,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:59:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:36,053 INFO L87 Difference]: Start difference. First operand 135650 states and 500326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:37,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:37,187 INFO L93 Difference]: Finished difference Result 136261 states and 501957 transitions. [2021-06-05 13:59:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:37,188 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:37,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:38,247 INFO L225 Difference]: With dead ends: 136261 [2021-06-05 13:59:38,247 INFO L226 Difference]: Without dead ends: 136063 [2021-06-05 13:59:38,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136063 states. [2021-06-05 13:59:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136063 to 135852. [2021-06-05 13:59:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135852 states, 135851 states have (on average 3.6868628129347596) internal successors, (500864), 135851 states have internal predecessors, (500864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135852 states to 135852 states and 500864 transitions. [2021-06-05 13:59:41,443 INFO L78 Accepts]: Start accepts. Automaton has 135852 states and 500864 transitions. Word has length 33 [2021-06-05 13:59:41,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:41,443 INFO L482 AbstractCegarLoop]: Abstraction has 135852 states and 500864 transitions. [2021-06-05 13:59:41,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:41,443 INFO L276 IsEmpty]: Start isEmpty. Operand 135852 states and 500864 transitions. [2021-06-05 13:59:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:41,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:41,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:41,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:41,895 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1527145246, now seen corresponding path program 166 times [2021-06-05 13:59:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:41,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327653393] [2021-06-05 13:59:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:41,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:41,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327653393] [2021-06-05 13:59:41,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327653393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:41,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056718465] [2021-06-05 13:59:41,976 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:42,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 13:59:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:42,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:42,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056718465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:42,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:42,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 13:59:42,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713407910] [2021-06-05 13:59:42,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:59:42,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:59:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:42,227 INFO L87 Difference]: Start difference. First operand 135852 states and 500864 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:43,692 INFO L93 Difference]: Finished difference Result 136405 states and 502442 transitions. [2021-06-05 13:59:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:59:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:44,118 INFO L225 Difference]: With dead ends: 136405 [2021-06-05 13:59:44,118 INFO L226 Difference]: Without dead ends: 136263 [2021-06-05 13:59:44,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 293.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136263 states. [2021-06-05 13:59:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136263 to 136063. [2021-06-05 13:59:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136063 states, 136062 states have (on average 3.6861283826490863) internal successors, (501542), 136062 states have internal predecessors, (501542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136063 states to 136063 states and 501542 transitions. [2021-06-05 13:59:47,146 INFO L78 Accepts]: Start accepts. Automaton has 136063 states and 501542 transitions. Word has length 33 [2021-06-05 13:59:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:47,146 INFO L482 AbstractCegarLoop]: Abstraction has 136063 states and 501542 transitions. [2021-06-05 13:59:47,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 136063 states and 501542 transitions. [2021-06-05 13:59:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:47,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:47,413 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:47,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:47,614 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:47,614 INFO L82 PathProgramCache]: Analyzing trace with hash 966556586, now seen corresponding path program 167 times [2021-06-05 13:59:47,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:47,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671014952] [2021-06-05 13:59:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:48,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:48,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671014952] [2021-06-05 13:59:48,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671014952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59062344] [2021-06-05 13:59:48,340 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:48,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 13:59:48,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:48,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59062344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:48,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:48,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 13:59:48,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979779498] [2021-06-05 13:59:48,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 13:59:48,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:48,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 13:59:48,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 13:59:48,688 INFO L87 Difference]: Start difference. First operand 136063 states and 501542 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:49,694 INFO L93 Difference]: Finished difference Result 136463 states and 502600 transitions. [2021-06-05 13:59:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 13:59:49,694 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:50,078 INFO L225 Difference]: With dead ends: 136463 [2021-06-05 13:59:50,078 INFO L226 Difference]: Without dead ends: 136357 [2021-06-05 13:59:50,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 13:59:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136357 states. [2021-06-05 13:59:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136357 to 136175. [2021-06-05 13:59:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136175 states, 136174 states have (on average 3.6854759352005524) internal successors, (501866), 136174 states have internal predecessors, (501866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:53,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136175 states to 136175 states and 501866 transitions. [2021-06-05 13:59:53,595 INFO L78 Accepts]: Start accepts. Automaton has 136175 states and 501866 transitions. Word has length 33 [2021-06-05 13:59:53,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:59:53,595 INFO L482 AbstractCegarLoop]: Abstraction has 136175 states and 501866 transitions. [2021-06-05 13:59:53,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 136175 states and 501866 transitions. [2021-06-05 13:59:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 13:59:53,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:59:53,877 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:59:54,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:54,077 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:59:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:59:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1161239918, now seen corresponding path program 168 times [2021-06-05 13:59:54,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:59:54,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534612689] [2021-06-05 13:59:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:59:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:59:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:54,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:59:54,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534612689] [2021-06-05 13:59:54,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534612689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:54,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217364316] [2021-06-05 13:59:54,172 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 13:59:54,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 13:59:54,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 13:59:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 13:59:54,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 13:59:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:59:54,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217364316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 13:59:54,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 13:59:54,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 13:59:54,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988066644] [2021-06-05 13:59:54,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 13:59:54,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:59:54,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 13:59:54,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 13:59:54,426 INFO L87 Difference]: Start difference. First operand 136175 states and 501866 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:59:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:59:56,381 INFO L93 Difference]: Finished difference Result 136837 states and 503693 transitions. [2021-06-05 13:59:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 13:59:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 13:59:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:59:57,146 INFO L225 Difference]: With dead ends: 136837 [2021-06-05 13:59:57,146 INFO L226 Difference]: Without dead ends: 136710 [2021-06-05 13:59:57,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 13:59:57,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136710 states. [2021-06-05 13:59:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136710 to 136135. [2021-06-05 13:59:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136135 states, 136134 states have (on average 3.686360497744869) internal successors, (501839), 136134 states have internal predecessors, (501839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136135 states to 136135 states and 501839 transitions. [2021-06-05 14:00:00,371 INFO L78 Accepts]: Start accepts. Automaton has 136135 states and 501839 transitions. Word has length 33 [2021-06-05 14:00:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:00,371 INFO L482 AbstractCegarLoop]: Abstraction has 136135 states and 501839 transitions. [2021-06-05 14:00:00,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 136135 states and 501839 transitions. [2021-06-05 14:00:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:00,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:00,629 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:00,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 14:00:00,830 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:00,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:00,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1704814942, now seen corresponding path program 169 times [2021-06-05 14:00:00,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:00,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486651138] [2021-06-05 14:00:00,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:00,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:00,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486651138] [2021-06-05 14:00:00,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486651138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:00,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412086359] [2021-06-05 14:00:00,913 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:00,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412086359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:01,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:01,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:01,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619970963] [2021-06-05 14:00:01,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:01,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:01,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:01,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:01,169 INFO L87 Difference]: Start difference. First operand 136135 states and 501839 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:02,821 INFO L93 Difference]: Finished difference Result 136552 states and 502951 transitions. [2021-06-05 14:00:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:03,239 INFO L225 Difference]: With dead ends: 136552 [2021-06-05 14:00:03,239 INFO L226 Difference]: Without dead ends: 136408 [2021-06-05 14:00:03,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136408 states. [2021-06-05 14:00:05,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136408 to 136224. [2021-06-05 14:00:06,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136224 states, 136223 states have (on average 3.6858460025105892) internal successors, (502097), 136223 states have internal predecessors, (502097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136224 states to 136224 states and 502097 transitions. [2021-06-05 14:00:06,562 INFO L78 Accepts]: Start accepts. Automaton has 136224 states and 502097 transitions. Word has length 33 [2021-06-05 14:00:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:06,562 INFO L482 AbstractCegarLoop]: Abstraction has 136224 states and 502097 transitions. [2021-06-05 14:00:06,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 136224 states and 502097 transitions. [2021-06-05 14:00:07,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:07,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:07,670 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:07,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:07,871 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:07,871 INFO L82 PathProgramCache]: Analyzing trace with hash 548761570, now seen corresponding path program 170 times [2021-06-05 14:00:07,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:07,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787896249] [2021-06-05 14:00:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:00:07,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:07,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787896249] [2021-06-05 14:00:07,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787896249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:07,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235382487] [2021-06-05 14:00:07,959 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:07,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:07,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:07,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:07,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:08,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235382487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:08,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:08,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:08,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479167424] [2021-06-05 14:00:08,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:08,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:08,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:08,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:08,216 INFO L87 Difference]: Start difference. First operand 136224 states and 502097 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:09,340 INFO L93 Difference]: Finished difference Result 136817 states and 503721 transitions. [2021-06-05 14:00:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:09,341 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:10,519 INFO L225 Difference]: With dead ends: 136817 [2021-06-05 14:00:10,519 INFO L226 Difference]: Without dead ends: 136702 [2021-06-05 14:00:10,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136702 states. [2021-06-05 14:00:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136702 to 136321. [2021-06-05 14:00:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136321 states, 136320 states have (on average 3.68581279342723) internal successors, (502450), 136320 states have internal predecessors, (502450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136321 states to 136321 states and 502450 transitions. [2021-06-05 14:00:14,027 INFO L78 Accepts]: Start accepts. Automaton has 136321 states and 502450 transitions. Word has length 33 [2021-06-05 14:00:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:14,027 INFO L482 AbstractCegarLoop]: Abstraction has 136321 states and 502450 transitions. [2021-06-05 14:00:14,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 136321 states and 502450 transitions. [2021-06-05 14:00:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:14,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:14,311 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:14,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 14:00:14,512 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:14,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:14,512 INFO L82 PathProgramCache]: Analyzing trace with hash 308801818, now seen corresponding path program 171 times [2021-06-05 14:00:14,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:14,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395691264] [2021-06-05 14:00:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395691264] [2021-06-05 14:00:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395691264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360883236] [2021-06-05 14:00:14,600 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:14,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:14,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:14,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:14,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360883236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:14,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:14,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:14,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894095816] [2021-06-05 14:00:14,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:14,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:14,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:14,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:14,858 INFO L87 Difference]: Start difference. First operand 136321 states and 502450 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:16,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:16,421 INFO L93 Difference]: Finished difference Result 136671 states and 503372 transitions. [2021-06-05 14:00:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:16,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:16,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:16,886 INFO L225 Difference]: With dead ends: 136671 [2021-06-05 14:00:16,886 INFO L226 Difference]: Without dead ends: 136497 [2021-06-05 14:00:16,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136497 states. [2021-06-05 14:00:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136497 to 136433. [2021-06-05 14:00:19,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136433 states, 136432 states have (on average 3.6851911574997067) internal successors, (502778), 136432 states have internal predecessors, (502778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136433 states to 136433 states and 502778 transitions. [2021-06-05 14:00:20,381 INFO L78 Accepts]: Start accepts. Automaton has 136433 states and 502778 transitions. Word has length 33 [2021-06-05 14:00:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:20,381 INFO L482 AbstractCegarLoop]: Abstraction has 136433 states and 502778 transitions. [2021-06-05 14:00:20,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 136433 states and 502778 transitions. [2021-06-05 14:00:20,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:20,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:20,662 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:20,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 14:00:20,863 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1656613022, now seen corresponding path program 172 times [2021-06-05 14:00:20,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:20,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436024522] [2021-06-05 14:00:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:21,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:21,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436024522] [2021-06-05 14:00:21,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436024522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:21,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302349999] [2021-06-05 14:00:21,682 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:21,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:00:21,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:21,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:21,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:22,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302349999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:22,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:22,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:22,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813674117] [2021-06-05 14:00:22,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:22,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:22,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:22,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:22,017 INFO L87 Difference]: Start difference. First operand 136433 states and 502778 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:23,141 INFO L93 Difference]: Finished difference Result 136787 states and 503684 transitions. [2021-06-05 14:00:23,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:24,120 INFO L225 Difference]: With dead ends: 136787 [2021-06-05 14:00:24,120 INFO L226 Difference]: Without dead ends: 136633 [2021-06-05 14:00:24,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 351.8ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:24,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136633 states. [2021-06-05 14:00:26,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136633 to 136417. [2021-06-05 14:00:26,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136417 states, 136416 states have (on average 3.6851322425521933) internal successors, (502711), 136416 states have internal predecessors, (502711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136417 states to 136417 states and 502711 transitions. [2021-06-05 14:00:27,551 INFO L78 Accepts]: Start accepts. Automaton has 136417 states and 502711 transitions. Word has length 33 [2021-06-05 14:00:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:27,551 INFO L482 AbstractCegarLoop]: Abstraction has 136417 states and 502711 transitions. [2021-06-05 14:00:27,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:27,552 INFO L276 IsEmpty]: Start isEmpty. Operand 136417 states and 502711 transitions. [2021-06-05 14:00:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:27,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:27,849 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:28,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:28,049 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:28,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:28,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1189214166, now seen corresponding path program 173 times [2021-06-05 14:00:28,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:28,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123000442] [2021-06-05 14:00:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:28,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:28,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123000442] [2021-06-05 14:00:28,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123000442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232614040] [2021-06-05 14:00:28,151 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:28,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 14:00:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:28,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:28,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232614040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:28,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:28,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:28,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436836509] [2021-06-05 14:00:28,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:28,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:28,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:28,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:28,398 INFO L87 Difference]: Start difference. First operand 136417 states and 502711 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:30,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:30,105 INFO L93 Difference]: Finished difference Result 137004 states and 504307 transitions. [2021-06-05 14:00:30,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:30,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:30,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:30,594 INFO L225 Difference]: With dead ends: 137004 [2021-06-05 14:00:30,595 INFO L226 Difference]: Without dead ends: 136877 [2021-06-05 14:00:30,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136877 states. [2021-06-05 14:00:33,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136877 to 136498. [2021-06-05 14:00:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136498 states, 136497 states have (on average 3.6851652417269243) internal successors, (503014), 136497 states have internal predecessors, (503014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 503014 transitions. [2021-06-05 14:00:33,936 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 503014 transitions. Word has length 33 [2021-06-05 14:00:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:33,936 INFO L482 AbstractCegarLoop]: Abstraction has 136498 states and 503014 transitions. [2021-06-05 14:00:33,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:33,936 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 503014 transitions. [2021-06-05 14:00:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:34,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:34,218 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:34,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 14:00:34,419 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:34,419 INFO L82 PathProgramCache]: Analyzing trace with hash -323997470, now seen corresponding path program 174 times [2021-06-05 14:00:34,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:34,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496986301] [2021-06-05 14:00:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:00:34,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:34,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496986301] [2021-06-05 14:00:34,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496986301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:34,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272119845] [2021-06-05 14:00:34,512 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:34,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:00:34,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:34,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:34,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:35,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272119845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:35,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:35,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:35,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227995517] [2021-06-05 14:00:35,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:35,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:35,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:35,475 INFO L87 Difference]: Start difference. First operand 136498 states and 503014 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:36,583 INFO L93 Difference]: Finished difference Result 137151 states and 504800 transitions. [2021-06-05 14:00:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:36,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:37,020 INFO L225 Difference]: With dead ends: 137151 [2021-06-05 14:00:37,020 INFO L226 Difference]: Without dead ends: 137008 [2021-06-05 14:00:37,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1001.6ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137008 states. [2021-06-05 14:00:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137008 to 136605. [2021-06-05 14:00:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136605 states, 136604 states have (on average 3.685111709759597) internal successors, (503401), 136604 states have internal predecessors, (503401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136605 states to 136605 states and 503401 transitions. [2021-06-05 14:00:41,258 INFO L78 Accepts]: Start accepts. Automaton has 136605 states and 503401 transitions. Word has length 33 [2021-06-05 14:00:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:41,258 INFO L482 AbstractCegarLoop]: Abstraction has 136605 states and 503401 transitions. [2021-06-05 14:00:41,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 136605 states and 503401 transitions. [2021-06-05 14:00:41,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:41,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:41,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:41,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:41,758 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash 740825498, now seen corresponding path program 175 times [2021-06-05 14:00:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:41,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216491213] [2021-06-05 14:00:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:41,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:41,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216491213] [2021-06-05 14:00:41,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216491213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:41,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255221825] [2021-06-05 14:00:41,846 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:41,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:42,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255221825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:42,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:42,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:42,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199269239] [2021-06-05 14:00:42,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:42,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:42,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:42,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:42,087 INFO L87 Difference]: Start difference. First operand 136605 states and 503401 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:43,774 INFO L93 Difference]: Finished difference Result 137345 states and 505531 transitions. [2021-06-05 14:00:43,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:44,256 INFO L225 Difference]: With dead ends: 137345 [2021-06-05 14:00:44,256 INFO L226 Difference]: Without dead ends: 137202 [2021-06-05 14:00:44,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:44,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137202 states. [2021-06-05 14:00:46,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137202 to 136759. [2021-06-05 14:00:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136759 states, 136758 states have (on average 3.6850348791295575) internal successors, (503958), 136758 states have internal predecessors, (503958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136759 states to 136759 states and 503958 transitions. [2021-06-05 14:00:47,531 INFO L78 Accepts]: Start accepts. Automaton has 136759 states and 503958 transitions. Word has length 33 [2021-06-05 14:00:47,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:47,531 INFO L482 AbstractCegarLoop]: Abstraction has 136759 states and 503958 transitions. [2021-06-05 14:00:47,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 136759 states and 503958 transitions. [2021-06-05 14:00:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:47,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:47,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:48,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 14:00:48,008 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:48,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:48,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2124902626, now seen corresponding path program 176 times [2021-06-05 14:00:48,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:48,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279584874] [2021-06-05 14:00:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:48,682 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 14:00:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:48,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:48,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279584874] [2021-06-05 14:00:48,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279584874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:48,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573908551] [2021-06-05 14:00:48,810 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:48,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:00:48,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:48,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:48,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:49,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573908551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:49,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:49,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:00:49,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919901157] [2021-06-05 14:00:49,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:00:49,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:49,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:00:49,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:00:49,119 INFO L87 Difference]: Start difference. First operand 136759 states and 503958 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:50,126 INFO L93 Difference]: Finished difference Result 137461 states and 505914 transitions. [2021-06-05 14:00:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:00:50,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:50,560 INFO L225 Difference]: With dead ends: 137461 [2021-06-05 14:00:50,560 INFO L226 Difference]: Without dead ends: 137356 [2021-06-05 14:00:50,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1027.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:00:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137356 states. [2021-06-05 14:00:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137356 to 136882. [2021-06-05 14:00:54,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136882 states, 136881 states have (on average 3.685040290471285) internal successors, (504412), 136881 states have internal predecessors, (504412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:55,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136882 states to 136882 states and 504412 transitions. [2021-06-05 14:00:55,193 INFO L78 Accepts]: Start accepts. Automaton has 136882 states and 504412 transitions. Word has length 33 [2021-06-05 14:00:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:00:55,194 INFO L482 AbstractCegarLoop]: Abstraction has 136882 states and 504412 transitions. [2021-06-05 14:00:55,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 136882 states and 504412 transitions. [2021-06-05 14:00:55,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:00:55,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:00:55,628 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:00:55,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:55,828 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:00:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:00:55,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1248276962, now seen corresponding path program 177 times [2021-06-05 14:00:55,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:00:55,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840899659] [2021-06-05 14:00:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:00:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:00:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:55,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:00:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840899659] [2021-06-05 14:00:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840899659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:55,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295743136] [2021-06-05 14:00:55,936 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:00:55,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:00:55,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:00:55,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:00:55,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:00:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:00:56,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295743136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:00:56,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:00:56,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 14:00:56,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685142844] [2021-06-05 14:00:56,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:00:56,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:00:56,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:00:56,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:00:56,207 INFO L87 Difference]: Start difference. First operand 136882 states and 504412 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:00:58,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:00:58,080 INFO L93 Difference]: Finished difference Result 138201 states and 508135 transitions. [2021-06-05 14:00:58,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:00:58,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:00:58,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:00:58,546 INFO L225 Difference]: With dead ends: 138201 [2021-06-05 14:00:58,547 INFO L226 Difference]: Without dead ends: 138065 [2021-06-05 14:00:58,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:00:58,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138065 states. [2021-06-05 14:01:01,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138065 to 136923. [2021-06-05 14:01:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136923 states, 136922 states have (on average 3.6860110135697695) internal successors, (504696), 136922 states have internal predecessors, (504696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136923 states to 136923 states and 504696 transitions. [2021-06-05 14:01:02,080 INFO L78 Accepts]: Start accepts. Automaton has 136923 states and 504696 transitions. Word has length 33 [2021-06-05 14:01:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:02,080 INFO L482 AbstractCegarLoop]: Abstraction has 136923 states and 504696 transitions. [2021-06-05 14:01:02,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 136923 states and 504696 transitions. [2021-06-05 14:01:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:02,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:02,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:02,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:02,569 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:02,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:02,569 INFO L82 PathProgramCache]: Analyzing trace with hash -960276966, now seen corresponding path program 178 times [2021-06-05 14:01:02,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:02,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944146117] [2021-06-05 14:01:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:02,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:02,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944146117] [2021-06-05 14:01:02,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944146117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763778015] [2021-06-05 14:01:02,663 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:02,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:02,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:02,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:02,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:02,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763778015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:02,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:02,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 14:01:02,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267501046] [2021-06-05 14:01:02,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:02,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:02,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:02,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:02,921 INFO L87 Difference]: Start difference. First operand 136923 states and 504696 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:03,570 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-05 14:01:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:04,589 INFO L93 Difference]: Finished difference Result 137357 states and 505946 transitions. [2021-06-05 14:01:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:04,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:04,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:05,019 INFO L225 Difference]: With dead ends: 137357 [2021-06-05 14:01:05,019 INFO L226 Difference]: Without dead ends: 137275 [2021-06-05 14:01:05,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 953.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137275 states. [2021-06-05 14:01:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137275 to 136972. [2021-06-05 14:01:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136972 states, 136971 states have (on average 3.6859627220360514) internal successors, (504870), 136971 states have internal predecessors, (504870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136972 states to 136972 states and 504870 transitions. [2021-06-05 14:01:09,030 INFO L78 Accepts]: Start accepts. Automaton has 136972 states and 504870 transitions. Word has length 33 [2021-06-05 14:01:09,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:09,030 INFO L482 AbstractCegarLoop]: Abstraction has 136972 states and 504870 transitions. [2021-06-05 14:01:09,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:09,030 INFO L276 IsEmpty]: Start isEmpty. Operand 136972 states and 504870 transitions. [2021-06-05 14:01:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:09,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:09,434 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:09,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:09,637 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:09,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash 963765726, now seen corresponding path program 179 times [2021-06-05 14:01:09,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:09,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396477282] [2021-06-05 14:01:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:09,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:09,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396477282] [2021-06-05 14:01:09,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396477282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:09,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626519419] [2021-06-05 14:01:09,733 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:09,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:01:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:09,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:09,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:09,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626519419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:09,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:09,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 14:01:09,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267118246] [2021-06-05 14:01:09,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:09,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:09,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:09,994 INFO L87 Difference]: Start difference. First operand 136972 states and 504870 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:11,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:11,707 INFO L93 Difference]: Finished difference Result 137654 states and 506819 transitions. [2021-06-05 14:01:11,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:11,708 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:11,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:12,185 INFO L225 Difference]: With dead ends: 137654 [2021-06-05 14:01:12,185 INFO L226 Difference]: Without dead ends: 137544 [2021-06-05 14:01:12,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 292.6ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:12,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137544 states. [2021-06-05 14:01:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137544 to 137016. [2021-06-05 14:01:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137016 states, 137015 states have (on average 3.6854650950625842) internal successors, (504964), 137015 states have internal predecessors, (504964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137016 states to 137016 states and 504964 transitions. [2021-06-05 14:01:15,605 INFO L78 Accepts]: Start accepts. Automaton has 137016 states and 504964 transitions. Word has length 33 [2021-06-05 14:01:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:15,605 INFO L482 AbstractCegarLoop]: Abstraction has 137016 states and 504964 transitions. [2021-06-05 14:01:15,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 137016 states and 504964 transitions. [2021-06-05 14:01:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:15,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:15,899 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:16,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:16,100 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:16,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1018587486, now seen corresponding path program 180 times [2021-06-05 14:01:16,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:16,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91358397] [2021-06-05 14:01:16,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:16,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:16,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91358397] [2021-06-05 14:01:16,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91358397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:16,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680872995] [2021-06-05 14:01:16,198 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:16,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:01:16,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:16,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:16,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680872995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:16,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:16,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 14:01:16,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403736726] [2021-06-05 14:01:16,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:16,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:16,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:16,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:16,496 INFO L87 Difference]: Start difference. First operand 137016 states and 504964 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:18,206 INFO L93 Difference]: Finished difference Result 137774 states and 507159 transitions. [2021-06-05 14:01:18,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:18,207 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:18,660 INFO L225 Difference]: With dead ends: 137774 [2021-06-05 14:01:18,660 INFO L226 Difference]: Without dead ends: 137632 [2021-06-05 14:01:18,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 956.0ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137632 states. [2021-06-05 14:01:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137632 to 137314. [2021-06-05 14:01:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137314 states, 137313 states have (on average 3.6842760700006556) internal successors, (505899), 137313 states have internal predecessors, (505899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137314 states to 137314 states and 505899 transitions. [2021-06-05 14:01:22,895 INFO L78 Accepts]: Start accepts. Automaton has 137314 states and 505899 transitions. Word has length 33 [2021-06-05 14:01:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:22,895 INFO L482 AbstractCegarLoop]: Abstraction has 137314 states and 505899 transitions. [2021-06-05 14:01:22,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:22,895 INFO L276 IsEmpty]: Start isEmpty. Operand 137314 states and 505899 transitions. [2021-06-05 14:01:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:23,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:23,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 14:01:23,401 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2060260002, now seen corresponding path program 181 times [2021-06-05 14:01:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143719776] [2021-06-05 14:01:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:23,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143719776] [2021-06-05 14:01:23,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143719776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:23,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22159015] [2021-06-05 14:01:23,560 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:23,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22159015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:23,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:23,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 14:01:23,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911687435] [2021-06-05 14:01:23,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:23,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:23,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:23,829 INFO L87 Difference]: Start difference. First operand 137314 states and 505899 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:25,628 INFO L93 Difference]: Finished difference Result 138356 states and 508861 transitions. [2021-06-05 14:01:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:26,105 INFO L225 Difference]: With dead ends: 138356 [2021-06-05 14:01:26,105 INFO L226 Difference]: Without dead ends: 138306 [2021-06-05 14:01:26,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138306 states. [2021-06-05 14:01:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138306 to 137637. [2021-06-05 14:01:28,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137637 states, 137636 states have (on average 3.6833241303147433) internal successors, (506958), 137636 states have internal predecessors, (506958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:29,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137637 states to 137637 states and 506958 transitions. [2021-06-05 14:01:29,494 INFO L78 Accepts]: Start accepts. Automaton has 137637 states and 506958 transitions. Word has length 33 [2021-06-05 14:01:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:29,494 INFO L482 AbstractCegarLoop]: Abstraction has 137637 states and 506958 transitions. [2021-06-05 14:01:29,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 137637 states and 506958 transitions. [2021-06-05 14:01:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:29,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:29,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:29,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 14:01:29,968 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:29,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:29,968 INFO L82 PathProgramCache]: Analyzing trace with hash -138504034, now seen corresponding path program 182 times [2021-06-05 14:01:29,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:29,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13939578] [2021-06-05 14:01:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:30,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:30,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13939578] [2021-06-05 14:01:30,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13939578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:30,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233095030] [2021-06-05 14:01:30,059 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:30,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:01:30,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:30,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:30,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:30,856 WARN L205 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2021-06-05 14:01:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:31,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233095030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:31,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:31,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 14:01:31,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160092388] [2021-06-05 14:01:31,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:31,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:31,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:31,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:31,045 INFO L87 Difference]: Start difference. First operand 137637 states and 506958 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:32,030 INFO L93 Difference]: Finished difference Result 138581 states and 509568 transitions. [2021-06-05 14:01:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:01:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:32,476 INFO L225 Difference]: With dead ends: 138581 [2021-06-05 14:01:32,476 INFO L226 Difference]: Without dead ends: 138407 [2021-06-05 14:01:32,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138407 states. [2021-06-05 14:01:35,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138407 to 138053. [2021-06-05 14:01:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138053 states, 138052 states have (on average 3.681779329528004) internal successors, (508277), 138052 states have internal predecessors, (508277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138053 states to 138053 states and 508277 transitions. [2021-06-05 14:01:36,334 INFO L78 Accepts]: Start accepts. Automaton has 138053 states and 508277 transitions. Word has length 33 [2021-06-05 14:01:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:36,334 INFO L482 AbstractCegarLoop]: Abstraction has 138053 states and 508277 transitions. [2021-06-05 14:01:36,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 138053 states and 508277 transitions. [2021-06-05 14:01:36,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:36,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:36,618 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:36,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 14:01:36,820 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:36,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1821858026, now seen corresponding path program 183 times [2021-06-05 14:01:36,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:36,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965568966] [2021-06-05 14:01:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:36,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965568966] [2021-06-05 14:01:36,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965568966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:36,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385314771] [2021-06-05 14:01:36,902 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:36,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:01:36,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:37,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385314771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:37,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:37,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:01:37,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595279268] [2021-06-05 14:01:37,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:01:37,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:37,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:01:37,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:37,154 INFO L87 Difference]: Start difference. First operand 138053 states and 508277 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:38,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:38,709 INFO L93 Difference]: Finished difference Result 138483 states and 509458 transitions. [2021-06-05 14:01:38,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:01:38,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:38,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:39,186 INFO L225 Difference]: With dead ends: 138483 [2021-06-05 14:01:39,186 INFO L226 Difference]: Without dead ends: 138301 [2021-06-05 14:01:39,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 271.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138301 states. [2021-06-05 14:01:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138301 to 138093. [2021-06-05 14:01:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138093 states, 138092 states have (on average 3.6815239115951686) internal successors, (508389), 138092 states have internal predecessors, (508389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138093 states to 138093 states and 508389 transitions. [2021-06-05 14:01:42,456 INFO L78 Accepts]: Start accepts. Automaton has 138093 states and 508389 transitions. Word has length 33 [2021-06-05 14:01:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:42,456 INFO L482 AbstractCegarLoop]: Abstraction has 138093 states and 508389 transitions. [2021-06-05 14:01:42,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 138093 states and 508389 transitions. [2021-06-05 14:01:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:42,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:42,721 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:42,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:42,925 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -137840346, now seen corresponding path program 184 times [2021-06-05 14:01:42,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:42,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570451769] [2021-06-05 14:01:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:43,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:43,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570451769] [2021-06-05 14:01:43,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570451769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:43,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110372476] [2021-06-05 14:01:43,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:43,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:01:43,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:43,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110372476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:43,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:43,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:01:43,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733193862] [2021-06-05 14:01:43,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:01:43,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:43,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:01:43,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:43,991 INFO L87 Difference]: Start difference. First operand 138093 states and 508389 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:45,424 INFO L93 Difference]: Finished difference Result 138781 states and 510361 transitions. [2021-06-05 14:01:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:01:45,425 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:46,033 INFO L225 Difference]: With dead ends: 138781 [2021-06-05 14:01:46,034 INFO L226 Difference]: Without dead ends: 138699 [2021-06-05 14:01:46,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 918.8ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138699 states. [2021-06-05 14:01:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138699 to 138281. [2021-06-05 14:01:48,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138281 states, 138280 states have (on average 3.6812481920740527) internal successors, (509043), 138280 states have internal predecessors, (509043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138281 states to 138281 states and 509043 transitions. [2021-06-05 14:01:49,482 INFO L78 Accepts]: Start accepts. Automaton has 138281 states and 509043 transitions. Word has length 33 [2021-06-05 14:01:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:49,482 INFO L482 AbstractCegarLoop]: Abstraction has 138281 states and 509043 transitions. [2021-06-05 14:01:49,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:49,482 INFO L276 IsEmpty]: Start isEmpty. Operand 138281 states and 509043 transitions. [2021-06-05 14:01:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:49,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:49,756 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:49,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:49,957 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:49,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1939105810, now seen corresponding path program 185 times [2021-06-05 14:01:49,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:49,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734329624] [2021-06-05 14:01:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:50,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:50,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734329624] [2021-06-05 14:01:50,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734329624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:50,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633235357] [2021-06-05 14:01:50,079 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:50,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:01:50,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:50,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:50,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:51,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633235357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:51,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:51,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:01:51,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536611414] [2021-06-05 14:01:51,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:01:51,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:51,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:01:51,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:01:51,135 INFO L87 Difference]: Start difference. First operand 138281 states and 509043 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:52,168 INFO L93 Difference]: Finished difference Result 138841 states and 510581 transitions. [2021-06-05 14:01:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:01:52,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:52,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:52,603 INFO L225 Difference]: With dead ends: 138841 [2021-06-05 14:01:52,603 INFO L226 Difference]: Without dead ends: 138765 [2021-06-05 14:01:52,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:01:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138765 states. [2021-06-05 14:01:55,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138765 to 138390. [2021-06-05 14:01:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138390 states, 138389 states have (on average 3.6810729176451886) internal successors, (509420), 138389 states have internal predecessors, (509420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138390 states to 138390 states and 509420 transitions. [2021-06-05 14:01:56,642 INFO L78 Accepts]: Start accepts. Automaton has 138390 states and 509420 transitions. Word has length 33 [2021-06-05 14:01:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:01:56,642 INFO L482 AbstractCegarLoop]: Abstraction has 138390 states and 509420 transitions. [2021-06-05 14:01:56,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 138390 states and 509420 transitions. [2021-06-05 14:01:56,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:01:56,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:01:56,942 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:01:57,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 14:01:57,143 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:01:57,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:01:57,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1744422478, now seen corresponding path program 186 times [2021-06-05 14:01:57,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:01:57,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427637431] [2021-06-05 14:01:57,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:01:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:01:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:57,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:01:57,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427637431] [2021-06-05 14:01:57,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427637431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:57,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849763995] [2021-06-05 14:01:57,238 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:01:57,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 14:01:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:01:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:01:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:01:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:01:57,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849763995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:01:57,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:01:57,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 14:01:57,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123075906] [2021-06-05 14:01:57,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 14:01:57,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:01:57,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 14:01:57,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:01:57,543 INFO L87 Difference]: Start difference. First operand 138390 states and 509420 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:01:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:01:59,267 INFO L93 Difference]: Finished difference Result 139561 states and 512775 transitions. [2021-06-05 14:01:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:01:59,267 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:01:59,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:01:59,742 INFO L225 Difference]: With dead ends: 139561 [2021-06-05 14:01:59,743 INFO L226 Difference]: Without dead ends: 139512 [2021-06-05 14:01:59,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:01:59,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139512 states. [2021-06-05 14:02:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139512 to 138609. [2021-06-05 14:02:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138609 states, 138608 states have (on average 3.681490245873254) internal successors, (510284), 138608 states have internal predecessors, (510284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138609 states to 138609 states and 510284 transitions. [2021-06-05 14:02:02,983 INFO L78 Accepts]: Start accepts. Automaton has 138609 states and 510284 transitions. Word has length 33 [2021-06-05 14:02:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:02,983 INFO L482 AbstractCegarLoop]: Abstraction has 138609 states and 510284 transitions. [2021-06-05 14:02:02,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 138609 states and 510284 transitions. [2021-06-05 14:02:03,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:02:03,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:03,982 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:04,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:04,213 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:04,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:04,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1200847454, now seen corresponding path program 187 times [2021-06-05 14:02:04,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:04,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370935838] [2021-06-05 14:02:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:04,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:04,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370935838] [2021-06-05 14:02:04,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370935838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:04,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809925662] [2021-06-05 14:02:04,301 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:02:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:04,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809925662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:04,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:04,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:02:04,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467997291] [2021-06-05 14:02:04,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:02:04,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:04,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:02:04,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:02:04,552 INFO L87 Difference]: Start difference. First operand 138609 states and 510284 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:05,688 INFO L93 Difference]: Finished difference Result 139165 states and 511834 transitions. [2021-06-05 14:02:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:02:05,689 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:02:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:02:06,712 INFO L225 Difference]: With dead ends: 139165 [2021-06-05 14:02:06,713 INFO L226 Difference]: Without dead ends: 139021 [2021-06-05 14:02:06,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:06,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139021 states. [2021-06-05 14:02:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139021 to 138669. [2021-06-05 14:02:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138669 states, 138668 states have (on average 3.6814261401332677) internal successors, (510496), 138668 states have internal predecessors, (510496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138669 states to 138669 states and 510496 transitions. [2021-06-05 14:02:10,184 INFO L78 Accepts]: Start accepts. Automaton has 138669 states and 510496 transitions. Word has length 33 [2021-06-05 14:02:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:02:10,184 INFO L482 AbstractCegarLoop]: Abstraction has 138669 states and 510496 transitions. [2021-06-05 14:02:10,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 138669 states and 510496 transitions. [2021-06-05 14:02:10,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 14:02:10,465 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:02:10,465 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:02:10,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:10,666 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:02:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:02:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1938066470, now seen corresponding path program 188 times [2021-06-05 14:02:10,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:02:10,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276888273] [2021-06-05 14:02:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:02:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:02:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:02:10,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:02:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276888273] [2021-06-05 14:02:10,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276888273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:10,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777102372] [2021-06-05 14:02:10,761 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:10,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:02:10,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:02:10,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:02:10,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:02:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:02:11,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777102372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:02:11,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:02:11,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 14:02:11,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198497292] [2021-06-05 14:02:11,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 14:02:11,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:02:11,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 14:02:11,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:02:11,006 INFO L87 Difference]: Start difference. First operand 138669 states and 510496 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:02:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:02:12,606 INFO L93 Difference]: Finished difference Result 139131 states and 511744 transitions. [2021-06-05 14:02:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:02:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 14:02:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-05 14:02:13,083 INFO L225 Difference]: With dead ends: 139131 [2021-06-05 14:02:13,084 INFO L226 Difference]: Without dead ends: 139071 [2021-06-05 14:02:13,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:02:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139071 states. [2021-06-05 14:02:13,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:02:13,449 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:02:13,451 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:02:13,452 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:02:13,453 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:02:13 BasicIcfg [2021-06-05 14:02:13,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:02:13,453 INFO L168 Benchmark]: Toolchain (without parser) took 665370.93 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 334.1 MB in the beginning and 11.2 GB in the end (delta: -10.8 GB). Peak memory consumption was 4.8 GB. Max. memory is 16.0 GB. [2021-06-05 14:02:13,453 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 354.4 MB. Free memory was 335.3 MB in the beginning and 335.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:02:13,453 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 354.4 MB. Free memory was 334.1 MB in the beginning and 332.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:02:13,453 INFO L168 Benchmark]: Boogie Preprocessor took 20.63 ms. Allocated memory is still 354.4 MB. Free memory was 332.6 MB in the beginning and 331.6 MB in the end (delta: 979.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:02:13,454 INFO L168 Benchmark]: RCFGBuilder took 307.87 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 319.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 14:02:13,454 INFO L168 Benchmark]: TraceAbstraction took 665007.70 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 318.5 MB in the beginning and 11.2 GB in the end (delta: -10.9 GB). Peak memory consumption was 4.8 GB. Max. memory is 16.0 GB. [2021-06-05 14:02:13,454 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 0.13 ms. Allocated memory is still 354.4 MB. Free memory was 335.3 MB in the beginning and 335.2 MB in the end (delta: 70.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.30 ms. Allocated memory is still 354.4 MB. Free memory was 334.1 MB in the beginning and 332.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.63 ms. Allocated memory is still 354.4 MB. Free memory was 332.6 MB in the beginning and 331.6 MB in the end (delta: 979.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 307.87 ms. Allocated memory is still 354.4 MB. Free memory was 331.6 MB in the beginning and 319.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 665007.70 ms. Allocated memory was 354.4 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 318.5 MB in the beginning and 11.2 GB in the end (delta: -10.9 GB). Peak memory consumption was 4.8 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 664897.0ms, OverallIterations: 197, TraceHistogramMax: 3, EmptinessCheckTime: 34619.9ms, AutomataDifference: 212872.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 27.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11550 SDtfs, 24070 SDslu, 116973 SDs, 0 SdLazy, 79685 SolverSat, 3856 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36989.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8506 GetRequests, 4241 SyntacticMatches, 45 SemanticMatches, 4220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33086 ImplicationChecksByTransitivity, 56468.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=138669occurred in iteration=196, InterpolantAutomatonStates: 3462, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 316929.4ms AutomataMinimizationTime, 197 MinimizatonAttempts, 693073 StatesRemovedByMinimization, 196 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 764.1ms SsaConstructionTime, 2830.0ms SatisfiabilityAnalysisTime, 52124.8ms InterpolantComputationTime, 11093 NumberOfCodeBlocks, 11077 NumberOfCodeBlocksAsserted, 731 NumberOfCheckSat, 10706 ConstructedInterpolants, 0 QuantifiedInterpolants, 142366 SizeOfPredicates, 794 NumberOfNonLiveVariables, 15295 ConjunctsInSsa, 3366 ConjunctsInUnsatCore, 387 InterpolantComputations, 7 PerfectInterpolantSequences, 809/6596 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown